(PHP 5)
image_type_to_extension — Get file extension for image type
Returns the extension for the given IMAGETYPE_XXX constant.
One of the IMAGETYPE_XXX constant.
Whether to prepend a dot to the extension or not. Default to TRUE.
A string with the extension corresponding to the given image type.
Note: This function does not require the GD image library.
Example #1 image_type_to_extension() example
<?php// Create image instance$im = imagecreatetruecolor(100, 100);// Save imageimagepng($im, './test' . image_type_to_extension(IMAGETYPE_PNG));imagedestroy($im);?>