A brief analysis of php's urlencode() URL encoding function_PHP tutorial

There are generally two methods of URLEncoding, one is the traditional Encode based on GB2312 (used by Baidu, Yisou, etc.), and the other is based on UTF-8 Encode (used by Google, Yahoo, etc.).

This tool implements two methods of Encode and Decode respectively:

Chinese-> Encode of GB2312 -> %D6%D0%CE%C4

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

URLEncode in Html:

In html file encoded as GB2312: http:// /s.jb51.net/中文.rar -> The browser automatically converts to -> http://s.jb51.net/%D6%D0%CE%C4.rar

Note: Firefox The Chinese URL support for GB2312 Encode is not good because it sends URLs in UTF-8 encoding by default, but the ftp:// protocol is OK. I tried it. I think this should be regarded as a bug in Firefox.

In the html file encoded as UTF-8: http://s.jb51.net/中文.rar -> The browser automatically converts to -> http://s.jb51.net/ %E4%B8%AD%E6%96%87.rar

URLEncode in PHP:

Copy code The code is as follows:

//Encode of GB2312
echo urlencode("中文-_. ")."n"; //%D6%D0%CE%C4-_. +
echo urldecode("%D6%D0%CE%C4-_. ")."n"; //Chinese-_.
echo rawurlencode("中文-_. ")."n"; //%D6%D0%CE%C4-_.%20
echo rawurldecode("%D6%D0%CE%C4-_. ")."n"; //Chinese-_.
? >

All non-alphanumeric characters except "-_." will be replaced with a percent sign "%" followed by two hexadecimal digits.

The difference between urlencode and rawurlencode: urlencode encodes spaces as a plus sign "+", and rawurlencode encodes spaces as a plus sign "%20".

If you want to use UTF-8 Encode, there are two methods:

1. Save the file as a UTF-8 file and use urlencode or rawurlencode directly.

2. Use the mb_convert_encoding function:

Copy the code The code is as follows:

$url = 'http://s.jb51.net/中文.rar';
echo urlencode(mb_convert_encoding($url, 'utf-8', 'gb2312'))."n";
echo rawurlencode(mb_convert_encoding($url, 'utf-8', 'gb2312'))."n";
//http%3A%2F%2Fs.jb51.net%2F%E4%B8%AD%E6 %96%87.rar
?>

Example:

Copy code The code is as follows:

function parseurl($url="")
{
$url = rawurlencode(mb_convert_encoding($url, 'gb2312', 'utf-8' ));
$a = array("%3A", "%2F", "%40");
$b = array(":", "/", "@");
$url = str_replace($a, $b, $url);
return $url;
}
$url="ftp://ud03:password@s.jb51.net/中文/ Chinese.rar";
echo parseurl($url);
//ftp://ud03:password@s.jb51.net/%D6%D0%CE%C4/%D6%D0%CE% C4.rar
?>

URLEncode in JavaScript:

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

encodeURI does not encode the following characters: ":", "/", ";", "?", "@" and other special characters.

For example: http://s.jb51.net/%E4%B8%AD%E6%96%87.rarhttp%3A%2F%2Fs.jb51.net%2F%E4%B8%AD %E6%96%87.rar

http://www.bkjia.com/PHPjc/324192.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/324192.htmlTechArticleThere are generally two methods of URLEncode, one is the traditional Encode based on GB2312 (used by Baidu, Yisou, etc.) , the other is Encode based on UTF-8 (used by Google, Yahoo, etc.). This tool is divided into...