php µç×ÓÓʼþ·´±àÂëµ÷ÓÃÀà³ö´í

PHP code:

class CODE
{
function decode_mime($string){

$pos=strpos($string,'=?'); //ͳ¼Æ=?֮ǰµÄ×Ö·ûÊý

if (!is_int($pos)) { //ÅжÏÊÇ·ñÊÇÕûÊý

return $string;
}

$preceding = substr($string, 0, $pos); // ±£´æËùÓÐÇ°ÎÄ

$search = substr($string, $pos+2); /* the mime header spec says this is the longest a single encoded word can be */

$d1 = strpos($search, '?');

if (!is_int($d1)) {

return $string;

}

$charset = substr($string, $pos+2, $d1); //È¡³ö×Ö·û¼¯µÄ¶¨Ò岿·Ö

$search = substr($search, $d1+1); //×Ö·û¼¯¶¨ÒåÒÔºóµÄ²¿·Ö£½>$search;

$d2 = strpos($search, '?');

if (!is_int($d2)) {

return $string;

}

$encoding = substr($search, 0, $d2); ////Á½¸ö? Ö®¼äµÄ²¿·Ö±àÂ뷽ʽ £ºq »ò b

$search = substr($search, $d2+1);

$end = strpos($search, '?='); //$d2+1 Óë $end Ö®¼äÊDZàÂëÁË µÄÄÚÈÝ£º=> $endcoded_text;

if (!is_int($end)) {

return $string;

}

$encoded_text = substr($search, 0, $end);

$rest = substr($string, (strlen($preceding . $charset . $encoding . $encoded_text)+6)); //+6 ÊÇÇ°ÃæÈ¥µôµÄ =????= Áù¸ö×Ö·û

switch ($encoding) {

case 'Q':

case 'q':

//$encoded_text = str_replace('_', '%20', $encoded_text);

//$encoded_text = str_replace('=', '%', $encoded_text);