PHP script not working GD Library installed - php

Question

Below is my resize.php script. I needed to install the GD Library and did so but I am still having trouble gettint the image to process like it used to my old server.HERE You can see with the error reporting on there is an empty image created and the following errors display:
Warning:
getimagesize(http://stackoverflow.com/questions/19817599/../wp-content/themes/Explorable/panos/Pano__0000.jpg):
failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in
/home/go3de/public_html/wp-content/themes/Explorable/resize.php on
line 16
Warning: Division by zero in
/home/go3de/public_html/wp-content/themes/Explorable/resize.php on
line 19
Warning: Division by zero in
/home/go3de/public_html/wp-content/themes/Explorable/resize.php on
line 30
What is going wrong? PLEASE HELP!
<?php session_start();header("Pragma: public");header("Cache-Control: max-age = 604800");
header("Expires: ".gmdate("D, d M Y H:i:s", time() + 604800)." GMT");
function thumbnail($image, $width, $height) {
if($image[0] != "/") { // Decide where to look for the image if a full path is not given
if(!isset($_SERVER["HTTP_REFERER"])) { // Try to find image if accessed directly from this script in a browser
$image = $_SERVER["DOCUMENT_ROOT"].implode("/", (explode('/', $_SERVER["PHP_SELF"], -1)))."/".$image;
} else {
$image = implode("/", (explode('/', $_SERVER["HTTP_REFERER"], -1)))."/".$image;
}
} else {
$image = $_SERVER["DOCUMENT_ROOT"].$image;
}
$image_properties = getimagesize($image);
$image_width = $image_properties[0];
$image_height = $image_properties[1];
$image_ratio = $image_width / $image_height;
$type = $image_properties["mime"];
if(!$width && !$height) {
$width = $image_width;
$height = $image_height;
}
if(!$width) {
$width = round($height * $image_ratio);
}
if(!$height) {
$height = round($width / $image_ratio);
}
if($type == "image/jpeg") {
header('Content-type: image/jpeg');
$thumb = imagecreatefromjpeg($image);
} elseif($type == "image/png") {
header('Content-type: image/png');
$thumb = imagecreatefrompng($image);
} else {
return false;
}
$temp_image = imagecreatetruecolor($width, $height);
imagecopyresampled($temp_image, $thumb, 0, 0, 0, 0, $width, $height, $image_width, $image_height);
$thumbnail = imagecreatetruecolor($width, $height);
imagecopyresampled($thumbnail, $temp_image, 0, 0, 0, 0, $width, $height, $width, $height);
if($type == "image/jpeg") {
imagejpeg($thumbnail);
} else {
imagepng($thumbnail);
}
imagedestroy($temp_image);
imagedestroy($thumbnail);
}
if(isset($_GET["h"])) { $h = $_GET["h"]; } else { $h = 0; }
if(isset($_GET["w"])) { $w = $_GET["w"]; } else { $w = 0; }
thumbnail($_GET["img"], $w, $h);
?>

Answer 1

How big is the image you're trying to resize? Looks like it's complaining about running out of memory?
Try allocating more memory.
You can try adding this at the very top of the page:
ini_set('memory_limit', '512M');
...and see if it works.

Answer 2

Figured it out! I had a space before the initial <?php opening tag which caused the error! AH! sorry for being a noob!