在cookieid上的PHP字符串操作

Question

Currently on my webpage, im showing my users their cookieid, which has two parts associated to it, known as their partyid and userid,

the way it is set

localhost/setcookie.php?ptyid=1&uid=628929

result

1%3A628929

the way it is shown

echo 'Cookie Set => 
PartyID : ' .substr($_COOKIE["cookieid"],-8,1). ', UserID : ' .substr($_COOKIE["cookieid"],2);

this was going fine till my setcookie.php only allowed the users to set partyID as 1 and userID had to have exactly 6 characters in it. but now i have to allow them to use any partyid and any amount of characters to the userID.

Therefore is there anyway I could use a substring(or any other method) dynamically to serve any partyid or userid. i think of something which could detect the %3A and split the string but I fail to find a way for that.

Answer 1

When storing the cookie, concatenate the parts by a predefined separator (can be single or multiple characters). Then you can use preg_split to split the parts instead of substr.

This requires the parts them self must not contain the separator. You can make it a constraint for users. Or you can base64_encode the parts to make sure they will only contain certain characters.