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Ecshop的商品筛选功能实现分析之一(主要对category.php进行分析)

一、首先,说明一下为什么要对category.php文件进行分析。

(1)原因如下:

①个人对商城类商品筛选功能的实现比较好奇;

②对商城中关于商品的数据表设计比较感兴趣。(该功能涉及到与数据库的交互,而且与数据库中数据表的设计好坏有一定的联系);

③多条件(属性)筛选功能在现今的很多网站都需要用到,很广泛(如:一般商城网、团购网、房产网、信息分类网站等等)。

(2)希望达到的目的是:

①能够对多条件筛选功能有一个初步的认识。(起码自己做,也能够快速实现吧);

②对多条件筛选的实现中,数据库该如何去设计才会更优化和更合理些(参考前人的经验);

③对多条件筛选中的一些策略或者是技巧,能有一个了解(会总结几点)

 

二、然后,我们首先看一下现在需求是如何的?(多条件筛选,请参考京东、苏宁、国美等)

①京东商城的商品筛选功能(截图):

 

②苏宁商城的商品筛选功能(截图)

 

③国美在线的商品筛选功能(截图)

 

补充:其实,要对该功能的观察,还必须对地址栏,也作一番思考的,我这里就省略了,毕竟如果这样分析,会更简单一些。上面这些例子,只作一个引子吧。后续我会完善它的。

 

④ECSHOP的商品筛选功能实现,展示细节(截图+文字)如下:

1)首先,我本地服务器,给本机安装的ecshop演示网站,配了一个虚拟主机地址:为 http://demo.ecshop.com

2)然后,我就通过该地址来访问主页,并查看属于导航栏中“GSM手机”分类下的商品。如下:

访问地址为:http://demo.ecshop.com/category.php?id=3   

结果页面为:

 

那么,此时的访问,会罗列出,属于“GSM手机”分类下(即cat_id=3)的所有商品,因为目前还没有对商品进行多筛选。

 

 

如果我想查看品牌为“诺基亚”的手机,那么点击“诺基亚”标签即可:

访问地址为:  http://demo.ecshop.com/category.php?id=3&brand=1&price_min=0&price_max=0

结果页面为:

 

如果我选择了多条件搜索,看截图:

访问地址为: http://demo.ecshop.com/category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.0.160.0

结果页面为:

 

 

分析:从上面的地址栏的变化和截图的变化,可以初步看出ecshop的多条件搜索方法是怎么样的了。

猜想1:随着用户每一次点击条件(属性)进行商品筛选时,搜索地址栏会变化,为什么地址栏会变化,归根结底,一定是每一个商品的属性的a标签的超链接地址被改变了。而且是每点击一次,都会随着搜索条件的不同,而改变。

从而我们知道,这个属性的超链接,是动态生成的。ecshop后台一定是作了大量的判断过程,并最终为每一个商品属性,生成一个超链接地址,以防止上一次的搜索条件丢失。

猜想2:商品的价格区间,是根据什么来计算的呢?还是人工后台设置的,京东的商品价格区间,好像都是很有规律的,和ecshop的价格区间,有比较大的区别。别管这么多了,我们还是先研究ecshop的再说。

猜想3:参数 filter_attr=163.0.160.0 中的几个数字,一定代表着下面:颜色、屏幕大小 、手机制式、外观样式属性下,都选择了哪一些值了。

 

----> 带着这样一些疑问,那我们直接去研究一下ecshop是如何实现上面的多条件搜索功能啦。。。GO。。。

首先,我们到ecshop的网站更目录,找到category.php文件,打开它进行研究一下。

 

