Stripping characters from an array

[slpctrl]

Alright, this is a continuation from my last thread, so sorry if that's frowned upon or whatever. Here's my code as it stands:

 

<?php
function getpixels($pic){
$image = imagecreatefrompng($pic);
list($width, $height) = getimagesize($pic);
$height = $height/2;
$vars = array();
for ($i=0; $i<=$width; $i++){
  $color = imagecolorat($image, $i, $height);
  array_push($vars, $color);
}
return $vars;
}
$pixls = getpixels("http://www.hellboundhackers.org/challenges/timed/timed7/barcode.php");
foreach($pixls as $pixl){
echo $pixl;
}
?>

 

And it's output (for what I'll be doing) should look something like so:

 

0000000000101010111101011110010011011110100010110111101010101101100100001011101001100110101110011100101010000000000

 

Now, I need to remove the initial zeros and the zeros on the end (as they just stand for the border of a barcode). How would I go about doing this?

[.josh]

trim

 

dude are you even gonna try and work this out on your own or are you just gonna like, ask for help every step of the way?

[.josh]

lame.  what's the fun in doing a challenge when you're asking for other people to do it for you?

[slpctrl]

lame.  what's the fun in doing a challenge when you're asking for other people to do it for you?

 

I just ask, and I don't even know why. 99.9% of the time I have it before anyone replies. I need to quit doin that. And, I've only asked for help twice. Don't have a hissy fit, nancy.

[slpctrl]

The questions I'm asking are really to bigger problems I'm having with the code; to say I've asked for help the entire bit of the way is ridiculous. I thought that my result was supposed to be in binary, and it's not. Even with stripping the border, I can't seem to do anything with it anyways. The 0s are the white space, 1s are black. I need to strip the borders off of that (done), and then calculate the UPC number of the barcode and I don't know how to even begin analyzing this to find out the UPC number. I would go straight on the HBH forums to ask for help, but only one person has solved this challenge.