imagetypes
  Return the image types supported by this PHP build
  
 
  Description
  
   int imagetypes
    ( void
   )
  
  
 
  Return Values
  
   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 | 
   IMG_XPM.
  
  
 
  Examples
  
   
    Example #1 Checking for PNG support
    
<?php
if (imagetypes() & IMG_PNG) {
    echo "PNG Support is enabled";
}
?>