1、使用file_get_contents()
复制代码 代码如下:
<?php $file = file_get_contents($url); echo strlen($file); ?>
2. 使用get_headers()
复制代码 代码如下:
<?php $header_array = get_headers($url, true); $size = $header_array['Content-Length']; echo $size; ?>
PS: 需要打开allow_url_fopen! 如未打开会显示 Warning: get_headers() [function.get-headers]: URL file-access is disabled in the server configuration 3.使用fsockopen()
复制代码 代码如下:
<?php function get_file_size($url) { $url = parse_url($url); if (empty($url['host'])) { return false; } $url['port'] = empty($url['post']) ? 80 : $url['post']; $url['path'] = empty($url['path']) ? '/' : $url['path']; $fp = fsockopen($url['host'], $url['port'], $error); if($fp) { fputs($fp, "GET " . $url['path'] . " HTTP/1.1\r\n"); fputs($fp, "Host:" . $url['host']. "\r\n\r\n"); while (!feof($fp)) { $str = fgets($fp); if (trim($str) == '') { break; }elseif(preg_match('/Content-Length:(.*)/si', $str, $arr)) { return trim($arr[1]); } } fclose ( $fp); return false; }else { return false; } } ?>
本文转载自:https://www.jb51.net/article/39682.htm