exif_imagetype
(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
exif_imagetype — Determine the type of an image
Description
exif_imagetype(string $filename
): int|false
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:
Imagetype Constants
Value |
Constant |
1 |
IMAGETYPE_GIF |
2 |
IMAGETYPE_JPEG |
3 |
IMAGETYPE_PNG |
4 |
IMAGETYPE_SWF |
5 |
IMAGETYPE_PSD |
6 |
IMAGETYPE_BMP |
7 |
IMAGETYPE_TIFF_II (intel byte order) |
8 |
IMAGETYPE_TIFF_MM (motorola byte order)
|
9 |
IMAGETYPE_JPC |
10 |
IMAGETYPE_JP2 |
11 |
IMAGETYPE_JPX |
12 |
IMAGETYPE_JB2 |
13 |
IMAGETYPE_SWC |
14 |
IMAGETYPE_IFF |
15 |
IMAGETYPE_WBMP |
16 |
IMAGETYPE_XBM |
17 |
IMAGETYPE_ICO |
18 |
IMAGETYPE_WEBP |
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';
}
?>