Php/docs/function.exif-imagetype
exif_imagetype
(PHP 4 >= 4.3.0, PHP 5, PHP 7)
exif_imagetype — Determine the type of an image
Description
exif_imagetype
( string $filename
) : int|false
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.
Note:
exif_imagetype() will emit an
E_NOTICE
and returnFALSE
if it is unable to read enough bytes from the file to determine the image type.
Changelog
Version | Description |
---|---|
7.1.0 | Added WebP support. |
Predefined Constants
The following constants are defined, and represent possible exif_imagetype() return values:
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
|
Examples
Example #1 exif_imagetype() example
<?phpif (exif_imagetype('image.gif') != IMAGETYPE_GIF) { echo 'The picture is not a gif';}?>
See Also
- image_type_to_mime_type() - Get Mime-Type for image-type returned by getimagesize, exif_read_data, exif_thumbnail, exif_imagetype
- getimagesize() - Get the size of an image