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