1.点击这里,查看全部代码的分析过程。

  1 <?php  2 /**  3  * 分析首页 商品分类页面category.php的实现方法  4  * ECSHOP 2.7.2 商品分类  5  */  6 define(‘IN_ECS‘, true);  7 require(dirname(__FILE__) . ‘/includes/init.php‘);  8 if ((DEBUG_MODE & 2) != 2) {  9     $smarty->caching = true; 10 } 11 12 //====> 请求地址栏:http://localhost/category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.160.186 13 //====> 1.获取分类id 14 /* 获得请求的分类 ID */ 15 if (isset($_REQUEST[‘id‘])) { 16     $cat_id = intval($_REQUEST[‘id‘]); 17 } 18 elseif (isset($_REQUEST[‘category‘])) { 19     $cat_id = intval($_REQUEST[‘category‘]); 20 } else { 21     /* 如果分类ID为0,则返回首页 */ 22     ecs_header("Location: ./\n"); 23     exit; 24 } 25 26 //====> 2.首先获取所有GET和POST中,可用于搜索的参数的值。 27 //====> 若没有此参数,则说明,并没有用此参数来搜索,默认要给它一个默认值。 28 /* 初始化分页信息 */ 29 $page = isset($_REQUEST[‘page‘])   && intval($_REQUEST[‘page‘])  > 0 ? intval($_REQUEST[‘page‘])  : 1; 30 $size = isset($_CFG[‘page_size‘])  && intval($_CFG[‘page_size‘]) > 0 ? intval($_CFG[‘page_size‘]) : 10; 31 $brand = isset($_REQUEST[‘brand‘]) && intval($_REQUEST[‘brand‘]) > 0 ? intval($_REQUEST[‘brand‘]) : 0; 32 $price_max = isset($_REQUEST[‘price_max‘]) && intval($_REQUEST[‘price_max‘]) > 0 ? intval($_REQUEST[‘price_max‘]) : 0; 33 $price_min = isset($_REQUEST[‘price_min‘]) && intval($_REQUEST[‘price_min‘]) > 0 ? intval($_REQUEST[‘price_min‘]) : 0; 34 $filter_attr_str = isset($_REQUEST[‘filter_attr‘]) ? htmlspecialchars(trim($_REQUEST[‘filter_attr‘])) : ‘0‘; 35 $filter_attr_str = urldecode($filter_attr_str); 36 $filter_attr = empty($filter_attr_str) ? ‘‘ : explode(‘.‘, trim($filter_attr_str)); 37 38 /* 排序、显示方式以及类型 */ 39 $default_display_type = $_CFG[‘show_order_type‘] == ‘0‘ ? ‘list‘ : ($_CFG[‘show_order_type‘] == ‘1‘ ? ‘grid‘ : ‘text‘); 40 $default_sort_order_method = $_CFG[‘sort_order_method‘] == ‘0‘ ? ‘DESC‘ : ‘ASC‘; 41 $default_sort_order_type   = $_CFG[‘sort_order_type‘] == ‘0‘ ? ‘goods_id‘ : ($_CFG[‘sort_order_type‘] == ‘1‘ ? ‘shop_price‘ : ‘last_update‘); 42 43 $sort  = (isset($_REQUEST[‘sort‘])  && in_array(trim(strtolower($_REQUEST[‘sort‘])), array(‘goods_id‘, ‘shop_price‘, ‘last_update‘))) ? trim($_REQUEST[‘sort‘])  : $default_sort_order_type; 44 $order = (isset($_REQUEST[‘order‘]) && in_array(trim(strtoupper($_REQUEST[‘order‘])), array(‘ASC‘, ‘DESC‘)))                              ? trim($_REQUEST[‘order‘]) : $default_sort_order_method; 45 $display  = (isset($_REQUEST[‘display‘]) && in_array(trim(strtolower($_REQUEST[‘display‘])), array(‘list‘, ‘grid‘, ‘text‘))) ? trim($_REQUEST[‘display‘])  : (isset($_COOKIE[‘ECS‘][‘display‘]) ? $_COOKIE[‘ECS‘][‘display‘] : $default_display_type); 46 $display  = in_array($display, array(‘list‘, ‘grid‘, ‘text‘)) ? $display : ‘text‘; 47 setcookie(‘ECS[display]‘, $display, gmtime() + 86400 * 7); 48 49 /* 页面的缓存ID */ 50 $cache_id = sprintf(‘%X‘, crc32($cat_id . ‘-‘ . $display . ‘-‘ . $sort  .‘-‘ . $order  .‘-‘ . $page . ‘-‘ . $size . ‘-‘ . $_SESSION[‘user_rank‘] . ‘-‘ . 51         $_CFG[‘lang‘] .‘-‘. $brand. ‘-‘ . $price_max . ‘-‘ .$price_min . ‘-‘ . $filter_attr_str)); 52 53 /* 如果页面没有被缓存则重新获取页面的内容 */ 54 if (!$smarty->is_cached(‘category.dwt‘, $cache_id)) { 55 //====> 3.把该栏目下的所有子栏目id获取,如果没有子栏目,则是自身。 56 //===> TABLE:ecs_category 57 //====> RETURN:id=3 => g.cat_id IN (‘3‘)  或 id=6 => g.cat_id IN (‘6‘,‘8‘,‘9‘,‘11‘,‘7‘) 58 //====> 说明:ecshop的特点是,顶级栏目下也可以添加商品,所以会把顶级栏目id也放在数组里面 59 $children = get_children($cat_id); 60 61 //====> 4.获得该分类的相关信息。如:分类名称、价格分级、筛选属性、父id 62 //===> TABLE:ecs_category 63 //====> RETURN:Array ( [cat_name] => GSM手机 [keywords] => [cat_desc] => [style] => [grade] => 4 [filter_attr] => 185,189,173,178 [parent_id] => 1 ) 64 $cat = get_cat_info($cat_id); 65 66 //===> 5.如果有品牌筛选brand参数,那么获取出该品牌名称 67 //===> TABLE:ecs_brand 68 //===> SQL:SELECT brand_name FROM `ecshop`.`ecs_brand` WHERE brand_id = ‘1‘ 69 //====> RETURN:诺基亚 70  /* 赋值固定内容 */ 71 if ($brand > 0) { 72     $sql = "SELECT brand_name FROM " .$GLOBALS[‘ecs‘]->table(‘brand‘). " WHERE brand_id = ‘$brand‘"; 73     $brand_name = $db->getOne($sql); 74 } else { 75     $brand_name = ‘‘; 76 } 77 78 79 ///>>================开始---商品价格区间处理==================>>/// 80 //===> 6.获取该分类cat的价格分级: 81 //===> ①如果价格分级=0,那么获取直接父类的价格分级。(Ⅰ如果父类价格也=0,那么就是不用价格分级 ) 82 //===> ②如果价格分级!=0,那么就是自身的价格分级。 83 //===> TABLE:ecs_category 84 //===> RETURN:$cat[‘grade‘]=4 85 /* 获取价格分级 */ 86 if ($cat[‘grade‘] == 0  && $cat[‘parent_id‘] != 0) { //  ==>如果价格分级为空,但是它还有上级分类,那么取直接上级的价格分级等数 87     $cat[‘grade‘] = get_parent_grade($cat_id); //如果当前分类级别为空,取最近的上级分类 88 } 89 90 //===> 7.对价格区间进行划分。 ecshop的划分方法,是根据算法来的,比较复杂。 91 //===> 如果价格分级>1,那么就执行价格区间划分 92 if ($cat[‘grade‘] > 1) { 93     /* 需要价格分级 */ 94 95     /* 96      算法思路: 97     1、当分级大于1时,进行价格分级 98     2、取出该类下商品价格的最大值、最小值 99     3、根据商品价格的最大值来计算商品价格的分级数量级:100     价格范围(不含最大值)    分级数量级101     0-0.1                   0.001102     0.1-1                   0.01103     1-10                    0.1104     10-100                  1105     100-1000                10106     1000-10000              100107     4、计算价格跨度:108     取整((最大值-最小值) / (价格分级数) / 数量级) * 数量级109     5、根据价格跨度计算价格范围区间110     6、查询数据库111112     可能存在问题:113     1、114     由于价格跨度是由最大值、最小值计算出来的115     然后再通过价格跨度来确定显示时的价格范围区间116     所以可能会存在价格分级数量不正确的问题117     该问题没有证明118     2、119     当价格=最大值时,分级会多出来,已被证明存在120     */121122     //===> 获得当前分类下商品价格的最大值、最小值123     //===> 获得所有扩展分类属于指定分类的所有商品ID ,其中goods_id = 16的商品的扩展属于分类3124     //===> TABLE:ecs_goods 和 ecs_goods_cat125     //===> SQL:SELECT min(g.shop_price) AS min, max(g.shop_price) as max FROM `ecshop`.`ecs_goods` AS g WHERE (g.cat_id IN (‘5‘) OR g.goods_id IN (‘8‘,‘16‘) ) AND g.is_delete = 0 AND g.is_on_sale = 1 AND g.is_alone_sale = 1126     //===> RETURN:Array ( [min] => 280.00 [max] => 5999.00 ) 127     $sql = "SELECT min(g.shop_price) AS min, max(g.shop_price) as max ".128             " FROM " . $ecs->table(‘goods‘). " AS g ".129             " WHERE ($children OR " . get_extension_goods($children) . ‘) AND g.is_delete = 0 AND g.is_on_sale = 1 AND g.is_alone_sale = 1  ‘;130     $row = $db->getRow($sql);131132133     //===> 按照公式计算出最低价格和最高价格、以及价格跨度134     //===============↓↓↓先不做讨论===============135     // 取得价格分级最小单位级数,比如,千元商品最小以100为级数136     $price_grade = 0.0001;137     for($i=-2; $i<= log10($row[‘max‘]); $i++) {138         $price_grade *= 10;139     }140141     //价格跨度142     $dx = ceil(($row[‘max‘] - $row[‘min‘]) / ($cat[‘grade‘]) / $price_grade) * $price_grade;143     if($dx == 0) {144         $dx = $price_grade;145     }146147     for($i = 1; $row[‘min‘] > $dx * $i; $i ++);148149         for($j = 1; $row[‘min‘] > $dx * ($i-1) + $price_grade * $j; $j++);150         $row[‘min‘] = $dx * ($i-1) + $price_grade * ($j - 1);151152         for(; $row[‘max‘] >= $dx * $i; $i ++);153         $row[‘max‘] = $dx * ($i) + $price_grade * ($j - 1);154155         //===>这里打印最高价格和最低价格:$row=>Array ( [min] => 200 [max] => 6200 )156         //===>这里打印价格跨度:$dx = 1500157158         //===============先不做讨论↑↑↑==================//159160161         //===> 根据商品的价格、价格区间的最低价格、以及价格跨度,计算该商品价格属于哪一个区间内。162         //===> 获取属于该价格区间内的商品的数量、获取sn则属于哪一个区间sn=0为200-1700、sn=1为1700-3200、sn=3为4700-6200。163         //===> 因为没有商品价格属于第二区间,则不存在sn=2,那么3200-4700则没有任何商品164         //===> TABLE:ecs_goods 和 ecs_goods_cat165         //===> SQL:SELECT (FLOOR((g.shop_price - 200) / 1500)) AS sn, COUNT(*) AS goods_num FROM `ecshop`.`ecs_goods` AS g WHERE (g.cat_id IN (‘3‘) OR g.goods_id IN (‘16‘) ) AND g.is_delete = 0 AND g.is_on_sale = 1 AND g.is_alone_sale = 1 GROUP BY sn166         //===>RETURN:Array ( [0] => Array ( [sn] => 0 [goods_num] => 6 ) [1] => Array ( [sn] => 1 [goods_num] => 5 ) [2] => Array ( [sn] => 3 [goods_num] => 1 ) ) 167         $sql = "SELECT (FLOOR((g.shop_price - $row[min]) / $dx)) AS sn, COUNT(*) AS goods_num  ".168                 " FROM " . $ecs->table(‘goods‘) . " AS g ".169                 " WHERE ($children OR " . get_extension_goods($children) . ‘) AND g.is_delete = 0 AND g.is_on_sale = 1 AND g.is_alone_sale = 1 ‘.170                 " GROUP BY sn ";171         $price_grade = $db->getAll($sql);172173174         //===> 根据价格等级price_grade,计算真正的价格区间。