Question

php中的urlencode和rawurlencode的区别

Answer 1

php中urlencode和rawurlencode两个方法在处理字母数字，特殊符号，中文的时候结果都是一样的，唯一的不同是对空格的处理，urlencode处理成“+”，rawurlencode处理成“%20”。
对比结果如下：
<?php
test_encode('http://www.baidu.com?a=search&k=eclipse');
test_encode(':/?= &#');
test_encode('中文');
function test_encode($s)
{
echo "<b>urlencode('$s')</b> = [<b>";
var_dump(urlencode($s));
echo "</b>]<br/>";
echo "<b>rawurlencode('$s')</b> = [<b>";
var_dump(rawurlencode($s));
echo "</b>]<br/>";
}
运行结果如下：
urlencode('http://www.baidu.com?a=search&k=eclipse') = [string(53) "http%3A%2F%2Fwww.baidu.com%3Fa%3Dsearch%26k%3Declipse" ]
rawurlencode('http://www.baidu.com?a=search&k=eclipse') = [string(53) "http%3A%2F%2Fwww.baidu.com%3Fa%3Dsearch%26k%3Declipse" ]
urlencode(':/?= &#') = [string(19) "%3A%2F%3F%3D+%26%23" ]
rawurlencode(':/?= &#') = [string(21) "%3A%2F%3F%3D%20%26%23" ]
urlencode('中文') = [string(18) "%E4%B8%AD%E6%96%87" ]
rawurlencode('中文') = [string(18) "%E4%B8%AD%E6%96%87" ]

Answer 2

比较明显的区别是
urlencode 将空格转为+
rawurlencode 将空格转化为%20

看了下文档
urlencode — 编码 URL 字符串
rawurlencode — 按照 RFC 1738 对 URL 进行编码