php urlencode() function implements URL encoding analysis_PHP tutorial

The urlencode() function in PHP is to convert Chinese into string encoding, so that it will not cause the Chinese URL to be garbled or wrong when opened in the browser. Let me introduce to you how to use urlencode() Coding is some nuts and bolts.

urlencode
(PHP 4, PHP 5)

urlencode — encode a URL string

Report a bug Description
string urlencode ( string $str )
This function makes it easy to encode a string and use it in the request part of the URL, and it also makes it easy to pass variables to the next page.

Report a bug parameter

str
The string to encode.

Report a bug return value

Returns a string in which all non-alphanumeric characters except -_. will be replaced with a percent sign (%) followed by two hexadecimal digits, and spaces are encoded as plus signs ( +). This encoding is the same as the encoding of WWW form POST data, and the same encoding as the application/x-www-form-urlencoded media type. For historical reasons, this encoding differs from the RFC1738 encoding (see rawurlencode()) in encoding spaces as plus signs (+).

What is URLEncode:

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 the html file encoded as GB2312,
/中文.rar -> The browser automatically converts to -> /%D6%D0%CE%C4.rar
Note: Firefox does not have good support for Chinese URLs in GB2312 Encode because it sends URLs in UTF-8 encoding by default, but the ftp:// protocol is fine. I tried it. I think this should be regarded as a bug in Firefox.

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

URLEncode in PHP:

The code is as follows

Copy code

代码如下	复制代码
//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-_. ?>

//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 plus signs (+)

rawurlencode encodes spaces as plus signs (%20)

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

代码如下	复制代码
$url = ‘/中文.rar’; echo urlencode(mb_convert_encoding($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 ?>

代码如下	复制代码
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; } $url=”ftp://ud03:password@ud03.kinoko.name/中文/中文.rar”; echo parseurl($url); //ftp://ud03:password@ud03.kinoko.name/%D6%D0%CE%C4/%D6%D0%CE%C4.rar ?>

1. Save the file as a UTF-8 file and use urlencode or rawurlencode directly. 2. Use the mb_convert_encoding function.

The code is as follows	Copy code
$url = ‘/中文.rar’; echo urlencode(mb_convert_encoding($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 ?>

Example:

The code is as follows	Copy code
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; } $url=”ftp://ud03:password@ud03.kinoko.name/中文/中文.rar”; echo parseurl($url); //ftp://ud03:password@ud03.kinoko.name/%D6%D0%CE%C4/%D6%D0%CE%C4.rar ?>

URLEncode in JavaScript:

The code is as follows

代码如下	复制代码
%E4%B8%AD%E6%96%87-_.%20%E4%B8%AD%E6%96%87-_.%20

Copy code

代码如下	复制代码
/%E4%B8%AD%E6%96%87.rarhttp%3A%2F%2Fud03.kinoko.name%2F%E4%B8%AD%E6%96%87.rar

%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.

The code is as follows	Copy code
/%E4%B8%AD%E6%96%87.rarhttp%3A%2F%2Fud03.kinoko.name%2F%E4%B8%AD%E6%96%87.rar

Note:

Note: Be careful with variables matching HTML entities. Characters like &, © and £ will all be parsed by the browser and replace the expected variable name with the actual entity. This is obvious confusion, and the W3C has been warning people about it for several years. Reference address: » http://www.w3.org/TR/html4/appendix/notes.html#h-B.2.2. PHP supports changing the parameter separator to the semicolon recommended by W3C through the arg_separator.ini directive. Unfortunately most user agents do not send form data in semicolon delimited format. A simpler solution is to use & instead of & as the delimiter. You don't need to modify PHP's arg_separator for this. Leave it still & and just use htmlentities() or htmlspecialchars() to encode your URL.

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www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/632093.htmlTechArticleIn php, the urlencode() function is to convert Chinese into string encoding, so that it will not cause Chinese URLs There are problems with garbled characters or errors when opening in the browser. Let me introduce to you how to use...