<?php
$url = "http://blog.csdn.net/ztlove9481731";
echo urlencode($url);							//输出编码后的字符串
?>




<?php
$url = "http%3A%2F%2Fblog.csdn.net%2Fztlove9481731";
$newurl = urlencode($url);							//首先对$url进行编码
echo urldecode($newurl);							//输出解码后的字符串
?>