Example of how PHP implements the method of uploading image files in POST mode-PHP Tutorial-php.cn

Example of how PHP implements the method of uploading image files in POST mode

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Release： 2023-03-20 17:14:02

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This article mainly shares with you an example of how to upload image files in PHP in POST mode. When calling the third-party API interface, sometimes you will encounter uploading images through http protocol. The following is an example of adding permanent materials to the WeChat public platform. ;

php code:

    /* 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;
    }

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You can also use PHP’s built-in system functions. If problems occur during use, it is recommended to check whether the corresponding system functions are enabled.

Use exec system function:

/* 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;

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Use system system function:

/* 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;

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