1 <?php
  2 /**
  3  * HTTP 请求类
  4  */
  5 class HttpHelper {
  6   
  7     const METHOD_GET = ‘GET‘;
  8     const METHOD_POST = ‘POST‘;
  9 
 10     private static $_connectTimeout = 60;
 11     private static $_timeout = 60;
 12     
 13     /**
 14      * Http post请求
 15      * @param type $url  http url address
 16      * @param type $data post params name => value 
 17      */
 18     public static function post($url, $data = array()){
 19         
 20         $queryString = self::buildHttpQueryString($data,  self::METHOD_POST);
 21         
 22         $response = self::makeHttpRequest($url, self::METHOD_POST,$queryString);
 23         return $response;
 24     }
 25     
 26     /**
 27      * http get 请求
 28      * @param type $url  http url address
 29      * @param type $data get params name => value
 30      */
 31     public static function get($url,$data = array()) {
 32         if(!empty($data)){
 33             $url .= "?" . self::buildHttpQueryString($data,  self::METHOD_GET);
 34         }
 35         $response = self::makeHttpRequest($url,  self::METHOD_GET);
 36         return $response;
 37     }
 38     
 39     /**
 40      * 构造并发送一个http请求
 41      * @param type $url
 42      * @param type $method
 43      * @param type $postFields
 44      * @return type
 45      */
 46     public static function makeHttpRequest($url,$method,$postFields = null) {
 47         $ch = curl_init();
 48         curl_setopt($ch, CURLOPT_URL, $url);
 49         curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 50         if(self::METHOD_POST == $method){
 51             curl_setopt($ch, CURLOPT_POST, 1);
 52             if(!empty($postFields)){
 53                 curl_setopt($ch, CURLOPT_POSTFIELDS, $postFields);
 54             }
 55         }
 56         curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, self::$_connectTimeout);
 57         curl_setopt($ch, CURLOPT_TIMEOUT, self::$_timeout);
 58         curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
 59         curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
 60         
 61         $result = curl_exec($ch);
 62         curl_close($ch);
 63         return $result;
 64     }
 65     
 66     /**
 67      * 构造http请求的查询字符串
 68      * @param array $params
 69      * @param type $method
 70      * @return string
 71      */
 72     public static function buildHttpQueryString(array $params, $method = self::METHOD_GET) {
 73         if(empty($params)){
 74             return ‘‘;
 75         }
 76         if(self::METHOD_GET == $method){
 77             $keys = array_keys($params);
 78             $values = self::urlEncode(array_values($params));
 79             $params = array_combine($keys, $values);
 80         }
 81         
 82         $fields = array();
 83         
 84         foreach ($params as $key => $value) {
 85             $fields[] = $key . ‘=‘ . $value;
 86         }
 87         return implode(‘&‘,$fields);
 88     }
 89     
 90     /**
 91      * url encode 函数
 92      * @param type $item  数组或者字符串类型
 93      * @return type
 94      */
 95     public static function urlEncode($item) {
 96         if(is_array($item)){
 97             return array_map(array(‘HttpHelper‘,‘urlEncode‘), $item);
 98         }
 99         return rawurlencode($item);
100     }
101     
102     /**
103      * url decode 函数
104      * @param type $item 数组或者字符串类型
105      * @return type
106      */
107     public static function urlDecode($item){
108         if(is_array($item)){
109             return array_map(array(‘HttpHelper‘,‘urlDecode‘), $item);
110         }
111         return rawurldecode($item);
112     }
113 }

echo HttpHelper::get(‘http://www.baidu.com‘, array(‘t‘ => 1));