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exif_imagetype
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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() 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.

ChangeLog

VersionDescription
4.3.2 Support for JPC, JP2, JPX, JB2, XBM, and WBMP
4.3.0Support for SWC

Predefined Constants

The following constants are defined, and represent possible exif_imagetype() return values:

Table 1. Imagetype Constants

ValueConstant
1IMAGETYPE_GIF
2IMAGETYPE_JPEG
3IMAGETYPE_PNG
4IMAGETYPE_SWF
5IMAGETYPE_PSD
6IMAGETYPE_BMP
7IMAGETYPE_TIFF_II (intel byte order)
8 IMAGETYPE_TIFF_MM (motorola byte order)
9IMAGETYPE_JPC
10IMAGETYPE_JP2
11IMAGETYPE_JPX
12IMAGETYPE_JB2
13IMAGETYPE_SWC
14IMAGETYPE_IFF
15IMAGETYPE_WBMP
16IMAGETYPE_XBM

Examples

Example 1. exif_imagetype() example

<?php
if (exif_imagetype('image.gif') != IMAGETYPE_GIF) {
    echo 'The picture is not a gif';
}
?>

See Also

getimagesize()

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