PHP-File:
<?php
echo phpversion();
echo "
";
var_dump(function_exists('imagewebp'));
Output:
5.6.0RC2
bool(false)
GD Support is enabled (GD Version:bundled (2.1.0 compatible))
Where is the problem? "imagewebp" should exist since PHP 5.5.0 (see: http://php.net/manual/en/function.imagewebp.php)
PS: (I'm not the only one... How to compile php to enable webp support?)