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php从给定url获取文件扩展名的方法_php技巧

WBOY
WBOYOriginal
2016-05-16 20:20:53962browse

本文实例讲述了php从给定url获取文件扩展名的方法。分享给大家供大家参考。具体实现方法如下:

<&#63;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.jb51.net/index.html&#63;id=1";
$str = getUrlPostfix($url);
echo $str . "\n";

希望本文所述对大家的php程序设计有所帮助。

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