<?php /*  *  * @desc URL安全形式的base64编码  * @param string $str  * @return string  */   function urlsafe_base64_encode($str){   $find = array("+","/");   $replace = array("-", "_");   return str_replace($find, $replace, base64_encode($str)); }  /**  * generate_access_token  *  * @desc 签名运算  * @param string $access_key  * @param string $secret_key  * @param string $url  * @param array $params  * @return string  */ function generate_access_token($access_key, $secret_key, $url, $params = ''){   $parsed_url = parse_url($url);   $path = $parsed_url['path'];   $access = $path;   if (isset($parsed_url['query'])) {     $access .= "?" . $parsed_url['query'];   }   $access .= "/n";   if($params){     if (is_array($params)){       $params = http_build_query($params);     }     $access .= $params;   }   $digest = hash_hmac('sha1', $access, $secret_key, true);   return $access_key.':'.urlsafe_base64_encode($digest); }  /**  * 测试  */  $access_key = '''your access_key'; $secret_key = 'your secret_key';  $fetch = urlsafe_base64_encode('http://203.208.46.200/images/srpr/logo11w.png'); $to = urlsafe_base64_encode('ibeircn:11.jpg');  $url = 'http://iovip.qbox.me/fetch/'. $fetch .'/to/' . $to;  $access_token = generate_access_token($access_key, $secret_key, $url);  $header[] = 'Content-Type: application/json'; $header[] = 'Authorization: QBox '. $access_token;   $con = send('iovip.qbox.me/fetch/'.$fetch.'/to/'.$to, $header); var_dump($con);  function send($url, $header = '') {   $curl = curl_init($url);   curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);   curl_setopt($curl, CURLOPT_HEADER,1);   curl_setopt($curl, CURLOPT_HTTPHEADER, $header);   curl_setopt($curl, CURLOPT_POST, 1);    $con = curl_exec($curl);    if ($con === false) {     echo 'CURL ERROR: ' . curl_error($curl);   } else {     return $con;   } } ?>