imagetypes
(PHP 3 CVS only, PHP 4 >= 4.0.2)
imagetypes -- Return the image types supported by this PHP build
Description
int
imagetypes ( void )
This function returns a bit-field corresponding to the image formats supported by the version of GD linked into PHP. The following bits are returned,
IMG_GIF
|
IMG_JPG
|
IMG_PNG
|
IMG_WBMP
. To check for PNG support, for example, do this: 
Example 1. imagetypes() example
<?php
if (imagetypes() & IMG_PNG) {
echo "PNG Support is enabled";
}
?>
