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# CXXXIX. runkit Functions

# 简介

The runkit extension provides means to modify constants, user-defined functions, and user-defined classes. It also provides for custom superglobal variables and embeddable sub-interpreters via sandboxing.

安装此 PECL 扩展库的信息可在手册中标题为 PECL 扩展库安装的一章中找到。 更多信息如新版本，下载，源文件，维护者信息以及更新日志等可以在这里找到： http://pecl.php.net/package/runkit.

This package is meant as a feature added replacement for the classkit package. When compiled with the `--enable-runkit=classkit` option to ./configure, it will export classkit compatible function definitions and constants.

# 安装

本 PECL 扩展未绑定于 PHP 中。

安装此 PECL 扩展库的信息可在手册中标题为 PECL 扩展库安装的一章中找到。 更多信息如新版本，下载，源文件，维护者信息以及更新日志等可以在这里找到： http://pecl.php.net/package/runkit.

可以从 PHP 下载页面或者 http://snaps.php.net/ 下载此 PECL 扩展的 DLL 文件。

# 需求

Modifying Constants, Functions, Classes, and Methods works with all releases of PHP 4 and PHP 5. No special requirements are necessary.

Custom Superglobals are only available in PHP 4.2.0 or later.

Sandboxing requires PHP 5.1.0 or later, or PHP 5.0.0 with a special TSRM patch applied. Regardless of which version of PHP is in use it must be compiled with the `--enable-maintainer-zts` option. See the `README` file in the runkit package for additional information.

# 运行时配置

这些函数的行为受 `php.ini` 的影响。

表 1. Runkit Configuration Options

Name | Default | Changeable | Changelog
--- | --- | --- | ---
runkit.superglobal | "" | PHP_INI_PERDIR |
runkit.internal_override | "0" | PHP_INI_SYSTEM |

有关 PHP_INI_* 常量进一步的细节与定义参见附录 H。

以下是配置选项的简要解释。

`runkit.superglobal` string

  Comma-separated list of variable names to be treated as superglobals. This value should be set in the systemwide php.ini file, but may work in perdir configuration contexts depending on your SAPI.

  例 1. Custom Superglobals with runkit.superglobal=_FOO,_BAR in php.ini

  `<?php function show_values() { echo "Foo is $_FOO\n"; echo "Bar is $_BAR\n"; echo "Baz is $_BAZ\n"; } $_FOO = 'foo'; $_BAR = 'bar'; $_BAZ = 'baz'; /* Displays foo and bar, but not baz */ show_values(); ?>`

# 预定义常量

以下常量由本扩展模块定义，因此只有在本扩展模块被编译到 PHP 中，或者在运行时被动态加载后才有效。

`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.

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