imagecreatefromgif
(PHP 3, PHP 4 )
imagecreatefromgif -- Create a new image from file or URL
Description
resource imagecreatefromgif ( string filename)
imagecreatefromgif() returns an image identifier representing
the image obtained from the given filename.
imagecreatefromgif() returns an empty string on failure.
It also outputs an error message, which unfortunately displays
as a broken link in a browser. To ease debugging the following
example will produce an error GIF: Example 1. Example to
handle an error during creation (courtesy vic at zymsys
dot com)
<?php
function LoadGif ($imgname)
{
$im = @imagecreatefromgif ($imgname); /* Attempt to open
*/
if (!$im) { /* See if it failed */
$im = imagecreate (150, 30); /* Create a blank image */
$bgc = imagecolorallocate ($im, 255, 255, 255);
$tc = imagecolorallocate ($im, 0, 0, 0);
imagefilledrectangle ($im, 0, 0, 150, 30, $bgc);
/* Output an errmsg */
imagestring ($im, 1, 5, 5, "Error loading $imgname",
$tc);
}
return $im;
}
?>
Note: Since all GIF support was removed from the GD library
in version 1.6, this function is not available if you are
using that version of the GD library.
Tip: You can use a URL as a filename with this function
if the fopen wrappers have been enabled. See fopen() for
more details on how to specify the filename and Appendix
J for a list of supported URL protocols.
Warning
Windows versions of PHP prior to PHP 4.3.0 do not support
accessing remote files via this function, even if allow_url_fopen
is enabled.