175         //===> 方法build_uri()重要:要为每一个价格区间,生成一个url超链接,以备前台点击搜索用176         //===> 并根据价格参数,判断该区间,是否是当前被搜索的区间177         //===> 把价格区间,注入模板,供前台使用178         //===> RETURN:Array ( [0] => Array ( [sn] => 0 [goods_num] => 6 [start] => 0 [end] => 0 [price_range] => 全部 [url] => category.php?id=3&brand=1&price_min=0&price_max=0&filter_attr=163.216.160.186 [selected] => 0 ) [1] => Array ( [sn] => 1 [goods_num] => 6 [start] => 200 [end] => 1700 [price_range] => 200 - 1700 [formated_start] => ¥200元 [formated_end] => ¥1700元 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 1 ) [2] => Array ( [sn] => 3 [goods_num] => 5 [start] => 1700 [end] => 3200 [price_range] => 1700 - 3200 [formated_start] => ¥1700元 [formated_end] => ¥3200元 [url] => category.php?id=3&brand=1&price_min=1700&price_max=3200&filter_attr=163.216.160.186 [selected] => 0 ) [3] => Array ( [goods_num] => 1 [start] => 4700 [end] => 6200 [price_range] => 4700 - 6200 [formated_start] => ¥4700元 [formated_end] => ¥6200元 [url] => category.php?id=3&brand=1&price_min=4700&price_max=6200&filter_attr=163.216.160.186 [selected] => 0 ) ) 179         foreach ($price_grade as $key=>$val) {180             $temp_key = $key + 1;181             $price_grade[$temp_key][‘goods_num‘] = $val[‘goods_num‘];182             $price_grade[$temp_key][‘start‘] = $row[‘min‘] + round($dx * $val[‘sn‘]);183             $price_grade[$temp_key][‘end‘] = $row[‘min‘] + round($dx * ($val[‘sn‘] + 1));184             $price_grade[$temp_key][‘price_range‘] = $price_grade[$temp_key][‘start‘] . ‘&nbsp;-&nbsp;‘ . $price_grade[$temp_key][‘end‘];185             $price_grade[$temp_key][‘formated_start‘] = price_format($price_grade[$temp_key][‘start‘]);186             $price_grade[$temp_key][‘formated_end‘] = price_format($price_grade[$temp_key][‘end‘]);187             $price_grade[$temp_key][‘url‘] = build_uri(‘category‘, array(‘cid‘=>$cat_id, ‘bid‘=>$brand, ‘price_min‘=>$price_grade[$temp_key][‘start‘], ‘price_max‘=> $price_grade[$temp_key][‘end‘], ‘filter_attr‘=>$filter_attr_str), $cat[‘cat_name‘]);188             /* 判断价格区间是否被选中 */189             if (isset($_REQUEST[‘price_min‘]) && $price_grade[$temp_key][‘start‘] == $price_min && $price_grade[$temp_key][‘end‘] == $price_max) {190                 $price_grade[$temp_key][‘selected‘] = 1;191             }192             else {193                 $price_grade[$temp_key][‘selected‘] = 0;194             }195         }196         //补充一个选择全部的类型的数组197         $price_grade[0][‘start‘] = 0;198         $price_grade[0][‘end‘] = 0;199         $price_grade[0][‘price_range‘] = $_LANG[‘all_attribute‘];200         $price_grade[0][‘url‘] = build_uri(‘category‘, array(‘cid‘=>$cat_id, ‘bid‘=>$brand, ‘price_min‘=>0, ‘price_max‘=> 0, ‘filter_attr‘=>$filter_attr_str), $cat[‘cat_name‘]);201         $price_grade[0][‘selected‘] = empty($price_max) ? 1 : 0;202         //把价格区间数组,注入模板文件203         $smarty->assign(‘price_grade‘,     $price_grade);204     }205     ///<<================结束---商品价格区间处理==================<<///206207208     ///>>================开始---商品品牌处理==================>>///209     //====> ???db_create_in(array_unique(array_merge(array($cat_id), array_keys(cat_list($cat_id, 0, false))))) . ")210     //===> 品牌筛选功能:把该栏目下(其中包括扩展分类下的商品),所有商品的品牌获取,但不能重复。211     //===> 品牌下有商品并且商品状态正常,才能把该品牌取出。没有商品的品牌不能取出212     //===> TABLE:ecs_brand、ecs_goods 和 ecs_goods_cat213     //===> SQL:SELECT b.brand_id, b.brand_name, COUNT(*) AS goods_num FROM `ecshop`.`ecs_brand`AS b, `ecshop`.`ecs_goods` AS g LEFT JOIN `ecshop`.`ecs_goods_cat` AS gc ON g.goods_id = gc.goods_id WHERE g.brand_id = b.brand_id AND (g.cat_id IN (‘3‘) OR gc.cat_id IN (‘3‘) ) AND b.is_show = 1 AND g.is_on_sale = 1 AND g.is_alone_sale = 1 AND g.is_delete = 0 GROUP BY b.brand_id HAVING goods_num > 0 ORDER BY b.sort_order, b.brand_id ASC214     //===> RETURN:Array ( [0] => Array ( [brand_id] => 1 [brand_name] => 诺基亚 [goods_num] => 3 ) [1] => Array ( [brand_id] => 2 [brand_name] => 摩托罗拉 [goods_num] => 1 ) [2] => Array ( [brand_id] => 3 [brand_name] => 多普达 [goods_num] => 1 ) [3] => Array ( [brand_id] => 4 [brand_name] => 飞利浦 [goods_num] => 2 ) [4] => Array ( [brand_id] => 5 [brand_name] => 夏新 [goods_num] => 1 ) [5] => Array ( [brand_id] => 6 [brand_name] => 三星 [goods_num] => 2 ) [6] => Array ( [brand_id] => 7 [brand_name] => 索爱 [goods_num] => 1 ) [7] => Array ( [brand_id] => 9 [brand_name] => 联想 [goods_num] => 1 ) [8] => Array ( [brand_id] => 10 [brand_name] => 金立 [goods_num] => 1 ) ) 215     /* 品牌筛选 */216     $sql = "SELECT b.brand_id, b.brand_name, COUNT(*) AS goods_num ".217             "FROM " . $GLOBALS[‘ecs‘]->table(‘brand‘) . "AS b, ".218             $GLOBALS[‘ecs‘]->table(‘goods‘) . " AS g LEFT JOIN ". $GLOBALS[‘ecs‘]->table(‘goods_cat‘) . " AS gc ON g.goods_id = gc.goods_id " .219             "WHERE g.brand_id = b.brand_id AND ($children OR " . ‘gc.cat_id ‘ . db_create_in(array_unique(array_merge(array($cat_id), array_keys(cat_list($cat_id, 0, false))))) . ") AND b.is_show = 1 " .220             " AND g.is_on_sale = 1 AND g.is_alone_sale = 1 AND g.is_delete = 0 ".221             "GROUP BY b.brand_id HAVING goods_num > 0 ORDER BY b.sort_order, b.brand_id ASC";222     $brands = $GLOBALS[‘db‘]->getAll($sql);223224     //===> 把该分类下所有商品的品牌,组合成数组,给前台调用225     //===> 方法build_uri()重要:要为每品牌,生成一个url超链接,以备前台点击搜索用226     //===> 把数组注入模板文件227     //====! 这样一种组织数组的方式,有它的缺陷:就是说不能够把每一个品牌下面的,商品的数量保存下来,同时也会有一些无用的数据,掺杂其中。228     //RETURN:Array ( [0] => Array ( [brand_id] => 1 [brand_name] => 全部 [goods_num] => 3 [url] => category.php?id=3&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 0 ) [1] => Array ( [brand_id] => 2 [brand_name] => 诺基亚 [goods_num] => 1 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 1 ) [2] => Array ( [brand_id] => 3 [brand_name] => 摩托罗拉 [goods_num] => 1 [url] => category.php?id=3&brand=2&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 0 ) [3] => Array ( [brand_id] => 4 [brand_name] => 多普达 [goods_num] => 2 [url] => category.php?id=3&brand=3&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 0 ) [4] => Array ( [brand_id] => 5 [brand_name] => 飞利浦 [goods_num] => 1 [url] => category.php?id=3&brand=4&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 0 ) [5] => Array ( [brand_id] => 6 [brand_name] => 夏新 [goods_num] => 2 [url] => category.php?id=3&brand=5&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 0 ) [6] => Array ( [brand_id] => 7 [brand_name] => 三星 [goods_num] => 1 [url] => category.php?id=3&brand=6&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 0 ) [7] => Array ( [brand_id] => 9 [brand_name] => 索爱 [goods_num] => 1 [url] => category.php?id=3&brand=7&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 0 ) [8] => Array ( [brand_id] => 10 [brand_name] => 联想 [goods_num] => 1 [url] => category.php?id=3&brand=9&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 0 ) [9] => Array ( [brand_name] => 金立 [url] => category.php?id=3&brand=10&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 0 ) ) 229     foreach ($brands AS $key => $val) {230         $temp_key = $key + 1;231         $brands[$temp_key][‘brand_name‘] = $val[‘brand_name‘];232         $brands[$temp_key][‘url‘] = build_uri(‘category‘, array(‘cid‘ => $cat_id, ‘bid‘ => $val[‘brand_id‘], ‘price_min‘=>$price_min, ‘price_max‘=> $price_max, ‘filter_attr‘=>$filter_attr_str), $cat[‘cat_name‘]);233         /* 判断品牌是否被选中 */234         if ($brand == $brands[$key][‘brand_id‘]) {235             $brands[$temp_key][‘selected‘] = 1;236         } else {237             $brands[$temp_key][‘selected‘] = 0;238         }239     }240     //补充一个选择全部品牌的数组241     $brands[0][‘brand_name‘] = $_LANG[‘all_attribute‘];242     $brands[0][‘url‘] = build_uri(‘category‘, array(‘cid‘ => $cat_id, ‘bid‘ => 0, ‘price_min‘=>$price_min, ‘price_max‘=> $price_max, ‘filter_attr‘=>$filter_attr_str), $cat[‘cat_name‘]);243     $brands[0][‘selected‘] = empty($brand) ? 1 : 0;244     //把品牌数组注入模板245     $smarty->assign(‘brands‘, $brands);246     ///<<==================结束---商品品牌处理==================<<///247248249250     ///>>==================开始---商品属性处理==================>>///251     /* 属性筛选 */252     $ext = ‘‘; //商品查询条件扩展253     if ($cat[‘filter_attr‘] > 0) {254         //===>需要筛选的属性,是人工在后台添加的,存放在ecs_category 表的中 filter_attr字段里面,格式如:185,189,120,190255         //===>RETURN:Array ( [0] => 185 [1] => 189 [2] => 173 [3] => 178 )256         $cat_filter_attr = explode(‘,‘, $cat[‘filter_attr‘]);       //提取出此分类的筛选属性257258         //===> 然后,对每一个属性(此属性是主属性,下面还有子属性),循环进行操作259         //===> ①获取该属性的属性名260         //===> ②获取该属性的所有子属性(子属性必须是有被商品在使用的,不然,不要将其显示出来)261         //===> 意义:因为该属性涉及到搜索参数,如果该属性下本身没有商品,那么就没有显示出来的意义了。262         //===> RETURN: Array ( [0] => Array ( [attr_id] => 185 [goods_id] => 167 [attr_value] => 灰色 ) [1] => Array ( [attr_id] => 185 [goods_id] => 198 [attr_value] => 白色 ) [2] => Array ( [attr_id] => 185 [goods_id] => 197 [attr_value] => 金色 ) [3] => Array ( [attr_id] => 185 [goods_id] => 163 [attr_value] => 黑色 ) ) 263         $all_attr_list = array();264         foreach ($cat_filter_attr AS $key => $value) {265             $sql = "SELECT a.attr_name FROM " . $ecs->table(‘attribute‘) . " AS a, " . $ecs->table(‘goods_attr‘) . " AS ga, " . $ecs->table(‘goods‘) . " AS g WHERE ($children OR " . get_extension_goods($children) . ") AND a.attr_id = ga.attr_id AND g.goods_id = ga.goods_id AND g.is_delete = 0 AND g.is_on_sale = 1 AND g.is_alone_sale = 1 AND a.attr_id=‘$value‘";266             if($temp_name = $db->getOne($sql)) {267                 //获取该属性名(主属性)268                 $all_attr_list[$key][‘filter_attr_name‘] = $temp_name;269270                 //获取该属性的所有子属性(子属性必须是有被商品在使用的,不然,不要将其显示出来)271                 //RETURN: Array ( [0] => Array ( [attr_id] => 185 [goods_id] => 167 [attr_value] => 灰色 ) [1] => Array ( [attr_id] => 185 [goods_id] => 198 [attr_value] => 白色 ) [2] => Array ( [attr_id] => 185 [goods_id] => 197 [attr_value] => 金色 ) [3] => Array ( [attr_id] => 185 [goods_id] => 163 [attr_value] => 黑色 ) )272                 $sql = "SELECT a.attr_id, MIN(a.goods_attr_id ) AS goods_id, a.attr_value AS attr_value FROM " . $ecs->table(‘goods_attr‘) . " AS a, " . $ecs->table(‘goods‘) .273                 " AS g" .274                 " WHERE ($children OR " . get_extension_goods($children) . ‘) AND g.goods_id = a.goods_id AND g.is_delete = 0 AND g.is_on_sale = 1 AND g.is_alone_sale = 1 ‘.275                 " AND a.attr_id=‘$value‘ ".276                 " GROUP BY a.attr_value";277                 $attr_list = $db->getAll($sql);278279                 //如果后台指定该分类下,用于搜索的属性的组数,是跟地址栏中filter_attr=0.0.0.0  中0的个数是一样的,而且顺序都是一样的280                 //第一个0,表示第一组属性中,它选择了哪一个子属性,以此类推281                 //获取当前url中已选择属性的值,并保留在数组中282                 //!