PHP Manuál
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imagetypes

(PHP 3 CVS only, PHP 4 >= 4.0.2)

imagetypes -- Return the image types supported by this PHP build

Description

int imagetypes ( void )

This function returns a bit-field corresponding to the image formats supported by the version of GD linked into PHP. The following bits are returned, IMG_GIF | IMG_JPG | IMG_PNG | IMG_WBMP. To check for PNG support, for example, do this:

Príklad 1. imagetypes() example

<?php
if (imagetypes() & IMG_PNG) {
    echo "PNG Support is enabled";
}
?>

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imagettftextHoreimagewbmp