PHP之url常用函数

urlencode

将字符串编码成在url中传输的字符串，会将某些特殊符号转义。

<?php
$myStr = " <>;'\"=&|[][]这是一段字符串..nomal";
echo urlencode($myStr);
//+%3C%3E%3B%27%22%3D%26%7C%5B%5D%5B%5D%E8%BF%99%E6%98%AF%E4%B8%80%E6%AE%B5%E5%AD%97%E7%AC%A6%E4%B8%B2..nomal

urldecode

将经过urlencode编码的字符串转义回编码之前。

$realStr = urldecode($encodeStr);

http_build_query

将数组转化为http请求的形式。参照php.net

<?php
$data = array('foo'=>'bar',
              'baz'=>'boom',
              'cow'=>'milk',
              'php'=>'hypertext processor'
);
echo http_build_query($data);
//foo=bar&baz=boom&cow=milk&php=hypertext+processor