/**
* Returns the singleton instance of the class.
*
* @since 1.0.0
*
* @return object The TGM_Utils object.
*/
public static function get_instance()
{
if (!isset(self::$instance) && !self::$instance instanceof TGM_Utils) {
self::$instance = new TGM_Utils();
}
return self::$instance;
}
/**
* Helper function: Validate a value as boolean
*
* @since 2.5.0
*
* @static
*
* @param mixed $value Arbitrary value.
*
* @return bool
*/
public static function validate_bool($value)
{
if (!isset(self::$has_filters)) {
self::$has_filters = extension_loaded('filter');
}
if (self::$has_filters) {
return filter_var($value, FILTER_VALIDATE_BOOLEAN);
} else {
return self::emulate_filter_bool($value);
}
}