php 获取远程文件的大小 比如:// 实例测试
echo remote_filesize("http://www.heimaolianmeng.com/luoyue/images/logo3.jpg"); 浏览器显示就是16699 字节
下面是源码:
<?php
// 获取远程文件的大小
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))
{
$headers = array('Authorization: Basic ' . ba
se64_encode("$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.heimaolianmeng.com/luoyue/images/logo3.jpg");