程式設計@筆記

<?php
function LoadGif($imgname)
{
/* Attempt to open */
$im = @imagecreatefromgif($imgname);

/* See if it failed */
if(!$im)
{
/* Create a blank image */
$im = imagecreatetruecolor (150, 30);
$bgc = imagecolorallocate ($im, 255, 255, 255);
$tc = imagecolorallocate ($im, 0, 0, 0);

imagefilledrectangle ($im, 0, 0, 150, 30, $bgc);

/* Output an error message */
imagestring ($im, 1, 5, 5, 'Error loading ' . $imgname, $tc);
}

return $im;
}

header('Content-Type: image/gif');

$img = LoadGif('bogus.image');

imagegif($img);
imagedestroy($img);
?>