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ThinkPHP32 loading process (1)

WBOYOriginal: 2016-08-08 09:23:341005browse

Loading process (official introduction) :

The user URL requests 
Call the application entry file (usually the website’s index.php)
Load the framework entry file ( ThinkPHP.php)
Record initial running time and memory overhead
System constant judgment and definition
Load the framework boot class (Think Think) and execute the Think::start method to initialize the application
Set the error handling mechanism and automatic loading mechanism
Call ThinkStorage Class performs storage initialization (the storage type is defined by the STORAGE_TYPEconstant)
In deployment mode, if there is an application compilation cache file, it will be loaded directly (jump directly to step 22) 
Read the definition file of the application mode (defined by the APP_MODE constant) (the following uses normal mode as an example) 
Load the core file defined by the current application mode (normal mode is ThinkPHP/Mode/common.php)
load the custom configuration file (normal mode is ThinkPHP/Conf/ convention.php)
load application configuration file (normal mode is Application/Common/Conf/ config.php ) 
Load system alias definition 
 Judge and read the application alias definition file (normal mode is Application /Common/ Conf/alias.php)
Loading system behavior definition
Judge and read the application behavior definition file (normal mode is Application/Common/Conf/tags.php)
Load the underlying language package of the framework (normal mode is ThinkPHP /Lang/zh-cn.php)
If it is deployment mode then Generate application compilation cache file
Load the debug mode system configuration file (ThinkPHP/Conf/debug.php)
Judge and read the application’s debug configuration file ( The default is Application/Common/Conf/debug.php)
Determine the application status and read the status configuration file (if APP_STATUSconstant definition is not empty)
 detects the application directory structure and automatically generates it (if the CHECK_APP_DIR configuration is turned on and the RUNTIME_PATH directory does not exist)
 Call the run method of the ThinkApp class to start the application 
The application initialization (app_init) tag bit listens and performs the binding behavior 
Determine and load dynamic configuration and function files
Call the ThinkDispatcher::dispatch method to perform URLrequest dispatch
Automatic identification and compatibility The $_SERVER['PATH_INFO'] parameter under URL mode and command line mode 
 detects domain name deployment and completes the binding operation of modules and controllers (APP_SUB_DOMAIN_DEPLOY Parameters on) 
Analyze the PATH_INFO information in the URL address
Get the requested module information
Detect whether the module exists and allow access 
Judge and load module configuration files, alias definitions, behavior definitions and function files
Judge and load the module’s dynamic configuration and function files
Module’s URLMode judgment
The module’s route detection (URL_ROUTER_ON is turned on)
PATH_INFOprocessing (path_info) tag bit listening and performing binding behavior
URL Suffix detection (URL_DENY_SUFFIX and URL_HTML_SUFFIXhandling) 
Get the current controller and action, and URLother parameters
URLRequest scheduling completed (url_dispatch) The tag bit listens and performs binding actions 
 The application starts (app_begin) The tag bit listens and performs binding actions 
Call SE SSION_OPTIONS Configuration parameters for Session initialization (if not in command line mode) 
Execute the controller method according to the request
If the controller does not exist, detect whether the empty controller exists
The controller starts (action_begin) tag bit listening and executes the binding behavior
By default, the system's ReadHtmlCache behavior is called to read the static cache (HTML_CACHE_ONparameter turned on) 
 Judge and call the _initialize initialization method of the controller 
 Judge whether the operation method exists, if not, detect whether the empty operation method is defined 
 Determine whether the pre-operation method is defined, and if so, perform 
Action parameter binding detection to automatically match the parameters of the operation method 
 if there is template rendering (call the controller display method ) 
View start (view_begin) tag bit listens and performs binding behavior
Call the ThinkView's fetch method to parse and get the model Edition content 
 Automatically identify the current theme and locate the template file 
View parsing (view_parse) tag bit listens and performs binding actions 
Default call Built-in ParseTemplatebehavior analysis template (under normal mode)
The template engine generates a template cache after parsing the template content
Template filter replacement (template_filter) tag bit listens and executes binding Default behavior 
default calls the system’s ContentReplace behavior for template replacement
output content filtering (view_filter) tag bit listening and executing binding behavior 
Default calls the system's WriteHtmlCache behavior to write to the static cache (HTML_CACHE_ON parameter is turned on) 
Call ThinkView class r The ender method outputs the rendering content 
View end (view_end) tag listens and performs binding behavior
Determine whether the post operation method is defined, and if so, execute it
The controller end (action_end) tag bit listens and executes the binding action 
The application end (app_end) tag bit listens and executes the binding action 
 Execute the system's ShowPageTrace behavior (SHOW_PAGE_TRACE parameter is turned on and is not an AJAX request) 
Log information storage writing

Code:

　1. Entry file (index.php)

// 检测PHP环境
if(version_compare(PHP_VERSION,'5.3.0','<'))  die('require PHP > 5.3.0 !');

// 开启调试模式 建议开发阶段开启 部署阶段注释或者设为false
define('APP_DEBUG',True);

// 定义应用目录
define('APP_PATH','./Application/');

// 引入ThinkPHP入口文件
require './ThinkPHP/ThinkPHP.php';

Function 1. Set whether it is debug mode (in debug mode, when APP_DEBUG is True, the last compiled one is ~runtime.php. In the case of development, it is recommended to start Debug mode)

　 2. Define the path of APP_PATH

　 3. It is also the most important one. The entrance to ThinkPHP is introduced. From here, the complex and simple TP framework journey officially begins. Those who do not have the equipment can bring the equipment and brush the TP framework.

I follow the TP source code and introduce how the page appears without making any modifications to the TP

( PS: Since it is my first time to learn the TP framework and also just started to learn PHP, I hope to write a little of my own here. My experience is to sort out my own thoughts. I also hope it can help everyone. If there are any mistakes, I hope you can point them out)

The above introduces the ThinkPHP32 loading process (1), including aspects of the content. I hope it will be helpful to friends who are interested in PHP tutorials.

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