Using PHP to implement the escape and unescape functions of JavaScript

JavaScript has the encoding function escape () and the corresponding decoding function unescape (), while PHP has only one urlencode and UrlDecode, and this encoding and decoding function is valid for encodeURI and encodeURIComponent , but is not valid for escape.
The Escape () function and the unescape () function in JavaScript are encoded in the user string, similar to the UrlEncode () function in PHP, which is the escape function code implemented by PHP:

/** JS escape PHP Implementation * @param $string the string want to be escaped * @param $in _encoding * @param $out _enco Ding*/ functionEscape$string,$in _encoding= ' UTF-8 ',$out _encoding= ' UCS-2 ') {     $return= ' '; if(function_exists(' Mb_get_info ')) {          for($x= 0;$x< Mb_strlen ($string,$in _encoding);$x++) {             $str= Mb_substr ($string,$x, 1,$in _encoding ); if(strlen($str) > 1) {//multi-byte characters                $return. = '%u '.Strtoupper(Bin2Hex(Mb_convert_encoding ($str,$out _encoding,$in _encoding ) ) ); } Else {                 $return. = '% '.Strtoupper(Bin2Hex($str ) ); }         }     }     return $return; }

The corresponding decoding PHP unescape code is:

functionUnescape ($str) {     $ret= ' '; $len=strlen($str);  for($i= 0;$i<$len;$i++)     {         if($str[$i] = = '% ' &&$str[$i+ 1] = = ' U ')         {             $val=Hexdec(substr($str,$i+ 2, 4)); if($val< 0x7f)                 $ret.=CHR($val); Else                  if($val< 0x800)                     $ret.=CHR(0xc0 | ($val>> 6)).CHR(0x80 | ($val& 0x3f)); Else                     $ret.=CHR(0xe0 | ($val>> 12)).CHR(0x80 | (($val>> 6) & 0x3f).CHR(0x80 | ($val& 0x3f)); $i+ = 5; } Else              if($str[$i] = = '% ')             {                 $ret.=UrlDecode(substr($str,$i, 3)); $i+ = 2; } Else                 $ret.=$str[$i]; }     return $ret; }

Using PHP to implement the escape and unescape functions of JavaScript