这里要作循环,是因为避免属性为0或者空时,导致出错,因为直接把$filter_attr 赋值给 $temp_arrt_url_arr会出错。283                 //RETURN:Array ( [0] => 163 [1] => 216 [2] => 160 [3] => 186 ) 284                 $temp_arrt_url_arr = array();285                 for ($i = 0; $i < count($cat_filter_attr); $i++) {286                     $temp_arrt_url_arr[$i] = !empty($filter_attr[$i]) ? $filter_attr[$i] : 0;287                 }288289                 //这里是该属性下,选择全部时的数组形式290                 //哪一个属性的值为0,即说明用户选择的是该属性的全部选项291                 //为“全部”生成url292                 //DATA:Array ( [0] => 0 [1] => 216 [2] => 160 [3] => 186 ) 293                 $temp_arrt_url_arr[$key] = 0;    //“全部”的信息生成 294                 $temp_arrt_url = implode(‘.‘, $temp_arrt_url_arr);295                 $all_attr_list[$key][‘attr_list‘][0][‘attr_value‘] = $_LANG[‘all_attribute‘];296                 $all_attr_list[$key][‘attr_list‘][0][‘url‘] = build_uri(‘category‘, array(‘cid‘=>$cat_id, ‘bid‘=>$brand, ‘price_min‘=>$price_min, ‘price_max‘=>$price_max, ‘filter_attr‘=>$temp_arrt_url), $cat[‘cat_name‘]);297                 $all_attr_list[$key][‘attr_list‘][0][‘selected‘] = empty($filter_attr[$key]) ? 1 : 0;298299                 //循环计算子属性的相关数组:属性值,属性是否选择,属性的url300                 //判断当前子属性,是否被选中状态301                 //RETURN:Array ( [0] => Array ( [filter_attr_name] => 颜色 [attr_list] => Array ( [0] => Array ( [attr_value] => 全部 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=0.216.160.186 [selected] => 0 ) [1] => Array ( [attr_value] => 灰色 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=167.216.160.186 [selected] => 0 ) [2] => Array ( [attr_value] => 白色 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=198.216.160.186 [selected] => 0 ) [3] => Array ( [attr_value] => 金色 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=197.216.160.186 [selected] => 0 ) [4] => Array ( [attr_value] => 黑色 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 1 ) ) ) [1] => Array ( [filter_attr_name] => 屏幕大小 [attr_list] => Array ( [0] => Array ( [attr_value] => 全部 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.0.160.186 [selected] => 0 ) [1] => Array ( [attr_value] => 1.75英寸 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.229.160.186 [selected] => 0 ) [2] => Array ( [attr_value] => 2.0英寸 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 1 ) [3] => Array ( [attr_value] => 2.2英寸 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.223.160.186 [selected] => 0 ) [4] => Array ( [attr_value] => 2.6英寸 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.156.160.186 [selected] => 0 ) [5] => Array ( [attr_value] => 2.8英寸 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.200.160.186 [selected] => 0 ) ) ) [2] => Array ( [filter_attr_name] => 手机制式 [attr_list] => Array ( [0] => Array ( [attr_value] => 全部 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.0.186 [selected] => 0 ) [1] => Array ( [attr_value] => CDMA [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.202.186 [selected] => 0 ) [2] => Array ( [attr_value] => GSM,850,900,1800,1900 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 1 ) [3] => Array ( [attr_value] => GSM,900,1800,1900,2100 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.195.186 [selected] => 0 ) ) ) [3] => Array ( [filter_attr_name] => 外观样式 [attr_list] => Array ( [0] => Array ( [attr_value] => 全部 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.160.0 [selected] => 0 ) [1] => Array ( [attr_value] => 滑盖 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.160.199 [selected] => 0 ) [2] => Array ( [attr_value] => 直板 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 1 ) ) ) ) 302                 foreach ($attr_list as $k => $v) {303                     $temp_key = $k + 1;304                     $temp_arrt_url_arr[$key] = $v[‘goods_id‘];       //为url中代表当前筛选属性的位置变量赋值,并生成以‘.’分隔的筛选属性字符串305                     $temp_arrt_url = implode(‘.‘, $temp_arrt_url_arr);306307                     $all_attr_list[$key][‘attr_list‘][$temp_key][‘attr_value‘] = $v[‘attr_value‘];308                     $all_attr_list[$key][‘attr_list‘][$temp_key][‘url‘] = build_uri(‘category‘, array(‘cid‘=>$cat_id, ‘bid‘=>$brand, ‘price_min‘=>$price_min, ‘price_max‘=>$price_max, ‘filter_attr‘=>$temp_arrt_url), $cat[‘cat_name‘]);309310                     if (!empty($filter_attr[$key]) AND $filter_attr[$key] == $v[‘goods_id‘]) { //处理已被选择的子属性311                         $all_attr_list[$key][‘attr_list‘][$temp_key][‘selected‘] = 1;312                     }313                     else {314                         $all_attr_list[$key][‘attr_list‘][$temp_key][‘selected‘] = 0;315                     }316                 }317             }318         }319         //为模板注入变量320         $smarty->assign(‘filter_attr_list‘,  $all_attr_list);321322323         /* 扩展商品查询条件 */324         if (!empty($filter_attr)) {325             $ext_sql = "SELECT DISTINCT(b.goods_id) FROM " . $ecs->table(‘goods_attr‘) . " AS a, " . $ecs->table(‘goods_attr‘) . " AS b " .  "WHERE ";326             $ext_group_goods = array();327             foreach ($filter_attr AS $k => $v) { // 查出符合所有筛选属性条件的商品id */328                 if (is_numeric($v) && $v !=0 ) {329                     $sql = $ext_sql . "b.attr_value = http://www.mamicode.com/a.attr_value AND b.attr_id =" . $cat_filter_attr[$k] ." AND a.goods_attr_id = " . $v;330                     $ext_group_goods = $db->getColCached($sql);331                     $ext .= ‘ AND ‘ . db_create_in($ext_group_goods, ‘g.goods_id‘);332                 }333             }334         }335     }336     ///<<==================结束---商品属性处理==================///337338     //向模板,载入一些前台,必备的变量和常量339     assign_template(‘c‘, array($cat_id));340341     //RETURN:Array ( [title] => 夏新_GSM手机_手机类型_ECSHOP演示站 - Powered by ECShop [ur_here] => 首页 > 手机类型 > GSM手机 > 夏新 )342     $position = assign_ur_here($cat_id, $brand_name);343344     $smarty->assign(‘page_title‘,       $position[‘title‘]);    // 页面标题345     $smarty->assign(‘ur_here‘,          $position[‘ur_here‘]);  // 当前位置346347     $smarty->assign(‘categories‘,       get_categories_tree($cat_id)); // 分类树348     $smarty->assign(‘helps‘,            get_shop_help());              // 网店帮助349     $smarty->assign(‘top_goods‘,        get_top10());                  // 销售排行350     $smarty->assign(‘show_marketprice‘, $_CFG[‘show_marketprice‘]); //是否显示市场价351     $smarty->assign(‘category‘,         $cat_id);352     $smarty->assign(‘brand_id‘,         $brand);353     $smarty->assign(‘price_max‘,        $price_max);354     $smarty->assign(‘price_min‘,        $price_min);355     $smarty->assign(‘filter_attr‘,      $filter_attr_str);356     $smarty->assign(‘feed_url‘,         ($_CFG[‘rewrite‘] == 1) ? "feed-c$cat_id.xml" : ‘feed.php?cat=‘ . $cat_id); // RSS URL357358     if ($brand > 0) {359         $arr[‘all‘] = array(‘brand_id‘  => 0,360                 ‘brand_name‘    => $GLOBALS[‘_LANG‘][‘all_goods‘],361                 ‘brand_logo‘    => ‘‘,362                 ‘goods_num‘     => ‘‘,363                 ‘url‘           => build_uri(‘category‘, array(‘cid‘=>$cat_id), $cat[‘cat_name‘])364         );365     } else {366         $arr = array();367     }368369     $brand_list = array_merge($arr, get_brands($cat_id, ‘category‘));370     $smarty->assign(‘data_dir‘,    DATA_DIR); //网站data目录371     $smarty->assign(‘brand_list‘,      $brand_list);372     $smarty->assign(‘promotion_info‘, get_promotion_info()); //获取推荐信息373374     /* 调查 */375     $vote = get_vote();376     if (!empty($vote)) {377         $smarty->assign(‘vote_id‘,     $vote[‘id‘]);378         $smarty->assign(‘vote‘,        $vote[‘content‘]);379     }380381     //获取最热销、推荐和最热卖商品382     $smarty->assign(‘best_goods‘,      get_category_recommend_goods(‘best‘, $children, $brand, $price_min, $price_max, $ext));383     $smarty->assign(‘promotion_goods‘, get_category_recommend_goods(‘promote‘, $children, $brand, $price_min, $price_max, $ext));384     $smarty->assign(‘hot_goods‘,       get_category_recommend_goods(‘hot‘, $children, $brand, $price_min, $price_max, $ext));385     //获取该前状态下,商品的数量386     $count = get_cagtegory_goods_count($children, $brand, $price_min, $price_max, $ext);387     //最大页数388     $max_page = ($count> 0) ? ceil($count / $size) : 1;389     if ($page > $max_page) {390         $page = $max_page;391     }392393     //获取该栏目下的所有商品394     $goodslist = category_get_goods($children, $brand, $price_min, $price_max, $ext, $size, $page, $sort, $order);395396     //判断选择了列表还是图片方式显示方式397     if($display == ‘grid‘) {398         if(count($goodslist) % 2 != 0) {399             $goodslist[] = array();400         }401     }402403     $smarty->assign(‘goods_list‘,       $goodslist); //注入商品列表404     $smarty->assign(‘category‘,         $cat_id); //注入分类id405     $smarty->assign(‘script_name‘, ‘category‘); //注入该脚本的名称406407     assign_pager(‘category‘,            $cat_id, $count, $size, $sort, $order, $page, ‘‘, $brand, $price_min, $price_max, $display, $filter_attr_str); // 分页408     assign_dynamic(‘category‘); // 动态内容409 }410 $smarty->display(‘category.dwt‘, $cache_id);411 ?>
查看category.php全部代码

