(PHP 5 >= 5.2.0, PHP 7)
image_type_to_extension — Get file extension for image type
image_type_to_extension ( int $imagetype [, bool $include_dot = true ] ) : string
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.
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); ?>
Note:
This function does not require the GD image library.
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https://www.php.net/manual/en/function.image-type-to-extension.php