cURL转发文件上传

curl_redirect_upload.php

<?php
$uploadUrl = 'http://test.com/upload.php';

// 转发从其它客户端上传的文件，上传时字段name="file"，但接收方字段name="attachment"
redirect_upload($uploadUrl, 'attachment', $_FILES['file']);

/*
 * 转发上传文件
 */
function redirect_upload($url, $field = 'file',  $file = null)
{
	if (empty($file)) {
		$file = $_FILES[$field];
	}
	$path = realpath($file['tmp_name']);
	$data = array(
		$field => '@'. $path .';type='. $file['type'] .';filename=' . $file['name'],
	);
	$ch = curl_init();
	curl_setopt($ch, CURLOPT_URL, $url);
	curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
	curl_setopt($ch, CURLOPT_POST, true );
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	@curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);  // 使用自动跳转
	@curl_setopt($ch, CURLOPT_SAFE_UPLOAD, false);
	$result = curl_exec($ch);
	curl_close($ch);
	return $result;
}