 

2.分步分析其实现过程:

1)第一步,首先,文件一开头,一定是接收前台页面发送过来的各种POST和GET参数了,这里主要还是指地址栏GET方式传过来的参数了。

 1 //====> 2.首先获取所有GET和POST中,可用于搜索的参数的值。 2 //====> 若没有此参数,则说明,并没有用此参数来搜索,默认要给它一个默认值。 3 /* 初始化分页信息 */ 4 $page = isset($_REQUEST[‘page‘])   && intval($_REQUEST[‘page‘])  > 0 ? intval($_REQUEST[‘page‘])  : 1; 5 $size = isset($_CFG[‘page_size‘])  && intval($_CFG[‘page_size‘]) > 0 ? intval($_CFG[‘page_size‘]) : 10; 6 $brand = isset($_REQUEST[‘brand‘]) && intval($_REQUEST[‘brand‘]) > 0 ? intval($_REQUEST[‘brand‘]) : 0; 7 $price_max = isset($_REQUEST[‘price_max‘]) && intval($_REQUEST[‘price_max‘]) > 0 ? intval($_REQUEST[‘price_max‘]) : 0; 8 $price_min = isset($_REQUEST[‘price_min‘]) && intval($_REQUEST[‘price_min‘]) > 0 ? intval($_REQUEST[‘price_min‘]) : 0; 9 $filter_attr_str = isset($_REQUEST[‘filter_attr‘]) ? htmlspecialchars(trim($_REQUEST[‘filter_attr‘])) : ‘0‘;10 $filter_attr_str = urldecode($filter_attr_str);11 $filter_attr = empty($filter_attr_str) ? ‘‘ : explode(‘.‘, trim($filter_attr_str));1213 /* 排序、显示方式以及类型 */14 $default_display_type = $_CFG[‘show_order_type‘] == ‘0‘ ? ‘list‘ : ($_CFG[‘show_order_type‘] == ‘1‘ ? ‘grid‘ : ‘text‘);15 $default_sort_order_method = $_CFG[‘sort_order_method‘] == ‘0‘ ? ‘DESC‘ : ‘ASC‘;16 $default_sort_order_type   = $_CFG[‘sort_order_type‘] == ‘0‘ ? ‘goods_id‘ : ($_CFG[‘sort_order_type‘] == ‘1‘ ? ‘shop_price‘ : ‘last_update‘);1718 $sort  = (isset($_REQUEST[‘sort‘])  && in_array(trim(strtolower($_REQUEST[‘sort‘])), array(‘goods_id‘, ‘shop_price‘, ‘last_update‘))) ? trim($_REQUEST[‘sort‘])  : $default_sort_order_type;19 $order = (isset($_REQUEST[‘order‘]) && in_array(trim(strtoupper($_REQUEST[‘order‘])), array(‘ASC‘, ‘DESC‘)))                              ? trim($_REQUEST[‘order‘]) : $default_sort_order_method;20 $display  = (isset($_REQUEST[‘display‘]) && in_array(trim(strtolower($_REQUEST[‘display‘])), array(‘list‘, ‘grid‘, ‘text‘))) ? trim($_REQUEST[‘display‘])  : (isset($_COOKIE[‘ECS‘][‘display‘]) ? $_COOKIE[‘ECS‘][‘display‘] : $default_display_type);21 $display  = in_array($display, array(‘list‘, ‘grid‘, ‘text‘)) ? $display : ‘text‘;22 setcookie(‘ECS[display]‘, $display, gmtime() + 86400 * 7);

 

2)第二步,处理商品分类参数,并获取该分类的详细信息:

 1 //====> 3.把该栏目下的所有子栏目id获取,如果没有子栏目,则是自身。 2 //===> TABLE:ecs_category 3 //====> RETURN:id=3 => g.cat_id IN (‘3‘)  或 id=6 => g.cat_id IN (‘6‘,‘8‘,‘9‘,‘11‘,‘7‘) 4 //====> 说明:ecshop的特点是,顶级栏目下也可以添加商品,所以会把顶级栏目id也放在数组里面 5 $children = get_children($cat_id); 6 7 //====> 4.获得该分类的相关信息。如:分类名称、价格分级、筛选属性、父id 8 //===> TABLE:ecs_category 9 //====> RETURN:Array ( [cat_name] => GSM手机 [keywords] => [cat_desc] => [style] => [grade] => 4 [filter_attr] => 185,189,173,178 [parent_id] => 1 )10 $cat = get_cat_info($cat_id);   
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3)第三步,处理价格,并对商品价格进行区间的划分:

