How to convert "garbled characters" into Chinese characters using php code

How can php use code to convert "garbled text" into Chinese characters, just like the Chinese in the address bar of Baidu? how can I convert such strings into Chinese ??? % E5 % 8C % 97% E4 % BA % AC what functions should I use to convert to Chinese ?? For your help,... urlencode-encode the URL string and return a string. in addition to the-_ php code, how can I convert "garbled characters" to Chinese characters?
Just like the Chinese characters in the address bar of Baidu, how can I convert such strings into Chinese ???

% E5 % 8C % 97% E4 % BA % AC what functions should I use to convert to Chinese ?? Help me ....

------ Solution --------------------
Urlencode-encode a URL string

Returns a string -_. all other non-alphanumeric characters will be replaced with a semicolon (%) followed by two hexadecimal numbers, and spaces will be encoded as the plus sign (+ ). This encoding method is the same as that for WWW form POST data and the same as that for application/x-www-form-urlencoded. For historical reasons, this encoding is different from RFC1738 encoding (see rawurlencode () in space encoding as the plus sign (+. This function allows you to encode a string and use it in the request part of a URL. It also allows you to pass variables to the next page:
Echo '';
?>

Urldecode-decode the encoded URL string
Decodes any % # in the encoded string ##. Returns the decoded string.

$ A = explode ('&', $ QUERY_STRING );
$ I = 0;
While ($ I <count ($ )){
$ B = split ('=', $ a [$ I]);
Echo 'Value for parameter ', htmlspecialchars (urldecode ($ B [0]),
'Is, htmlspecialchars (urldecode ($ B [1]),"
\ N ";
$ I ++;
}
?>