imagetypes
Name
imagetypes — Determines PHP-supported image formats.
Returns
Bit-field of supported image formats
Description
Different versions and builds of GD support a variety of
image types. imagetypes() provides a way to check
which formats are supported. The function accepts no
arguments and returns an integer bit field. See the table
below for a listing of image types and their
corresponding bit values.
Thus, if the value returned from imagetypes() is
12, your build of PHP supports the PNG and WBMP image
formats. You can check whether the constant that
correlates to the image is also defined to help determine
support for that image type. In the example below using
the bitwise & operator, if the value returned is 0
then no GIF support is enabled.
Version
Existing since version 4.0.2
Example
Example 448. Detect JPEG
format support
if (imagetypes() & IMG_GIF) {
echo "GIF support in build";
} else {
echo "No GIF support in build";
}
PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing
(Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch).
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