exif_imagetype

exif_imagetype

Determine the type of an image

 **exif_imagetype** string $filename

 reads the first bytes of an image and
checks its signature.

exif_imagetype

 can be used to avoid calls to other
 functions with unsupported file types
or in conjunction with  to check
whether or not the viewer is able to see a specific image in the browser.

exif_imagetypeexif$_SERVER['HTTP_ACCEPT']

filenameThe image being checked.

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  returns in index 2 but
 is much faster.

getimagesize``exif_imagetype

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

exif_imagetype

Opmerking: > will emit an and return false if it is unable to read enough bytes from the file to determine the image type.

`exif_imagetype``E_NOTICE`

Voorbeeld: example

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

image_type_to_mime_type``getimagesize