/**
* Checks if GD is enabled and verify that key methods exist, some of which require GD to
* be bundled with PHP. Exceptions will be thrown from those methods when GD is not
* bundled.
*
* @return boolean
*/
public static function check()
{
if (!function_exists('gd_info')) {
die('GD is either not installed or not enabled, check your configuration');
}
$functions = array(GD::IMAGEROTATE, GD::IMAGECONVOLUTION, GD::IMAGEFILTER, GD::IMAGELAYEREFFECT);
foreach ($functions as $function) {
GD::$_available_functions[$function] = function_exists($function);
}
if (defined('GD_VERSION')) {
// Get the version via a constant, available in PHP 5.2.4+
$version = GD_VERSION;
} else {
// Get the version information
$info = gd_info();
// Extract the version number
preg_match('/\\d+\\.\\d+(?:\\.\\d+)?/', $info['GD Version'], $matches);
// Get the major version
$version = $matches[0];
}
if (!version_compare($version, '2.0.1', '>=')) {
die('GD requires GD version 2.0.1 or greater, you have ' . $version);
}
return GD::$_checked = TRUE;
}
