image_type_to_extension

(PHP 5)

image_type_to_extension — Get file extension for image type

string image_type_to_extension ( int $imagetype [, bool $include_dot ] )

Returns the extension for the given IMAGETYPE_XXX constant.

imagetype: One of the IMAGETYPE_XXX constant.
include_dot: Whether to prepend a dot to the extension or not. Default to TRUE.

A string with the extension corresponding to the given image type.