  1 ///>>================开始---商品价格区间处理==================>>///  2 //===> 6.获取该分类cat的价格分级:  3 //===> ①如果价格分级=0,那么获取直接父类的价格分级。(Ⅰ如果父类价格也=0,那么就是不用价格分级 )  4 //===> ②如果价格分级!=0,那么就是自身的价格分级。  5 //===> TABLE:ecs_category  6 //===> RETURN:$cat[‘grade‘]=4  7 /* 获取价格分级 */  8 if ($cat[‘grade‘] == 0  && $cat[‘parent_id‘] != 0) { //  ==>如果价格分级为空,但是它还有上级分类,那么取直接上级的价格分级等数  9     $cat[‘grade‘] = get_parent_grade($cat_id); //如果当前分类级别为空,取最近的上级分类 10 } 11 12 //===> 7.对价格区间进行划分。 ecshop的划分方法,是根据算法来的,比较复杂。 13 //===> 如果价格分级>1,那么就执行价格区间划分 14 if ($cat[‘grade‘] > 1) { 15     /* 需要价格分级 */ 16 17     /* 18      算法思路: 19     1、当分级大于1时,进行价格分级 20     2、取出该类下商品价格的最大值、最小值 21     3、根据商品价格的最大值来计算商品价格的分级数量级: 22     价格范围(不含最大值)    分级数量级 23     0-0.1                   0.001 24     0.1-1                   0.01 25     1-10                    0.1 26     10-100                  1 27     100-1000                10 28     1000-10000              100 29     4、计算价格跨度: 30     取整((最大值-最小值) / (价格分级数) / 数量级) * 数量级 31     5、根据价格跨度计算价格范围区间 32     6、查询数据库 33 34     可能存在问题: 35     1、 36     由于价格跨度是由最大值、最小值计算出来的 37     然后再通过价格跨度来确定显示时的价格范围区间 38     所以可能会存在价格分级数量不正确的问题 39     该问题没有证明 40     2、 41     当价格=最大值时,分级会多出来,已被证明存在 42     */ 43 44     //===> 获得当前分类下商品价格的最大值、最小值 45     //===> 获得所有扩展分类属于指定分类的所有商品ID ,其中goods_id = 16的商品的扩展属于分类3 46     //===> TABLE:ecs_goods 和 ecs_goods_cat 47     //===> SQL:SELECT min(g.shop_price) AS min, max(g.shop_price) as max FROM `ecshop`.`ecs_goods` AS g WHERE (g.cat_id IN (‘5‘) OR g.goods_id IN (‘8‘,‘16‘) ) AND g.is_delete = 0 AND g.is_on_sale = 1 AND g.is_alone_sale = 1 48     //===> RETURN:Array ( [min] => 280.00 [max] => 5999.00 )  49     $sql = "SELECT min(g.shop_price) AS min, max(g.shop_price) as max ". 50             " FROM " . $ecs->table(‘goods‘). " AS g ". 51             " WHERE ($children OR " . get_extension_goods($children) . ‘) AND g.is_delete = 0 AND g.is_on_sale = 1 AND g.is_alone_sale = 1  ‘; 52     $row = $db->getRow($sql); 53 54 55     //===> 按照公式计算出最低价格和最高价格、以及价格跨度 56     //===============↓↓↓先不做讨论=============== 57     // 取得价格分级最小单位级数,比如,千元商品最小以100为级数 58     $price_grade = 0.0001; 59     for($i=-2; $i<= log10($row[‘max‘]); $i++) { 60         $price_grade *= 10; 61     } 62 63     //价格跨度 64     $dx = ceil(($row[‘max‘] - $row[‘min‘]) / ($cat[‘grade‘]) / $price_grade) * $price_grade; 65     if($dx == 0) { 66         $dx = $price_grade; 67     } 68 69     for($i = 1; $row[‘min‘] > $dx * $i; $i ++); 70 71         for($j = 1; $row[‘min‘] > $dx * ($i-1) + $price_grade * $j; $j++); 72         $row[‘min‘] = $dx * ($i-1) + $price_grade * ($j - 1); 73 74         for(; $row[‘max‘] >= $dx * $i; $i ++); 75         $row[‘max‘] = $dx * ($i) + $price_grade * ($j - 1); 76 77         //===>这里打印最高价格和最低价格:$row=>Array ( [min] => 200 [max] => 6200 ) 78         //===>这里打印价格跨度:$dx = 1500 79 80         //===============先不做讨论↑↑↑==================// 81 82 83         //===> 根据商品的价格、价格区间的最低价格、以及价格跨度,计算该商品价格属于哪一个区间内。 84         //===> 获取属于该价格区间内的商品的数量、获取sn则属于哪一个区间sn=0为200-1700、sn=1为1700-3200、sn=3为4700-6200。 85         //===> 因为没有商品价格属于第二区间,则不存在sn=2,那么3200-4700则没有任何商品 86         //===> TABLE:ecs_goods 和 ecs_goods_cat 87         //===> SQL:SELECT (FLOOR((g.shop_price - 200) / 1500)) AS sn, COUNT(*) AS goods_num FROM `ecshop`.`ecs_goods` AS g WHERE (g.cat_id IN (‘3‘) OR g.goods_id IN (‘16‘) ) AND g.is_delete = 0 AND g.is_on_sale = 1 AND g.is_alone_sale = 1 GROUP BY sn 88         //===>RETURN:Array ( [0] => Array ( [sn] => 0 [goods_num] => 6 ) [1] => Array ( [sn] => 1 [goods_num] => 5 ) [2] => Array ( [sn] => 3 [goods_num] => 1 ) )  89         $sql = "SELECT (FLOOR((g.shop_price - $row[min]) / $dx)) AS sn, COUNT(*) AS goods_num  ". 90                 " FROM " . $ecs->table(‘goods‘) . " AS g ". 91                 " WHERE ($children OR " . get_extension_goods($children) . ‘) AND g.is_delete = 0 AND g.is_on_sale = 1 AND g.is_alone_sale = 1 ‘. 92                 " GROUP BY sn "; 93         $price_grade = $db->getAll($sql); 94 95 96         //===> 根据价格等级price_grade,计算真正的价格区间。 97         //===> 方法build_uri()重要:要为每一个价格区间,生成一个url超链接,以备前台点击搜索用 98         //===> 并根据价格参数,判断该区间,是否是当前被搜索的区间 99         //===> 把价格区间,注入模板,供前台使用100         //===> RETURN:Array ( [0] => Array ( [sn] => 0 [goods_num] => 6 [start] => 0 [end] => 0 [price_range] => 全部 [url] => category.php?id=3&brand=1&price_min=0&price_max=0&filter_attr=163.216.160.186 [selected] => 0 ) [1] => Array ( [sn] => 1 [goods_num] => 6 [start] => 200 [end] => 1700 [price_range] => 200 - 1700 [formated_start] => ¥200元 [formated_end] => ¥1700元 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 1 ) [2] => Array ( [sn] => 3 [goods_num] => 5 [start] => 1700 [end] => 3200 [price_range] => 1700 - 3200 [formated_start] => ¥1700元 [formated_end] => ¥3200元 [url] => category.php?id=3&brand=1&price_min=1700&price_max=3200&filter_attr=163.216.160.186 [selected] => 0 ) [3] => Array ( [goods_num] => 1 [start] => 4700 [end] => 6200 [price_range] => 4700 - 6200 [formated_start] => ¥4700元 [formated_end] => ¥6200元 [url] => category.php?id=3&brand=1&price_min=4700&price_max=6200&filter_attr=163.216.160.186 [selected] => 0 ) ) 101         foreach ($price_grade as $key=>$val) {102             $temp_key = $key + 1;103             $price_grade[$temp_key][‘goods_num‘] = $val[‘goods_num‘];104             $price_grade[$temp_key][‘start‘] = $row[‘min‘] + round($dx * $val[‘sn‘]);105             $price_grade[$temp_key][‘end‘] = $row[‘min‘] + round($dx * ($val[‘sn‘] + 1));106             $price_grade[$temp_key][‘price_range‘] = $price_grade[$temp_key][‘start‘] . ‘&nbsp;-&nbsp;‘ . $price_grade[$temp_key][‘end‘];107             $price_grade[$temp_key][‘formated_start‘] = price_format($price_grade[$temp_key][‘start‘]);108             $price_grade[$temp_key][‘formated_end‘] = price_format($price_grade[$temp_key][‘end‘]);109             $price_grade[$temp_key][‘url‘] = build_uri(‘category‘, array(‘cid‘=>$cat_id, ‘bid‘=>$brand, ‘price_min‘=>$price_grade[$temp_key][‘start‘], ‘price_max‘=> $price_grade[$temp_key][‘end‘], ‘filter_attr‘=>$filter_attr_str), $cat[‘cat_name‘]);110             /* 判断价格区间是否被选中 */111             if (isset($_REQUEST[‘price_min‘]) && $price_grade[$temp_key][‘start‘] == $price_min && $price_grade[$temp_key][‘end‘] == $price_max) {112                 $price_grade[$temp_key][‘selected‘] = 1;113             }114             else {115                 $price_grade[$temp_key][‘selected‘] = 0;116             }117         }118         //补充一个选择全部的类型的数组119         $price_grade[0][‘start‘] = 0;120         $price_grade[0][‘end‘] = 0;121         $price_grade[0][‘price_range‘] = $_LANG[‘all_attribute‘];122         $price_grade[0][‘url‘] = build_uri(‘category‘, array(‘cid‘=>$cat_id, ‘bid‘=>$brand, ‘price_min‘=>0, ‘price_max‘=> 0, ‘filter_attr‘=>$filter_attr_str), $cat[‘cat_name‘]);123         $price_grade[0][‘selected‘] = empty($price_max) ? 1 : 0;124         //把价格区间数组,注入模板文件125         $smarty->assign(‘price_grade‘,     $price_grade);126     }127     ///<<================结束---商品价格区间处理==================<<///128     
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4)第四步,处理品牌,并为每一个品牌生成url。

