预定义常量
下列常量由此扩展定义，且仅在此扩展编译入 PHP 或在运行时动态载入时可用。
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)
