What type of image is it

Once again we are using the GetImageSize function but this time we are going to display what kind of image it is . As we mentioned before the GetImageSize function returns an array with 4 elements . Index 2 is a flag which indicates the type of the image . Here are the flags available

1 = GIF, 2 = JPG, 3 = PNG, 4 = SWF, 5 = PSD, 6 = BMP

Code :

<?php
if($img = @GetImageSize("ihcomputing1.gif"))
{
switch ($img[2])
{
case 1 :
echo "image is a gif";
break;
case 2 :
echo "image is a jpeg";
break;
case 3 :
echo "image type is PNG";
break;
case 4 :
echo "image type is SWF";
break;
case 5 :
echo "image type is PSD";
break;
case 6 :
echo "image type is BMP";
break;
}
}
else
{
echo "image does not exist";
}
?>

Example :

 

image is a gif