The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.
PHPDBG_VERSION
(string) PHPDBG_FILE
(int) PHPDBG_METHOD
(int) PHPDBG_LINENO
(int) PHPDBG_FUNC
(int) PHPDBG_COLOR_PROMPT
(int) PHPDBG_COLOR_NOTICE
(int) PHPDBG_COLOR_ERROR
(int)