1 <?php
2
3 /**
4 * @description 获取远程文件的字节大小
5 * @param $url 远程文件地址
6 * @return int|mixed
7 */
8 function getFileSize($url){
9 ob_start();
10 $ch = curl_init($url);
11 curl_setopt($ch, CURLOPT_HEADER, 1);
12 curl_setopt($ch, CURLOPT_NOBODY, 1);
13 curl_setopt($ch, CURLOPT_HTTPGET,1);
14 curl_exec($ch);
15 curl_close($ch);
16 $head = ob_get_contents();
17 ob_end_clean();
18 $regex = '/Content-Length:\s([0-9].+?)\s/';
19 preg_match($regex, $head, $matches);
20 return isset($matches[1]) && is_numeric($matches[1]) ? $matches[1] : 0;
21 }
22
23 ?>
