Regular expression help needed.

[barbara1712]

Hello Guys,

I need your help.
I am having the information of the user.In this each user submits 6 documents.
The name of documents are like

username_A.pdf
username_B.pdf
username_A.jpg
username_B.jpg
username_thumb.jpg
username.doc

Now I want only username_A.jpg.The values for extensions are jpg,jpeg,JPG,JPEG.
So could any one help me please how to extract say _A.jpg from all the 6 documents.

I am using the following reg. expression.But it also matches for pdf.

preg_match("/_A\.[jpg|JPG|jpeg|JPEG]/",$file)
//also tried for
if(preg_match("/_A\.[(jpg)|(JPG)|(jpeg)|(JPEG)]/",$file)) 

Your help will be appriciated.
Thanks,

[t0WL337]

So you need case insensitive?

<?php
// The "i" after the pattern delimiter indicates a case-insensitive search
if (preg_match("/php/i", "PHP is the web scripting language of choice.")) {
    echo "A match was found.";
} else {
    echo "A match was not found.";
}
?>

Taken from: http://www.php.net/manual/en/function.preg-match.php
Sry its kind of out of context

[ozPATT]

this is by far the best resource I have found on Reg Exps, hopefully it will be of some use to you

http://weblogtoolscollection.com/regex/regex.php

[barbara1712]

Thanks t0WL337 and ozPATT
I know that "i" is case-insensitive.

This is my php code

$file="Myfile_A_A.jpg";
if(preg_match("/_A\.[(jpg)|(JPG)|(jpeg)|(JPEG)]/",$file))
{
    echo "Matched";
}
else
{
    echo "Not Matched";
} 

The o/p = Matched.

But if I change the extension say .pdf.It is also giving me the o/p as "Matched".
which i don't want.I want only extensions having jpg images.

Please help me.

[php_daemon]

if(preg_match("/_A\.(jpg|jpeg)$/i",$file))

[barbara1712]

Thanks php_daemon,

It worked.
Cheers.