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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)