exif_imagetype
(PHP 4 >= 4.3.0, PHP 5)
exif_imagetype — Determine the type of an image
Description
int exif_imagetype
( string $filename
)
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.
Predefined Constants
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 |
Examples
Example #1 exif_imagetype() example
<?php
if (exif_imagetype('image.gif') != IMAGETYPE_GIF) {
echo 'The picture is not a gif';
}
?>
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