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php瀑布流，把一个数组分4个数组，按照时间排序
简单介绍：把一个数组分成4个数组，取其中1的倍数
<?php$arr = array( ‘0‘ => ‘0‘, ‘1‘ => ‘1‘, ‘2‘ => ‘2‘, ‘3‘ => ‘3‘, ‘4‘ => ‘4‘, ‘5‘ => ‘5‘, ‘6‘ => ‘6‘, ‘7‘ => ‘7‘, ‘8‘ => ‘8‘, ‘9‘ => ‘9‘, ‘10‘ => ‘10‘, ‘11‘ => ‘11‘, ‘12‘ => ‘12‘, );
foreach($arr as $k=>$val){
for($i=0;$i<4;$i++){
$a = $i*4+1; // 其中的1是倍数，可以是0、1、2、3不能超过4；如果是7，则$i<7;
if($k==$a){
$item[] = $val;
}
}
}
?>
输出结果
Array ( [0] => 1 [1] => 5 [2] => 9 );
简单介绍：把一个数组分成4个数组，取其中3的倍数
<?php$arr = array( ‘0‘ => ‘0‘, ‘1‘ => ‘1‘, ‘2‘ => ‘2‘, ‘3‘ => ‘3‘, ‘4‘ => ‘4‘, ‘5‘ => ‘5‘, ‘6‘ => ‘6‘, ‘7‘ => ‘7‘, ‘8‘ => ‘8‘, ‘9‘ => ‘9‘, ‘10‘ => ‘10‘, ‘11‘ => ‘11‘, ‘12‘ => ‘12‘, );foreach($arr as $k=>$val){ for($i=0;$i<4;$i++){ $a = $i*4+1; // 其中的1是倍数，可以是0、1、2、3不能超过4；如果是7，则$i<7; if($k==$a){ $item[] = $val; } }}?>输出结果Array ( [0] => 3 [1] => 7 [2] => 11 )
与数据库结合
class IndexAction extends BaseAction{ public function index() { $m = M(‘article‘); $res = $m->select(); $f = $this->d($res,2); print_r($f); } public function d($arr,$v){ foreach($arr as $k=>$val){ for($i=0;$i<4;$i++){ $a = $i*4+$v; if($k==$a){ $item[] = $val; } } } return $item; } }
输出结果
Array ( [0] => Array ( [id] => 3 [catid] => 1 [userid] => 1 [username] => yourphp [title] => 欧美风2014夏新款韩国名媛精致复合提花拼纱荷叶袖连衣裙 [title_style] => [keywords] => [copyfrom] => [fromlink] => [description] => 欧美风2014夏新款韩国名媛精致复合提花拼纱荷叶袖连衣裙 [content] => 欧美风2014夏新款韩国名媛精致复合提花拼纱荷叶袖连衣裙 [template] => 0 [thumb] => /b/Uploads/201407/53d220e49655a.jpg [posid] => 0 [status] => 1 [recommend] => 1 [readgroup] => [readpoint] => 0 [listorder] => 0 [url] => /b/index.php?m=Article&a=show&id=3 [hits] => 0 [createtime] => 1406279913 [updatetime] => 1406279913 [name] => [lang] => 1 ) )
实例分析：瀑布流
<div> <ul> <!--第一列--> <li></li> <!--第二列--> <li></li> <!--第三列--> <li></li> <!--第四列--> <li></li> </ul></div>
html代码
<!-- screeenA瀑布流 --> <div class="screenA"> <ul> <li> <volist name="arr_0" id="vo"> <div class="ka"> <div class="im"> <img src=http://www.mamicode.com/"{$vo.thumb}" /> </div> <div class="text"><a href=http://www.mamicode.com/"{$vo.url}">{$vo.title}</a></div> <div class="t_bot"><div class="zan" style="float:left"><span>赞 325</span></div><div class="liulan">浏览(365635)</div></div> <div class="line"></div> <div class="ask"> <div class="ask_left"><img src=http://www.mamicode.com/"../Public/images/ico_03.jpg" /></div> <div class="ask_rig"><h3>星空下的骑士</h3><span>连体短裤是夏季最凉快和轻便的着装，简单风格</span></div> <div class="clear"></div> </div> </div> </volist> </li> <li> <volist name="arr_1" id="vo"> <div class="ka"> <div class="im"> <img src=http://www.mamicode.com/"{$vo.thumb}" /> </div> <div class="text"><a href=http://www.mamicode.com/"{$vo.url}">{$vo.title}</a></div> <div class="t_bot"><div class="zan" style="float:left"><span>赞 325</span></div><div class="liulan">浏览(365635)</div></div> <div class="line"></div> <div class="ask"> <div class="ask_left"><img src=http://www.mamicode.com/"../Public/images/ico_03.jpg" /></div> <div class="ask_rig"><h3>星空下的骑士</h3><span>连体短裤是夏季最凉快和轻便的着装，简单风格</span></div> <div class="clear"></div> </div> </div> </volist> </li> <li> <volist name="arr_2" id="vo"> <div class="ka"> <div class="im"> <img src=http://www.mamicode.com/"{$vo.thumb}" /> </div> <div class="text"><a href=http://www.mamicode.com/"{$vo.url}">{$vo.title}</a></div> <div class="t_bot"><div class="zan" style="float:left"><span>赞 325</span></div><div class="liulan">浏览(365635)</div></div> <div class="line"></div> <div class="ask"> <div class="ask_left"><img src=http://www.mamicode.com/"../Public/images/ico_03.jpg" /></div> <div class="ask_rig"><h3>星空下的骑士</h3><span>连体短裤是夏季最凉快和轻便的着装，简单风格</span></div> <div class="clear"></div> </div> </div> </volist> </li> <li> <volist name="arr_3" id="vo"> <div class="ka"> <div class="im"> <img src=http://www.mamicode.com/"{$vo.thumb}" /> </div> <div class="text"><a href=http://www.mamicode.com/"{$vo.url}">{$vo.title}</a></div> <div class="t_bot"><div class="zan" style="float:left"><span>赞 325</span></div><div class="liulan">浏览(365635)</div></div> <div class="line"></div> <div class="ask"> <div class="ask_left"><img src=http://www.mamicode.com/"../Public/images/ico_03.jpg" /></div> <div class="ask_rig"><h3>星空下的骑士</h3><span>连体短裤是夏季最凉快和轻便的着装，简单风格</span></div> <div class="clear"></div> </div> </div> </volist> </li> <div class="clear"></div> </ul> </div> <!-- screeenA瀑布流End -->
php代码
class IndexAction extends BaseAction{ public function index() { $m = M(‘article‘); $res = $m->select(); //print_r($item); $arr[0] = $this->falls($res,0); $arr[1] = $this->falls($res,1); $arr[2] = $this->falls($res,2); $arr[3] = $this->falls($res,3); $this->assign(‘bcid‘,0);//顶级栏目 $this->assign(‘arr_0‘,$this->falls($res,0)); $this->assign(‘arr_1‘,$this->falls($res,1)); $this->assign(‘arr_2‘,$this->falls($res,2)); $this->assign(‘arr_3‘,$this->falls($res,3)); $this->assign(‘ishome‘,‘home‘); $this->display(); } public function falls($arr,$v){ foreach($arr as $k=>$val){ for($i=0;$i<4;$i++){ $a = $i*4+$v; if($k==$a){ $item[] = $val; } } } return $item; } }
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