 1 ///>>================开始---商品品牌处理==================>>/// 2     //====> ???db_create_in(array_unique(array_merge(array($cat_id), array_keys(cat_list($cat_id, 0, false))))) . ") 3     //===> 品牌筛选功能:把该栏目下(其中包括扩展分类下的商品),所有商品的品牌获取,但不能重复。 4     //===> 品牌下有商品并且商品状态正常,才能把该品牌取出。没有商品的品牌不能取出 5     //===> TABLE:ecs_brand、ecs_goods 和 ecs_goods_cat 6     //===> SQL:SELECT b.brand_id, b.brand_name, COUNT(*) AS goods_num FROM `ecshop`.`ecs_brand`AS b, `ecshop`.`ecs_goods` AS g LEFT JOIN `ecshop`.`ecs_goods_cat` AS gc ON g.goods_id = gc.goods_id WHERE g.brand_id = b.brand_id AND (g.cat_id IN (‘3‘) OR gc.cat_id IN (‘3‘) ) AND b.is_show = 1 AND g.is_on_sale = 1 AND g.is_alone_sale = 1 AND g.is_delete = 0 GROUP BY b.brand_id HAVING goods_num > 0 ORDER BY b.sort_order, b.brand_id ASC 7     //===> RETURN:Array ( [0] => Array ( [brand_id] => 1 [brand_name] => 诺基亚 [goods_num] => 3 ) [1] => Array ( [brand_id] => 2 [brand_name] => 摩托罗拉 [goods_num] => 1 ) [2] => Array ( [brand_id] => 3 [brand_name] => 多普达 [goods_num] => 1 ) [3] => Array ( [brand_id] => 4 [brand_name] => 飞利浦 [goods_num] => 2 ) [4] => Array ( [brand_id] => 5 [brand_name] => 夏新 [goods_num] => 1 ) [5] => Array ( [brand_id] => 6 [brand_name] => 三星 [goods_num] => 2 ) [6] => Array ( [brand_id] => 7 [brand_name] => 索爱 [goods_num] => 1 ) [7] => Array ( [brand_id] => 9 [brand_name] => 联想 [goods_num] => 1 ) [8] => Array ( [brand_id] => 10 [brand_name] => 金立 [goods_num] => 1 ) )  8     /* 品牌筛选 */ 9     $sql = "SELECT b.brand_id, b.brand_name, COUNT(*) AS goods_num ".10             "FROM " . $GLOBALS[‘ecs‘]->table(‘brand‘) . "AS b, ".11             $GLOBALS[‘ecs‘]->table(‘goods‘) . " AS g LEFT JOIN ". $GLOBALS[‘ecs‘]->table(‘goods_cat‘) . " AS gc ON g.goods_id = gc.goods_id " .12             "WHERE g.brand_id = b.brand_id AND ($children OR " . ‘gc.cat_id ‘ . db_create_in(array_unique(array_merge(array($cat_id), array_keys(cat_list($cat_id, 0, false))))) . ") AND b.is_show = 1 " .13             " AND g.is_on_sale = 1 AND g.is_alone_sale = 1 AND g.is_delete = 0 ".14             "GROUP BY b.brand_id HAVING goods_num > 0 ORDER BY b.sort_order, b.brand_id ASC";15     $brands = $GLOBALS[‘db‘]->getAll($sql);1617     //===> 把该分类下所有商品的品牌,组合成数组,给前台调用18     //===> 方法build_uri()重要:要为每品牌,生成一个url超链接,以备前台点击搜索用19     //===> 把数组注入模板文件20     //====! 这样一种组织数组的方式,有它的缺陷:就是说不能够把每一个品牌下面的,商品的数量保存下来,同时也会有一些无用的数据,掺杂其中。21     //RETURN:Array ( [0] => Array ( [brand_id] => 1 [brand_name] => 全部 [goods_num] => 3 [url] => category.php?id=3&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 0 ) [1] => Array ( [brand_id] => 2 [brand_name] => 诺基亚 [goods_num] => 1 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 1 ) [2] => Array ( [brand_id] => 3 [brand_name] => 摩托罗拉 [goods_num] => 1 [url] => category.php?id=3&brand=2&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 0 ) [3] => Array ( [brand_id] => 4 [brand_name] => 多普达 [goods_num] => 2 [url] => category.php?id=3&brand=3&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 0 ) [4] => Array ( [brand_id] => 5 [brand_name] => 飞利浦 [goods_num] => 1 [url] => category.php?id=3&brand=4&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 0 ) [5] => Array ( [brand_id] => 6 [brand_name] => 夏新 [goods_num] => 2 [url] => category.php?id=3&brand=5&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 0 ) [6] => Array ( [brand_id] => 7 [brand_name] => 三星 [goods_num] => 1 [url] => category.php?id=3&brand=6&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 0 ) [7] => Array ( [brand_id] => 9 [brand_name] => 索爱 [goods_num] => 1 [url] => category.php?id=3&brand=7&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 0 ) [8] => Array ( [brand_id] => 10 [brand_name] => 联想 [goods_num] => 1 [url] => category.php?id=3&brand=9&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 0 ) [9] => Array ( [brand_name] => 金立 [url] => category.php?id=3&brand=10&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 0 ) ) 22     foreach ($brands AS $key => $val) {23         $temp_key = $key + 1;24         $brands[$temp_key][‘brand_name‘] = $val[‘brand_name‘];25         $brands[$temp_key][‘url‘] = build_uri(‘category‘, array(‘cid‘ => $cat_id, ‘bid‘ => $val[‘brand_id‘], ‘price_min‘=>$price_min, ‘price_max‘=> $price_max, ‘filter_attr‘=>$filter_attr_str), $cat[‘cat_name‘]);26         /* 判断品牌是否被选中 */27         if ($brand == $brands[$key][‘brand_id‘]) {28             $brands[$temp_key][‘selected‘] = 1;29         } else {30             $brands[$temp_key][‘selected‘] = 0;31         }32     }33     //补充一个选择全部品牌的数组34     $brands[0][‘brand_name‘] = $_LANG[‘all_attribute‘];35     $brands[0][‘url‘] = build_uri(‘category‘, array(‘cid‘ => $cat_id, ‘bid‘ => 0, ‘price_min‘=>$price_min, ‘price_max‘=> $price_max, ‘filter_attr‘=>$filter_attr_str), $cat[‘cat_name‘]);36     $brands[0][‘selected‘] = empty($brand) ? 1 : 0;37     //把品牌数组注入模板38     $smarty->assign(‘brands‘, $brands);39     ///<<==================结束---商品品牌处理==================<<///
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5)第五步,处理商品的属性,并为每一个属性生成url。

 1 ///>>==================开始---商品属性处理==================>>/// 2     /* 属性筛选 */ 3     $ext = ‘‘; //商品查询条件扩展 4     if ($cat[‘filter_attr‘] > 0) { 5         //===>需要筛选的属性,是人工在后台添加的,存放在ecs_category 表的中 filter_attr字段里面,格式如:185,189,120,190 6         //===>RETURN:Array ( [0] => 185 [1] => 189 [2] => 173 [3] => 178 ) 7         $cat_filter_attr = explode(‘,‘, $cat[‘filter_attr‘]);       //提取出此分类的筛选属性 8 9         //===> 然后,对每一个属性(此属性是主属性,下面还有子属性),循环进行操作10         //===> ①获取该属性的属性名11         //===> ②获取该属性的所有子属性(子属性必须是有被商品在使用的,不然,不要将其显示出来)12         //===> 意义:因为该属性涉及到搜索参数,如果该属性下本身没有商品,那么就没有显示出来的意义了。13         //===> RETURN: Array ( [0] => Array ( [attr_id] => 185 [goods_id] => 167 [attr_value] => 灰色 ) [1] => Array ( [attr_id] => 185 [goods_id] => 198 [attr_value] => 白色 ) [2] => Array ( [attr_id] => 185 [goods_id] => 197 [attr_value] => 金色 ) [3] => Array ( [attr_id] => 185 [goods_id] => 163 [attr_value] => 黑色 ) ) 14         $all_attr_list = array();15         foreach ($cat_filter_attr AS $key => $value) {16             $sql = "SELECT a.attr_name FROM " . $ecs->table(‘attribute‘) . " AS a, " . $ecs->table(‘goods_attr‘) . " AS ga, " . $ecs->table(‘goods‘) . " AS g WHERE ($children OR " . get_extension_goods($children) . ") AND a.attr_id = ga.attr_id AND g.goods_id = ga.goods_id AND g.is_delete = 0 AND g.is_on_sale = 1 AND g.is_alone_sale = 1 AND a.attr_id=‘$value‘";17             if($temp_name = $db->getOne($sql)) {18                 //获取该属性名(主属性)19                 $all_attr_list[$key][‘filter_attr_name‘] = $temp_name;2021                 //获取该属性的所有子属性(子属性必须是有被商品在使用的,不然,不要将其显示出来)22                 //RETURN: Array ( [0] => Array ( [attr_id] => 185 [goods_id] => 167 [attr_value] => 灰色 ) [1] => Array ( [attr_id] => 185 [goods_id] => 198 [attr_value] => 白色 ) [2] => Array ( [attr_id] => 185 [goods_id] => 197 [attr_value] => 金色 ) [3] => Array ( [attr_id] => 185 [goods_id] => 163 [attr_value] => 黑色 ) )23                 $sql = "SELECT a.attr_id, MIN(a.goods_attr_id ) AS goods_id, a.attr_value AS attr_value FROM " . $ecs->table(‘goods_attr‘) . " AS a, " . $ecs->table(‘goods‘) .24                 " AS g" .25                 " WHERE ($children OR " . get_extension_goods($children) . ‘) AND g.goods_id = a.goods_id AND g.is_delete = 0 AND g.is_on_sale = 1 AND g.is_alone_sale = 1 ‘.26                 " AND a.attr_id=‘$value‘ ".27                 " GROUP BY a.attr_value";28                 $attr_list = $db->getAll($sql);2930                 //如果后台指定该分类下,用于搜索的属性的组数,是跟地址栏中filter_attr=0.0.0.0  中0的个数是一样的,而且顺序都是一样的31                 //第一个0,表示第一组属性中,它选择了哪一个子属性,以此类推32                 //获取当前url中已选择属性的值,并保留在数组中33                 //!这里要作循环,是因为避免属性为0或者空时,导致出错,因为直接把$filter_attr 赋值给 $temp_arrt_url_arr会出错。34                 //RETURN:Array ( [0] => 163 [1] => 216 [2] => 160 [3] => 186 ) 35                 $temp_arrt_url_arr = array();36                 for ($i = 0; $i < count($cat_filter_attr); $i++) {37                     $temp_arrt_url_arr[$i] = !empty($filter_attr[$i]) ? $filter_attr[$i] : 0;38                 }3940                 //这里是该属性下,选择全部时的数组形式41                 //哪一个属性的值为0,即说明用户选择的是该属性的全部选项42                 //为“全部”生成url43                 //DATA:Array ( [0] => 0 [1] => 216 [2] => 160 [3] => 186 ) 44                 $temp_arrt_url_arr[$key] = 0;    //“全部”的信息生成 45                 $temp_arrt_url = implode(‘.‘, $temp_arrt_url_arr);46                 $all_attr_list[$key][‘attr_list‘][0][‘attr_value‘] = $_LANG[‘all_attribute‘];47                 $all_attr_list[$key][‘attr_list‘][0][‘url‘] = build_uri(‘category‘, array(‘cid‘=>$cat_id, ‘bid‘=>$brand, ‘price_min‘=>$price_min, ‘price_max‘=>$price_max, ‘filter_attr‘=>$temp_arrt_url), $cat[‘cat_name‘]);48                 $all_attr_list[$key][‘attr_list‘][0][‘selected‘] = empty($filter_attr[$key]) ? 1 : 0;4950                 //循环计算子属性的相关数组:属性值,属性是否选择,属性的url51                 //判断当前子属性,是否被选中状态52                 //RETURN:Array ( [0] => Array ( [filter_attr_name] => 颜色 [attr_list] => Array ( [0] => Array ( [attr_value] => 全部 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=0.216.160.186 [selected] => 0 ) [1] => Array ( [attr_value] => 灰色 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=167.216.160.186 [selected] => 0 ) [2] => Array ( [attr_value] => 白色 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=198.216.160.186 [selected] => 0 ) [3] => Array ( [attr_value] => 金色 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=197.216.160.186 [selected] => 0 ) [4] => Array ( [attr_value] => 黑色 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 1 ) ) ) [1] => Array ( [filter_attr_name] => 屏幕大小 [attr_list] => Array ( [0] => Array ( [attr_value] => 全部 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.0.160.186 [selected] => 0 ) [1] => Array ( [attr_value] => 1.75英寸 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.229.160.186 [selected] => 0 ) [2] => Array ( [attr_value] => 2.0英寸 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 1 ) [3] => Array ( [attr_value] => 2.2英寸 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.223.160.186 [selected] => 0 ) [4] => Array ( [attr_value] => 2.6英寸 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.156.160.186 [selected] => 0 ) [5] => Array ( [attr_value] => 2.8英寸 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.200.160.186 [selected] => 0 ) ) ) [2] => Array ( [filter_attr_name] => 手机制式 [attr_list] => Array ( [0] => Array ( [attr_value] => 全部 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.0.186 [selected] => 0 ) [1] => Array ( [attr_value] => CDMA [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.202.186 [selected] => 0 ) [2] => Array ( [attr_value] => GSM,850,900,1800,1900 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 1 ) [3] => Array ( [attr_value] => GSM,900,1800,1900,2100 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.195.186 [selected] => 0 ) ) ) [3] => Array ( [filter_attr_name] => 外观样式 [attr_list] => Array ( [0] => Array ( [attr_value] => 全部 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.160.0 [selected] => 0 ) [1] => Array ( [attr_value] => 滑盖 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.160.199 [selected] => 0 ) [2] => Array ( [attr_value] => 直板 [url] => category.php?id=3&brand=1&price_min=200&price_max=1700&filter_attr=163.216.160.186 [selected] => 1 ) ) ) ) 53                 foreach ($attr_list as $k => $v) {54                     $temp_key = $k + 1;55                     $temp_arrt_url_arr[$key] = $v[‘goods_id‘];       //为url中代表当前筛选属性的位置变量赋值,并生成以‘.’分隔的筛选属性字符串56                     $temp_arrt_url = implode(‘.‘, $temp_arrt_url_arr);5758                     $all_attr_list[$key][‘attr_list‘][$temp_key][‘attr_value‘] = $v[‘attr_value‘];59                     $all_attr_list[$key][‘attr_list‘][$temp_key][‘url‘] = build_uri(‘category‘, array(‘cid‘=>$cat_id, ‘bid‘=>$brand, ‘price_min‘=>$price_min, ‘price_max‘=>$price_max, ‘filter_attr‘=>$temp_arrt_url), $cat[‘cat_name‘]);6061                     if (!empty($filter_attr[$key]) AND $filter_attr[$key] == $v[‘goods_id‘]) { //处理已被选择的子属性62                         $all_attr_list[$key][‘attr_list‘][$temp_key][‘selected‘] = 1;63                     }64                     else {65                         $all_attr_list[$key][‘attr_list‘][$temp_key][‘selected‘] = 0;66                     }67                 }68             }69         }70         //为模板注入变量71         $smarty->assign(‘filter_attr_list‘,  $all_attr_list);727374         /* 扩展商品查询条件 */75         if (!empty($filter_attr)) {76             $ext_sql = "SELECT DISTINCT(b.goods_id) FROM " . $ecs->table(‘goods_attr‘) . " AS a, " . $ecs->table(‘goods_attr‘) . " AS b " .  "WHERE ";77             $ext_group_goods = array();78             foreach ($filter_attr AS $k => $v) { // 查出符合所有筛选属性条件的商品id */79                 if (is_numeric($v) && $v !=0 ) {80                     $sql = $ext_sql . "b.attr_value = http://www.mamicode.com/a.attr_value AND b.attr_id =" . $cat_filter_attr[$k] ." AND a.goods_attr_id = " . $v;81                     $ext_group_goods = $db->getColCached($sql);82                     $ext .= ‘ AND ‘ . db_create_in($ext_group_goods, ‘g.goods_id‘);83                 }84             }85         }86     }87     ///<<==================结束---商品属性处理==================///
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6)第六步,根据以上计算的条件,查询商品列表,并计算商品的数量等等,把变量注入模板中去。

