以下实例我们使用php curl 来获取远程文件大小,返回文件大小单位为字节:
<?php // 获取远程文件大小函数 function remote_filesize($url, $user = "", $pw = "") { ob_start(); $ch = curl_init($url); curl_setopt($ch, CURLOPT_HEADER, 1); curl_setopt($ch, CURLOPT_NOBODY, 1); if(!empty($user) && !empty($pw)) { $headers = array('Authorization: Basic ' . base64_encode("$user:$pw")); curl_setopt($ch, CURLOPT_HTTPHEADER, $headers); } $ok = curl_exec($ch); curl_close($ch); $head = ob_get_contents(); ob_end_clean(); $regex = '/Content-Length:\s([0-9].+?)\s/'; $count = preg_match($regex, $head, $matches); return isset($matches[1]) ? $matches[1] . " 字节" : "unknown"; } // 实例测试 echo remote_filesize("http://www.codexy.cn/wp-content/themes/codexy/assets/img/codexy-logo@2x.png"); ?>
以上实例输出结果为:
8416 字节