Introduction
Installing/Configuring
runkit
PHP Manual

# Predefined Constants

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.

`RUNKIT_IMPORT_FUNCTIONS` (integer)
  runkit_import flag indicating that normal functions should be imported from the specified file.
`RUNKIT_IMPORT_CLASS_METHODS` (integer)
  runkit_import flag indicating that class methods should be imported from the specified file.
`RUNKIT_IMPORT_CLASS_CONSTS` (integer)
  runkit_import flag indicating that class constants should be imported from the specified file. Note that this flag is only meaningful in PHP versions 5.1.0 and above.
`RUNKIT_IMPORT_CLASS_PROPS` (integer)
  runkit_import flag indicating that class standard properties should be imported from the specified file.
`RUNKIT_IMPORT_CLASSES` (integer)
  runkit_import flag representing a bitwise OR of the `RUNKIT_IMPORT_CLASS_*` constants.
`RUNKIT_IMPORT_OVERRIDE` (integer)
  runkit_import flag indicating that if any of the imported functions, methods, constants, or properties already exist, they should be replaced with the new definitions. If this flag is not set, then any imported definitions which already exist will be discarded.
`RUNKIT_ACC_PUBLIC` (integer)
  PHP 5 specific flag to runkit_method_add
`RUNKIT_ACC_PROTECTED` (integer)
  PHP 5 specific flag to runkit_method_add
`RUNKIT_ACC_PRIVATE` (integer)
  PHP 5 specific flag to runkit_method_add
`CLASSKIT_ACC_PUBLIC` (integer)
  PHP 5 specific flag to classkit_method_add Only defined when classkit compatibility is enabled.
`CLASSKIT_ACC_PROTECTED` (integer)
  PHP 5 specific flag to classkit_method_add Only defined when classkit compatibility is enabled.
`CLASSKIT_ACC_PRIVATE` (integer)
  PHP 5 specific flag to classkit_method_add Only defined when classkit compatibility is enabled.
`CLASSKIT_AGGREGATE_OVERRIDE` (integer)
  PHP 5 specific flag to classkit_import Only defined when classkit compatibility is enabled.
`RUNKIT_VERSION` (string)
  Defined to the current version of the runkit package.
`CLASSKIT_VERSION` (string)
  Defined to the current version of the runkit package. Only defined when classkit compatibility is enabled.