PHP使用CURL向服务器POST文本数据和上传图片的代码示例

define('FORM_BOUNDARY', uniqid('----WebKitFormBoundary'));
define('FORM_HYPHENS', '--');
define('FORM_EOL', "\r\n");
define('FORM_IMG_FIELD_NAME', 'img[]');

/**
 * 拼接文本类型的表单项
 * @param string $value 表单项的域值
 * @param string $key 表单项的域名
 */
function text_form_data_splice($value, $key) {
    global $post_data;
    $post_data .= FORM_HYPHENS . FORM_BOUNDARY . FORM_EOL
               . "Content-Disposition: form-data; name=\"$key\""
               . FORM_EOL . FORM_EOL
               . $value . FORM_EOL;
}

/**
 * 拼接上传图片类型的表单项
 * @param string $value 图片在本地的路径
 * @param string $key 图片名称
 */
function image_form_data_splice($value, $key) {
    global $post_data;

    $image_type = exif_imagetype($value);
    if ($image_type === false) {
        return;
    }
    $mime_type = image_type_to_mime_type($image_type);
    $post_data .= FORM_HYPHENS . FORM_BOUNDARY . FORM_EOL
               . "Content-Disposition: form-data; name=\"" . FORM_IMG_FIELD_NAME
               . "\"; filename=\"$key\"" . FORM_EOL
               . "Content-Type: $mime_type" . FORM_EOL . FORM_EOL
               . file_get_contents($value) . FORM_EOL;
}

function curl_post($url, array $header, $data) {
    $options = [
        CURLOPT_URL => $url,
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_HEADER => false,
        CURLOPT_POST => true,
        CURLOPT_HTTPHEADER => $header,
        CURLOPT_POSTFIELDS => $data,
    ];

    $ch = curl_init();
    curl_setopt_array($ch, $options);
    $resp = curl_exec($ch);
    if (curl_errno($ch)) {
        $ret = [
            'code' => -1,
            'resp' => curl_error($ch),
        ];
    } else {
        $ret = [
            'code' => curl_getinfo($ch, CURLINFO_HTTP_CODE),
            'resp' => $resp,
        ];
    }
    curl_close($ch);

    return $ret;
}

/*
 * 要POST的文本数据和本地图片
 */
$text_data = [
    'username' => 'Tom',
    'password' => '123456',
];
$img_data = [
    'test-img1.jpg' => '/Users/RockyLiang/Pictures/test-img1.jpg',
    'test-img2.jpg' => '/Users/RockyLiang/Pictures/test-img2.jpg',
];

$url = 'http://115.29.39.230/index.php'; // 服务器URL，根据实际情况进行修改
$req_headers = [
    'Content-Type: multipart/form-data; boundary=' . FORM_BOUNDARY,
];
$post_data = '';

array_walk($text_data, 'text_form_data_splice');
array_walk($img_data, 'image_form_data_splice');
if (!empty($post_data)) {
    $post_data .= FORM_HYPHENS . FORM_BOUNDARY . FORM_HYPHENS;
}

$result = curl_post($url, $req_headers, $post_data);
var_dump($result);