GD image type detection

[toast]

Hi,

I wonder if anyone can shed some light on what's wrong with my code.

The problem is that I don't know whether or not $the_image is going to be a gif or jpeg. I tried to put some extra code in to get it to detect which type the image was (show below) but this hasn't seemed to work.

If I specify a jpeg for $the_image it outputs the image fine but if I specify a gif the output is just a black block.

Here is the code:

<?php

$the_image = "/path/to/image";
$image_info = GetImageSize($the_image);


if ($image_info[2] == 1) { Header("Content-Type: image/gif"); }
elseif ($image_info[2] == 2) { Header("Content-Type: image/jpeg"); }

$fp_x = $image_info[0] / 1.3;		// fp_x is new image width
$fp_y = $image_info[1] / 1.3;	// fp_y is new image height

$dst_img=ImageCreateTrueColor($fp_x - 1,$fp_y - 1);

if ($image_info[2] == 1) { $src_img=ImageCreateFromGif($the_image); }
elseif ($image_info[2] == 2) { $src_img=ImageCreateFromJpeg($the_image); }

ImageCopyResampled($dst_img,$src_img,0,0,0,0,$fp_x,$fp_y,ImageSX($src_img),ImageSY($src_img));

if ($image_info[2] == 1) { ImageGif($dst_img); }
elseif ($image_info[2] == 2) { ImageJpeg($dst_img,'',95); }

ImageDestroy($src_img);
ImageDestroy($dst_img);

?>

Any ideas?

Thanks in advance,
- Toast

[largo]

Toast,

See if this works:

// .. continued
$image_info = GetImageSize($the_image);

$fp_x = $image_info[0] / 1.3;
$fp_y = $image_info[1] / 1.3;

if ($image_info[2] == 1) {
    Header("Content-Type: image/gif");
    $dst_img=ImageCreate($fp_x - 1,$fp_y - 1);
    $src_img=ImageCreateFromGif($the_image);

}
elseif ($image_info[2] == 2) {
    Header("Content-Type: image/jpeg");
    $dst_img=ImageCreateTrueColor($fp_x - 1,$fp_y - 1);
    $src_img=ImageCreateFromGif($the_image);
}

 ImageCopyResampled($dst_img,$src_img, 0, 0, 0, 0, $fp_x , $fp_y, ImageSX($src_img), ImageSY($src_img));

if ($image_info[2] == 1) {
    ImageGif($dst_img);
}
elseif ($image_info[2] == 2) { 
    ImageJpeg($dst_img,'',95);
}

ImageDestroy($src_img);
ImageDestroy($dst_img);

Diff being gif created without "truecolor" function. (I didn't run any of this code so watch out for parse errors!)

hth.