生命周期钩子

PHP提供了几个生命周期事件，这些扩展可以用来执行常见的初始化或关闭任务。 通常，Zephir在这些事件中自己的钩子会覆盖所有设置，并删除您需要的扩展，但是如果您发现需要做更多的事情，可以使用一些选项将您自己的代码传递到这些相同的钩子中。

考虑下面的图表:

生命周期钩子注册在config.json。 如上图所示，有四种生命周期钩子 — globals， initializers，destructors，info。 Each of these has its own corresponding root-level setting in the configuration, and both globals and info have their own chapters. 本章将介绍另外两种设置。

每个钩子在config.json文件是一个对象数组，其本身本质上是include/code对。 include值，如果还没有，则会拉入一个给定的C头文件，这样code就可以访问它的内容。 The code value is the logic run by the hook itself, and while you can technically put any valid C in here, it is strongly recommended to put logic longer than one or two lines into a separate C source file (such as the one pulled in along with your included header file), and use a single-line function call here.

initializers

initializers 块如下所示:

{
    "initializers": [
        {
            "globals": [
                {
                    "include": "my/awesome/library.h",
                    "code": "setup_globals_deps(TSRMLS_C)"
                }
            ],
            "module": [
                {
                    "include": "my/awesome/library.h",
                    "code": "setup_module_deps(TSRMLS_C)"
                }
            ],
            "request": [
                {
                    "include": "my/awesome/library.h",
                    "code": "some_c_function(TSRMLS_C)"
                },
                {
                    "include": "my/awful/library.h",
                    "code": "some_other_c_function(TSRMLS_C)"
                }
            ]
        }
    ]
}

这个块负责定义到上面图中显示的Init事件的钩子。 其中有三个:globals用于设置全局变量空间;module用于设置扩展本身需要功能的任何内容;request用于设置扩展来处理单个请求。

destructors

destructors 块如下所示:

{
    "destructors": [
        {
            "request": [
                {
                    "include": "my/awesome/library.h",
                    "code": "c_function_for_shutting_down(TSRMLS_C)"
                },
                {
                    "include": "my/awful/library.h",
                    "code": "some_other_c_function_than_the_other_ones(TSRMLS_C)"
                }
            ],
            "post-request": [
                {
                    "include": "my/awesome/library.h",
                    "code": "c_function_for_cleaning_up_after_the_response_is_sent(TSRMLS_C)"
                }
            ],
            "module": [
                {
                    "include": "my/awesome/library.h",
                    "code": "release_module_deps(TSRMLS_C)"
                }
            ],
            "globals": [
                {
                    "include": "my/awesome/library.h",
                    "code": "release_globals_deps(TSRMLS_C)"
                }
            ]
        }
    ]
}

Much as the initializers block is responsible for defining hooks into the Init events shown in the diagram above, this block is responsible for defining hooks into the Shutdown events. 有四个:request响应之前敲定任何数据发送到客户端,post-request清理响应被发送后,module</0 >模块扩展后的清理本身PHP进程关闭之前, 和<code>globals清理全局变量空间。