FlyingDR / struct

                        // Class name for validation

                        $value = $v;

                        $valid = true;

                    } elseif (method_exists($this, $v)) {

                        // Name of validation method

                        $value = [$this, $v];

                        $valid = true;

                    } else {

                        // Explicitly given list of valid values

                        $valid = true;

                    }

                    if (class_exists($value)) {

                        // Explicitly given class name for validation

                        $valid = true;

                    } elseif (method_exists($this, $value)) {

                        // Explicitly given name of validation method

                        $value = [$this, $value];

                        $valid = true;

                    }

                } /** @noinspection NotOptimalIfConditionsInspection */ elseif (is_array($value)) {

                    // Explicitly given list of valid values

                    $valid = true;