&reftitle.constants; &extension.constants; PHPDBG_VERSION (string) PHPDBG_FILE (int) Removed as of PHP 7.3.0. PHPDBG_METHOD (int) Removed as of PHP 7.3.0. PHPDBG_LINENO (int) Removed as of PHP 7.3.0. PHPDBG_FUNC (int) Removed as of PHP 7.3.0. PHPDBG_COLOR_PROMPT (int) PHPDBG_COLOR_NOTICE (int) PHPDBG_COLOR_ERROR (int)