Code Differences

Whats the difference between the code contained in this post, and the code posted in the second? – The second creates barcodes that can be scanned using a barcode scanner, well as the first block of code doesn’t. Why is this? What has the 2nd block of code got what the 1st hasn’t?

[B]FIRST BLOCK[/B]

[CODE]<?php
$rectangle_width = 2;
$rectangle_height = 20;

$image = imagecreatetruecolor(500, 182);
$white = imagecolorallocate($image, 255, 255, 255);
$black = imagecolorallocate($image, 0, 0, 0);
imagefill($image, 0, 0, $white);

$find = array(‘0’, ‘1’, ‘2’, ‘3’, ‘4’, ‘5’, ‘6’, ‘7’, ‘8’, ‘9’, ‘*’);
$replace = array(‘00110000’, ‘00110001’, ‘00110010’, ‘00110011’, ‘00110100’, ‘00110101’, ‘00110110’, ‘00110111’, ‘00111000’, ‘00111001’, ‘00101010’);

$string = ‘*1101*’;
$textstring = str_replace($find, $replace, $string);

$j = 0;
$sarray = str_split($textstring, 1);
for($i = 0; $i < count($sarray); $i++)
{
if($sarray[$i] == ‘0’)
{
imagefilledrectangle($image, $rectangle_width * $j, 0, ($rectangle_width * $j) + $rectangle_width, $rectangle_height, $white);
$j++;

}
elseif($sarray[$i] == ‘1’)
{
imagefilledrectangle($image, $rectangle_width * $j, 0, ($rectangle_width * $j) + $rectangle_width, $rectangle_height, $black);
$j++;
}
}

header(“Content-type: image/jpeg”);
imagejpeg($image);
imagedestroy($image);
?>[/CODE]

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