 1 //向模板,载入一些前台,必备的变量和常量 2     assign_template(‘c‘, array($cat_id)); 3 4     //RETURN:Array ( [title] => 夏新_GSM手机_手机类型_ECSHOP演示站 - Powered by ECShop [ur_here] => 首页 > 手机类型 > GSM手机 > 夏新 ) 5     $position = assign_ur_here($cat_id, $brand_name); 6 7     $smarty->assign(‘page_title‘,       $position[‘title‘]);    // 页面标题 8     $smarty->assign(‘ur_here‘,          $position[‘ur_here‘]);  // 当前位置 910     $smarty->assign(‘categories‘,       get_categories_tree($cat_id)); // 分类树11     $smarty->assign(‘helps‘,            get_shop_help());              // 网店帮助12     $smarty->assign(‘top_goods‘,        get_top10());                  // 销售排行13     $smarty->assign(‘show_marketprice‘, $_CFG[‘show_marketprice‘]); //是否显示市场价14     $smarty->assign(‘category‘,         $cat_id);15     $smarty->assign(‘brand_id‘,         $brand);16     $smarty->assign(‘price_max‘,        $price_max);17     $smarty->assign(‘price_min‘,        $price_min);18     $smarty->assign(‘filter_attr‘,      $filter_attr_str);19     $smarty->assign(‘feed_url‘,         ($_CFG[‘rewrite‘] == 1) ? "feed-c$cat_id.xml" : ‘feed.php?cat=‘ . $cat_id); // RSS URL2021     if ($brand > 0) {22         $arr[‘all‘] = array(‘brand_id‘  => 0,23                 ‘brand_name‘    => $GLOBALS[‘_LANG‘][‘all_goods‘],24                 ‘brand_logo‘    => ‘‘,25                 ‘goods_num‘     => ‘‘,26                 ‘url‘           => build_uri(‘category‘, array(‘cid‘=>$cat_id), $cat[‘cat_name‘])27         );28     } else {29         $arr = array();30     }3132     $brand_list = array_merge($arr, get_brands($cat_id, ‘category‘));33     $smarty->assign(‘data_dir‘,    DATA_DIR); //网站data目录34     $smarty->assign(‘brand_list‘,      $brand_list);35     $smarty->assign(‘promotion_info‘, get_promotion_info()); //获取推荐信息3637     /* 调查 */38     $vote = get_vote();39     if (!empty($vote)) {40         $smarty->assign(‘vote_id‘,     $vote[‘id‘]);41         $smarty->assign(‘vote‘,        $vote[‘content‘]);42     }4344     //获取最热销、推荐和最热卖商品45     $smarty->assign(‘best_goods‘,      get_category_recommend_goods(‘best‘, $children, $brand, $price_min, $price_max, $ext));46     $smarty->assign(‘promotion_goods‘, get_category_recommend_goods(‘promote‘, $children, $brand, $price_min, $price_max, $ext));47     $smarty->assign(‘hot_goods‘,       get_category_recommend_goods(‘hot‘, $children, $brand, $price_min, $price_max, $ext));48     //获取该前状态下,商品的数量49     $count = get_cagtegory_goods_count($children, $brand, $price_min, $price_max, $ext);50     //最大页数51     $max_page = ($count> 0) ? ceil($count / $size) : 1;52     if ($page > $max_page) {53         $page = $max_page;54     }5556     //获取该栏目下的所有商品57     $goodslist = category_get_goods($children, $brand, $price_min, $price_max, $ext, $size, $page, $sort, $order);5859     //判断选择了列表还是图片方式显示方式60     if($display == ‘grid‘) {61         if(count($goodslist) % 2 != 0) {62             $goodslist[] = array();63         }64     }6566     $smarty->assign(‘goods_list‘,       $goodslist); //注入商品列表67     $smarty->assign(‘category‘,         $cat_id); //注入分类id68     $smarty->assign(‘script_name‘, ‘category‘); //注入该脚本的名称6970     assign_pager(‘category‘,            $cat_id, $count, $size, $sort, $order, $page, ‘‘, $brand, $price_min, $price_max, $display, $filter_attr_str); // 分页71     assign_dynamic(‘category‘); // 动态内容72 }73 $smarty->display(‘category.dwt‘, $cache_id);
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说明:以上的代码中,都有对其实现方法,有非常具体的说明,详情请见代码的备注。

 

 

总结:分析都最后,其实我有些些失望了,因为这个所谓多条件搜索功能的实现,并不算是很复杂,很高深的东西,都比较简单(和我的想法差不多)。

不过,我也学到了一些东西,具体如下:

① 对Ecshop商品主要数据表的设计有了了解。(下一篇会简单介绍)

② 原来这里的要对商品的那些属性进行筛选,并不是程序自动处理,而是管理员后台指定的。

③ 价格区间的计算,是按照一定的算法计算出来的,比较智能,但数字不太好看(另外一种策略,是自己后台为每一个商品分类,都指定一个价格区间,也是可以的。)

④ 品牌、价格区间和属性,都是按照一定的原则从数据库抽取出来的。即,这些说有的分类或者属性下,必须是有商品的,才会把它获取出来。比如,如果颜色为黑色的属性下面是没有任何商品的,那么黑色这个属性,就不应该显示出来。其他依次类推。

⑤ 对于一些较为复杂的mysql语句查询,有了一些了解(希望不断提高啦。。)

 

以上,是小弟做的一些小小的分析和总结,我经验还不丰富啊,有哪一些不对的地方和不足,希望大家指正,我会虚心学习和接受,谢谢啦!!

Ecshop的商品筛选功能实现分析之一(主要对category.php进行分析)