the great escape PHP下escape解碼函數的實作方法

GB2312編碼：

複製程式碼 程式碼如下:

function unescape($str) {
$str = 🎜>$raw $str);
preg_match_all("/%u.{4}|.{4};|d+;|.+/U",$str,$r);
$ar = $r[0];
foreach($ar as $k=>$v) {
if(substr($v,0,2) == "%u")
$ar[ $k] = iconv("UCS-2","GBK",pack("H4",substr($v,-4)));
elseif(substr($v,0,3) == " ")
$ar[$k] = iconv("UCS-2","GBK",pack("H4",substr($v,3,-1)));
elseif (substr($v,0,2) == "") {
$ar[$k] = iconv("UCS-2","GBK",pack("n",substr($v ,2,-1)));
}
}
return join("",$ar);
}

UTF8編碼：

複製程式碼 程式碼如下:

function unescape($str){
$ret = '';
$len = strlen($str);
for ($i = 0; $i if ($str[$i] == '%' && $str[$i+1 ] == 'u'){
$val = hexdec(substr($str, $i+2, 4));
if ($val else if($val >6)).chr(0x80|($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;
}

以上就介紹了the great escape PHP下escape解碼函數的實作方法，包括了the great escape方面的內容，希望對PHP教程有興趣的朋友有所幫助。