PHP Manual: Get file extension for image type

Description

stringfalse image_type_to_extension(int $image_type, bool $include_dot = true)

Returns the extension for the given IMAGETYPE_* constant.

Parameters

image_type: One of the IMAGETYPE_* constant.
include_dot: Whether to prepend a dot to the extension or not. Default to true.

Return Values

A string with the extension corresponding to the given image type, or false on failure.

Examples

Example #1 image_type_to_extension example

<?php
// Create image instance
$im = imagecreatetruecolor(100, 100);

// Save image
imagepng($im, './test' . image_type_to_extension(IMAGETYPE_PNG));
imagedestroy($im);
?>

Notes

Note:
This function does not require the GD image library.