php man page for image_type_to_extension

IMAGE_TYPE_TO_EXTENSION(3)						 1						IMAGE_TYPE_TO_EXTENSION(3)

image_type_to_extension - Get file extension for image type

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

DESCRIPTION
	Returns the extension for the given IMAGETYPE_XXX constant.

PARAMETERS
	      o $imagetype
		- One of the IMAGETYPE_XXX constant.

	      o $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.

EXAMPLES
       Example #1

	      image_type_to_extension(3) 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.

PHP Documentation Group 												IMAGE_TYPE_TO_EXTENSION(3)