class->extends) { $this->parent_class = self::getAbsoluteClassFromName($this->class->extends, $this->namespace, $this->aliased_classes); } foreach ($class->implements as $interface_name) { $absolute_interface_name = self::getAbsoluteClassFromName($interface_name, $this->namespace, $this->aliased_classes); self::$class_implements[$absolute_class][strtolower($absolute_interface_name)] = $absolute_interface_name; } } /** * Determine whether or not a given class exists * * @param string $absolute_class * @return bool */ public static function classExists($absolute_class) { if (isset(self::$existing_classes_ci[strtolower($absolute_class)])) { return self::$existing_classes_ci[strtolower($absolute_class)]; } if (in_array($absolute_class, self::$SPECIAL_TYPES)) { return false; } if (class_exists($absolute_class)) { $reflected_class = new \ReflectionClass($absolute_class); self::$existing_classes_ci[strtolower($absolute_class)] = true; self::$existing_classes[$reflected_class->getName()] = true; return true; } // we can only be sure that the case-sensitive version does not exist self::$existing_classes[$absolute_class] = false; return false; } /** * Determine whether or not a class has the correct casing * * @param string $absolute_class * @return bool */ public static function hasCorrectCasing($absolute_class) { if (!self::classExists($absolute_class)) { throw new \InvalidArgumentException('Cannot check casing on nonexistent class ' . $absolute_class); } return isset(self::$existing_classes[$absolute_class]); } /** * Determine whether or not a class extends a parent * * @param string $absolute_class * @param string $possible_parent * @return bool */ public static function classExtends($absolute_class, $possible_parent) { if (isset(self::$class_extends[$absolute_class][$possible_parent])) { return self::$class_extends[$absolute_class][$possible_parent]; } if (!self::classExists($absolute_class) || !self::classExists($possible_parent)) { return false; } if (!isset(self::$class_extends[$absolute_class])) { self::$class_extends[$absolute_class] = []; } self::$class_extends[$absolute_class][$possible_parent] = is_subclass_of($absolute_class, $possible_parent); return self::$class_extends[$absolute_class][$possible_parent]; } /** * Get all the interfaces a given class implements * * @param string $absolute_class * @return array */ public static function getInterfacesForClass($absolute_class) { if (!isset(self::$class_implements[$absolute_class])) { /** @var string[] */ $class_implements = class_implements($absolute_class); self::$class_implements[$absolute_class] = []; foreach ($class_implements as $interface) { self::$class_implements[$absolute_class][strtolower($interface)] = $interface; } } return self::$class_implements[$absolute_class]; } /** * Check whether a class implements an interface * * @param string $absolute_class * @param string $interface * @return bool */ public static function classImplements($absolute_class, $interface) { $interface_id = strtolower($interface); if (isset(self::$class_implements[$absolute_class][$interface_id])) { return true; } if (isset(self::$class_implements[$absolute_class])) { return false; } if (!ClassChecker::classExists($absolute_class)) { return false; } if (in_array($interface_id, self::$SPECIAL_TYPES)) { return false; } $class_implementations = self::getInterfacesForClass($absolute_class); return isset($class_implementations[$interface_id]); } public static function clearCache() { self::$existing_classes = []; self::$existing_classes_ci = []; self::$class_extends = []; MethodChecker::clearCache(); } }