PHP使用curl请求实现post方式上传图片文件功能示例

/* 使用curl函数 */$url = "https://api.weixin.qq.com/cgi-bin/material/add_material?access_token=ACCESS_TOKEN&type=image";$post_data = array(  'media' => '@bag03.jpg',);$response = curl_http($url, 'POST', $post_data);$params = array();$params = json_decode($response,true);if (isset($params['errcode'])){  echo "error:" . $params['errcode'];  echo "msg :" . $params['errmsg'];  exit;}var_dump( $params );/** * http请求方式: 默认GET */function curl_http($url, $method="GET", $postfields){  $ch = curl_init();  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);  curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);  curl_setopt($ch, CURLOPT_URL, $url);  switch ($method) {    case "POST":      curl_setopt($ch, CURLOPT_POST, true);      if (!empty($postfields)) {        $hadFile = false;        if (is_array($postfields) && isset($postfields['media'])) {          /* 支持文件上传 */          if (class_exists('/CURLFile')) {            curl_setopt($ch, CURLOPT_SAFE_UPLOAD, true);            foreach ($postfields as $key => $value) {              if (isPostHasFile($value)) {                $postfields[$key] = new /CURLFile(realpath(ltrim($value, '@')));                $hadFile = true;              }            }          } elseif (defined('CURLOPT_SAFE_UPLOAD')) {            if (isPostHasFile($value)) {              curl_setopt($ch, CURLOPT_SAFE_UPLOAD, false);              $hadFile = true;            }          }        }        $tmpdatastr = (!$hadFile && is_array($postfields)) ? http_build_query($postfields) : $postfields;        curl_setopt($ch, CURLOPT_POSTFIELDS, $tmpdatastr);      }      break;    default:      curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $method); /* //设置请求方式 */      break;  }  $ssl = preg_match('/^https://///i',$url) ? TRUE : FALSE;  curl_setopt($ch, CURLOPT_URL, $url);  if($ssl){    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); // https请求 不验证证书和hosts    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); // 不从证书中检查SSL加密算法是否存在  }  $response = curl_exec($ch);  curl_close($ch);  if(empty($response)){    exit("错误请求");  }  return $response;}function isPostHasFile($value){  if (is_string($value) && strpos($value, '@') === 0 && is_file(realpath(ltrim($value, '@')))) {    return true;  }  return false;}

/* 使用exec函数 */$command = 'curl -F media=@'.$filepath.' "https://api.weixin.qq.com/cgi-bin/media/upload?access_token=ACCESS_TOKEN&type=image"';$retval = array();exec($command, $retval, $status);$params = array();$params = json_decode($retval[0],true);if ($status != 0) {  $params = array(    'errcode'  => '-100',    'errmsg'  => '公众号服务出错，请联系管理员',  );}return $params;

/* 使用system函数 */$command = 'curl -F media=@'.$filepath.' "https://api.weixin.qq.com/cgi-bin/media/upload?access_token=ACCESS_TOKEN&type=image"';$retval = 1;$last_line = system($command, $retval);$params = array();$params = json_decode($last_line,true);if ($retval != 0) {  if (isset($params['errcode'])) {    $params = array(      'errcode'  => '-100',      'errmsg'  => '公众号服务出错，请联系管理员',    );  }}return $params;