PHP整合七牛实现上传文件

七牛支持抓取远程图片 API，用 access_key + secret_key + url 生成 access_token, 把 access_token 加在 header 里，然后向 post url 就完成上传了。

Sample code:

    <?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; 
      } 
    } 
    ?> 

以上所述就是本文的全部内容了，希望大家能够喜欢。