exif_imagetype
(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
exif_imagetype — Determine the type of an image
Description
exif_imagetype() reads the first bytes of an image and
checks its signature.
exif_imagetype() can be used to avoid calls to other
exif functions with unsupported file types
or in conjunction with $_SERVER['HTTP_ACCEPT'] to check
whether or not the viewer is able to see a specific image in the browser.
Parameters
filename-
The image being checked.
Return Values
When a correct signature is found, the appropriate constant value will be
returned otherwise the return value is false. The return value is the
same value that getimagesize() returns in index 2 but
exif_imagetype() is much faster.
The following constants are defined, and represent possible
exif_imagetype() return values:
Note:
exif_imagetype() will emit an E_NOTICE
and return false if it is unable to read enough bytes from the file to
determine the image type.
Examples
Example #1 exif_imagetype() example
<?php
if (exif_imagetype('image.gif') != IMAGETYPE_GIF) {
echo 'The picture is not a gif';
}
?>
Exif Functions
Exif Functions