PHP下escape解码函数的实现方法
2018-09-21 16:41
GB2312编码：
复制代码 代码如下:
function unescape($str) {
$str = rawurldecode($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编码：
复制代码 代码如下:
function unescape($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;
}