int 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@zymsys.com ) 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);
ImageString($im,1,5,5,"Error loading $imgname",$tc); /* Output an errmsg */
}
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.