What am doing wrong with this small PHP script? image stamping / watermarking

[yepster123]

Whats am i doing wrong with script, i dont think the script is wrong as its from a reliable site. But it comes up with the errors:

<br />

<b>Warning</b>:  imagecopymerge(): supplied argument is not a valid Image resource in <b>/home/content/m/a/n/manage23/html/soup.php</b> on line <b>13</b><br />

<br />

<b>Warning</b>:  imagejpeg(): supplied argument is not a valid Image resource in <b>/home/content/m/a/n/manage23/html/soup.php</b> on line <b>14</b><br />

<br />

<b>Warning</b>:  imagedestroy(): supplied argument is not a valid Image resource in <b>/home/content/m/a/n/manage23/html/soup.php</b> on line <b>15</b><br />

 

Heres the code, what am i doing wrong. Have a play with it.

 

For the get variable i use "C:\Users\Andy\Documents\enviro\look.jpg"

 

<?php  

header('content-type: image/jpeg');  

$watermark = imagecreatefrompng('watermark.png');  

$watermark_width = imagesx($watermark);  

$watermark_height = imagesy($watermark);  

$image = imagecreatetruecolor($watermark_width, $watermark_height);  

$image = imagecreatefromjpeg($_GET['src']);  

$size = getimagesize($_GET['src']);  

$dest_x = $size[0] - $watermark_width - 5;  

$dest_y = $size[1] - $watermark_height - 5;  

imagecopymerge($image, $watermark, $dest_x, $dest_y, 0, 0, $watermark_width, $watermark_height, 100);  

imagejpeg($image);  

imagedestroy($image);  

imagedestroy($watermark);  

?>

 

[BlueSkyIS]

what does the form look like? i wonder about

 

$image = imagecreatefromjpeg($_GET['src']);

 

what is src??