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php教程中urlencode()函数详解说明

URLEncode:是指针对网页url中的中文字符的一种编码转化方式,最常见的就是Baidu、Google等搜索引擎中输入中文查询时候,生成经过Encode过的网页URL。

URLEncode的方式一般有两种,一种是传统的基于GB2312的Encode(Baidu、Yisou等使用),另一种是基于UTF-8的Encode(Google、Yahoo等使用)。

本工具分别实现两种方式的Encode与Decode:

中文 -> GB2312的Encode -> %D6%D0%CE%C4

中文 -> UTF-8的Encode -> %E4%B8%AD%E6%96%87

Html中的URLEncode:

编码为GB2312的html文件中:http://ud03.kinoko.name/中文.rar -> 浏览器自动转换为 -> http://ud03.kinoko.name/%D6%D0%CE%C4.rar

注意:Firefox对GB2312的Encode的中文URL支持不好,因为它默认是UTF-8编码发送URL的,但是ftp://协议可以,我试过了,我认为这应该算是Firefox一个bug。

编码为UTF-8的html文件中:http://ud03.kinoko.name/中文.rar -> 浏览器自动转换为 -> http://ud03.kinoko.name/%E4%B8%AD%E6%96%87.rar

PHP中的URLEncode:
//GB2312的Encode
echo urlencode("中文-_. ")."n"; //%D6%D0%CE%C4-_.+
echo urldecode("%D6%D0%CE%C4-_. ")."n"; //中文-_.
echo rawurlencode("中文-_. ")."n"; //%D6%D0%CE%C4-_.%20
echo rawurldecode("%D6%D0%CE%C4-_. ")."n"; //中文-_.
?>


除了“-_.”之外的所有非字母数字字符都将被替换成百分号“%”后跟两位十六进制数。

urlencode和rawurlencode的区别:urlencode将空格编码为加号“+”,rawurlencode将空格编码为加号“%20”。

如果要使用UTF-8的Encode,有两种方法:

一、将文件存为UTF-8文件,直接使用urlencode、rawurlencode即可。

二、使用mb_convert_encoding函数:
http://pic2.phprm.com/2011/08/10/$url.jpg = 'http://ud03.kinoko.name/中文.rar';
echo urlencode(mb_convert_encoding($url, 'utf-8', 'gb2312'))."n";
echo rawurlencode(mb_convert_encoding($url, 'utf-8', 'gb2312'))."n";
//http%3A%2F%2Fud03.kinoko.name%2F%E4%B8%AD%E6%96%87.rar
?>


实例:
function parseurl(http://pic2.phprm.com/2011/08/10/$url="".jpg)
{
$url = rawurlencode(mb_convert_encoding($url, 'gb2312', 'utf-8'));
$a = array("%3A", "%2F", "%40");
$b = array(":", "/", "@");
$url = str_replace($a, $b, $url);
return $url;
}
$url="ftp://ud03:password@ud03.kinoko.name/中文/中文.rar";
echo parseurl($url);
//ftp://ud03:password@ud03.kinoko.name/%D6%D0%CE%C4/%D6%D0%CE%C4.rar
?>


JavaScript中的URLEncode:

如:%E4%B8%AD%E6%96%87-_.%20%E4%B8%AD%E6%96%87-_.%20

encodeURI不对下列字符进行编码:“:”、“/”、“;”、“?”、“@”等特殊字符。

如:http://ud03.kinoko.name/%E4%B8%AD%E6%96%87.rarhttp%3A%2F%2Fud03.kinoko.name%2F%E4%B8%AD%E6%96%87.rar

 

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