例如给定 http://www.75271.com/index.html?id=1 返回.html
<?php
/**
* 给定url，获取文件后缀
* @param string $url
* @return string
*/
function getUrlPostfix ($url)
{
$url_arr = explode('.', $url);
$postfix = $url_arr[count($url_arr) - 1];
$substr = substr($postfix, 0, 3);
return $substr;
}
$url = "http://www.75271.com/index.html?id=1";
$str = getUrlPostfix($url);
echo $str . "\n";
开心洋葱 , 版权所有丨如未注明 , 均为原创丨未经授权请勿修改 , 转载请注明php从给定的url获取文件扩展名！
