小结：OneThink里面的钩子初始化到运行的流程

下面的介绍如果想看懂，最好是打开代码一起调试着看，否则很难看明白，因为里面很多地方使用到的函数或者方法，我都只是说明了其位置，而没把代码复制到文章里面来。

从项目入口index.php开始，然后 require './ThinkPHP/ThinkPHP.php'; 进入./ThinkPHP/ThinkPHP.php 在定义了一大段常量（见页尾附带数据）之后，最后执行了

Think\Think::start();///代码在"ThinkPHP/Library/Think/Think.class.php"里面

下面的代码是在开启debug配置的时候才会生效

下面查看/ThinkPHP/Library/Think/Think.class.php，在其48行，导入了初始化配置文件

$mode   =   include is_file(CONF_PATH.'core.php')?CONF_PATH.'core.php':MODE_PATH.APP_MODE.'.php';
//实际是 $mode = include './ThinkPHP/Mode/common.php';

50~55行，则加载了$mode['core']里面的各个文件。

76~78行，通过Hook::import()把$mode['tags']里面数据导入到Hook::$tags里，此时通过Hook::get()，查看Hook::$tags

array(5) {
  ["app_begin"] => array(1) {
    [0] => string(22) "Behavior\ReadHtmlCache"
  }
  ["app_end"] => array(1) {
    [0] => string(22) "Behavior\ShowPageTrace"
  }
  ["view_parse"] => array(1) {
    [0] => string(22) "Behavior\ParseTemplate"
  }
  ["template_filter"] => array(1) {
    [0] => string(23) "Behavior\ContentReplace"
  }
  ["view_filter"] => array(1) {
    [0] => string(23) "Behavior\WriteHtmlCache"
  }
}

83行，则又将行为定义导入

Hook::import(include CONF_PATH.'tags.php'); 
//导入的是'./Application/Common/Conf/tags.php',里面包含的是一个数组
//array(
//	'app_init'=>array('Common\Behavior\InitHook')
//);

根据Hook::import()可知，此刻就是将新导入的数据与原有的数据做array_merge，Hook::$tags的数据为：

array(6) {
  ["app_begin"] => array(1) {
    [0] => string(22) "Behavior\ReadHtmlCache"
  }
  ["app_end"] => array(1) {
    [0] => string(22) "Behavior\ShowPageTrace"
  }
  ["view_parse"] => array(1) {
    [0] => string(22) "Behavior\ParseTemplate"
  }
  ["template_filter"] => array(1) {
    [0] => string(23) "Behavior\ContentReplace"
  }
  ["view_filter"] => array(1) {
    [0] => string(23) "Behavior\WriteHtmlCache"
  }
  ["app_init"] => array(1) {
    [0] => string(24) "Common\Behavior\InitHook"
  }
}

117行，则执行了App::run()，（之前在50~55行导入了./ThinkPHP/Library/Think/App.class.php文件）,该方法中最开始就执行了

Hook::listen('app_init');

根据Hook::listen()代码发现其实也就是执行了

Hook::exec('Common\Behavior\InitHook')

根据Hook::exec()知道实际就是实例化Common\Behavior\InitHookBehavior()，然后调用了其中的run()方法，在该方法中，就可以看到从数据库里取出钩子挂载的数据，并且将其放入Hook::$tags中。数据为：

array(13) {
  ["app_begin"] => array(1) {
    [0] => string(22) "Behavior\ReadHtmlCache"
  }
  ["app_end"] => array(1) {
    [0] => string(22) "Behavior\ShowPageTrace"
  }
  ["view_parse"] => array(1) {
    [0] => string(22) "Behavior\ParseTemplate"
  }
  ["template_filter"] => array(1) {
    [0] => string(23) "Behavior\ContentReplace"
  }
  ["view_filter"] => array(1) {
    [0] => string(23) "Behavior\WriteHtmlCache"
  }
  ["app_init"] => array(1) {
    [0] => string(24) "Common\Behavior\InitHook"
  }
  ["documentEditForm"] => array(1) {
    [0] => string(10) "Attachment"
  }
  ["documentDetailAfter"] => array(2) {
    [0] => string(10) "Attachment"
    [1] => string(13) "SocialComment"
  }
  ["documentSaveComplete"] => array(1) {
    [0] => string(10) "Attachment"
  }
  ["documentEditFormContent"] => array(1) {
    [0] => string(6) "Editor"
  }
  ["adminArticleEdit"] => array(1) {
    [0] => string(14) "EditorForAdmin"
  }
  ["AdminIndex"] => array(3) {
    [0] => string(8) "SiteStat"
    [1] => string(10) "SystemInfo"
    [2] => string(7) "DevTeam"
  }
  ["topicComment"] => array(1) {
    [0] => string(6) "Editor"
  }
}

