curl php 下载

<?php
	function curl_get_data($url)
		{
			 $user_agent='Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.110 Safari/537.36';
			
  $fp_output = fopen('abc.mp3', 'w'); //新建文件
				$curl=curl_init();
				// 设置你需要抓取的URL
			
				curl_setopt($curl, CURLOPT_URL, $url);
				
		
				curl_setopt($curl, CURLOPT_HEADER, 1); // 不应该保存header
				
			
				curl_setopt($curl, CURLOPT_USERAGENT, $user_agent);
				
			
				// 运行cURL，请求网页
				curl_setopt($curl, CURLOPT_FILE, $fp_output);	// 下载
				$data = curl_exec($curl);	
			
				curl_close($curl);
				
				return $data;
		}
		$url="http://ia801504.us.archive.org/9/items/160621dtucsu/4eye160621a.mp3";
	$data=curl_get_data($url);
	
	echo $data;
   
	
	
?>