PHP Regex help

[moneyman18]

I am trying to replace UBBC in a message using preg_replace and I am not sure why it is not working correctly.

I would like to replace both [sup]Text Here[/sup] and [superscript]Text Here[/superscript] with . Here is the regex.

/\[sup(erscript)?\](.*?)\[\/sup\1\]/s
/\[sup(erscript)?\](.*?)\[\/sup\\1\]/s

It will replace [superscript]Text Here[/superscript], but it doesn't seem to want to replace [sup]Text Here[/sup].

Something as simple as this I can't see any reason to not work correctly.

[russellr]

function SupSwitch ($string) {
$search = array(
   '@\[(?i)superscript\](.*?)\[/(?i)superscript\]@si',
   '@\[(?i)sup\](.*?)\[/(?i)sup\]@si'
);
$replace = array(
   '<sup>\\1</sup>',
   '<sup>\\1</sup>'
);
return preg_replace($search , $replace, $string);
}


Help at all?

[moneyman18]

Well I was trying to do it with just one regex pattern. I will use 2 if I have to but I still would like to know what I did wrong or if it is just not possible. - Figured out how to do it.

What does (?i) do? I can't say I have seen anything like that before.

Edit: Fixed typo.