下面就是使用钩子函数来触发钩子执行了，以后台首页的hook('AdminIndex')为例。

function hook($hook,$params=array()){
    \Think\Hook::listen($hook,$params);
}

这样就执行了AdminIndex钩子，必须配合代码看。笔记完毕。在Thinkphp框架里面不管那些名词离我们多远，功能听起来有多高端，比如路由，钩子，行为等，看完源代码，发现最终要实现，不是函数就是方法，不可能有别的方式，所以没必要感觉很深奥而不敢去学习分析其源代码。

附带下项目自定常量

array(57) {
  ["APP_PATH"] => string(14) "./Application/"
  ["RUNTIME_PATH"] => string(10) "./Runtime/"
  ["MEMORY_LIMIT_ON"] => bool(true)
  ["THINK_VERSION"] => string(5) "3.2.0"
  ["URL_COMMON"] => int(0)
  ["URL_PATHINFO"] => int(1)
  ["URL_REWRITE"] => int(2)
  ["URL_COMPAT"] => int(3)
  ["EXT"] => string(10) ".class.php"
  ["THINK_PATH"] => string(37) "/mnt/hgfs/code/onethinktest/ThinkPHP/"
  ["APP_STATUS"] => string(0) ""
  ["APP_DEBUG"] => bool(false)
  ["APP_MODE"] => string(6) "common"
  ["STORAGE_TYPE"] => string(4) "File"
  ["LIB_PATH"] => string(45) "/mnt/hgfs/code/onethinktest/ThinkPHP/Library/"
  ["CORE_PATH"] => string(51) "/mnt/hgfs/code/onethinktest/ThinkPHP/Library/Think/"
  ["BEHAVIOR_PATH"] => string(54) "/mnt/hgfs/code/onethinktest/ThinkPHP/Library/Behavior/"
  ["MODE_PATH"] => string(42) "/mnt/hgfs/code/onethinktest/ThinkPHP/Mode/"
  ["VENDOR_PATH"] => string(52) "/mnt/hgfs/code/onethinktest/ThinkPHP/Library/Vendor/"
  ["COMMON_PATH"] => string(21) "./Application/Common/"
  ["CONF_PATH"] => string(26) "./Application/Common/Conf/"
  ["LANG_PATH"] => string(26) "./Application/Common/Lang/"
  ["HTML_PATH"] => string(19) "./Application/Html/"
  ["LOG_PATH"] => string(15) "./Runtime/Logs/"
  ["TEMP_PATH"] => string(15) "./Runtime/Temp/"
  ["DATA_PATH"] => string(15) "./Runtime/Data/"
  ["CACHE_PATH"] => string(16) "./Runtime/Cache/"
  ["MAGIC_QUOTES_GPC"] => bool(false)
  ["IS_CGI"] => int(0)
  ["IS_WIN"] => int(0)
  ["IS_CLI"] => int(0)
  ["_PHP_FILE_"] => string(23) "/onethinktest/index.php"
  ["__ROOT__"] => string(13) "/onethinktest"
  ["ONETHINK_VERSION"] => string(10) "1.0.131218"
  ["ONETHINK_ADDON_PATH"] => string(9) "./Addons/"
  ["MODULE_PATHINFO_DEPR"] => string(1) "/"
  ["__INFO__"] => string(22) "admin/index/index.html"
  ["__EXT__"] => string(4) "html"
  ["__SELF__"] => string(49) "/onethinktest/index.php?s=/admin/index/index.html"
  ["MODULE_NAME"] => string(5) "Admin"
  ["MODULE_PATH"] => string(20) "./Application/Admin/"
  ["PHP_FILE"] => string(26) "/onethinktest/index.php?s="
  ["__APP__"] => string(26) "/onethinktest/index.php?s="
  ["__MODULE__"] => string(32) "/onethinktest/index.php?s=/admin"
  ["CONTROLLER_NAME"] => string(5) "Index"
  ["ACTION_NAME"] => string(5) "index"
  ["__CONTROLLER__"] => string(38) "/onethinktest/index.php?s=/admin/index"
  ["__ACTION__"] => string(44) "/onethinktest/index.php?s=/admin/index/index"
  ["NOW_TIME"] => int(1399875697)
  ["REQUEST_METHOD"] => string(3) "GET"
  ["IS_GET"] => bool(true)
  ["IS_POST"] => bool(false)
  ["IS_PUT"] => bool(false)
  ["IS_DELETE"] => bool(false)
  ["IS_AJAX"] => bool(false)
  ["UID"] => string(1) "1"
  ["IS_ROOT"] => bool(true)
}