EXIF_IMAGETYPE(3) 1 EXIF_IMAGETYPE(3)
exif_imagetype - Determine the type of an image
SYNOPSIS
int exif_imagetype (string $filename)
DESCRIPTION
exif_imagetype(3) reads the first bytes of an image and checks its signature.
exif_imagetype(3) 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
o $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(3) returns in index 2 but exif_imagetype(3) is much faster.
Note
exif_imagetype(3) will emit an E_NOTICE and return FALSE if it is unable to read enough bytes from the file to determine the image
type.
CHANGELOG
+--------+----------------------+
|Version | |
| | |
| | Description |
| | |
+--------+----------------------+
| 5.3.0 | |
| | |
| | Added icon support. |
| | |
+--------+----------------------+
PREDEFINED CONSTANTS
The following constants are defined, and represent possible exif_imagetype(3) 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 |
| | |
+------+-----------------------------------------+
EXAMPLES
Example #1
exif_imagetype(3) example
<?php
if (exif_imagetype('image.gif') != IMAGETYPE_GIF) {
echo 'The picture is not a gif';
}
?>
SEE ALSO
image_type_to_mime_type(3), getimagesize(3).
PHP Documentation Group EXIF_IMAGETYPE(3)