(PHP4 >= 4.0.2)
ImageTypes -- 
     Return the image types supported by this PHP build
    
Description
     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 | 
<?php
if (ImageTypes() & IMG_PNG) {
    echo "PNG Support is enabled";
}
?>
       | 
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