以前忽略的函数。今天看t.qq.com开发接口，发现了。
1、http_build_query($params);
2、parse_str($r, $out);
curl用于向服务器发送http(s)请求。
1 /** 2 * HTTP请求类 3 * @author xiaopengzhu <xp_zhu@qq.com> 4 * @version 2.0 2012-04-20 5 */ 6 class Http 7 { 8 /** 9 * 发起一个HTTP/HTTPS的请求 10 * @param $url 接口的URL 11 * @param $params 接口参数 array('content'=>'test', 'format'=>'json'); 12 * @param $method 请求类型 GET|POST 13 * @param $multi 图片信息 14 * @param $extheaders 扩展的包头信息 15 * @return string 16 */ 17 public static function request( $url , $params = array(), $method = 'GET' , $multi = false, $extheaders = array()) 18 { 19 if(!function_exists('curl_init')) exit('Need to open the curl extension'); 20 $method = strtoupper($method); 21 $ci = curl_init(); 22 curl_setopt($ci, CURLOPT_USERAGENT, 'PHP-SDK OAuth2.0'); 23 curl_setopt($ci, CURLOPT_CONNECTTIMEOUT, 3); 24 curl_setopt($ci, CURLOPT_TIMEOUT, 3); 25 curl_setopt($ci, CURLOPT_RETURNTRANSFER, true); 26 curl_setopt($ci, CURLOPT_SSL_VERIFYPEER, false); 27 curl_setopt($ci, CURLOPT_SSL_VERIFYHOST, false); 28 curl_setopt($ci, CURLOPT_HEADER, false); 29 $headers = (array)$extheaders; 30 switch ($method) 31 { 32 case 'POST': 33 curl_setopt($ci, CURLOPT_POST, TRUE); 34 if (!empty($params)) 35 { 36 if($multi) 37 { 38 foreach($multi as $key => $file) 39 { 40 $params[$key] = '@' . $file; 41 } 42 curl_setopt($ci, CURLOPT_POSTFIELDS, $params); 43 $headers[] = 'Expect: '; 44 } 45 else 46 { 47 curl_setopt($ci, CURLOPT_POSTFIELDS, http_build_query($params)); 48 } 49 } 50 break; 51 case 'DELETE': 52 case 'GET': 53 $method == 'DELETE' && curl_setopt($ci, CURLOPT_CUSTOMREQUEST, 'DELETE'); 54 if (!empty($params)) 55 { 56 $url = $url . (strpos($url, '?') ? '&' : '?') 57 . (is_array($params) ? http_build_query($params) : $params); 58 } 59 break; 60 } 61 curl_setopt($ci, CURLINFO_HEADER_OUT, TRUE ); 62 curl_setopt($ci, CURLOPT_URL, $url); 63 if($headers) 64 { 65 curl_setopt($ci, CURLOPT_HTTPHEADER, $headers ); 66 } 67 68 $response = curl_exec($ci); 69 curl_close ($ci); 70 return $response; 71 } 72 }