thinkphp Source Read 3------behavior extension

Thinkphp the core of the framework is the CBD, that is, the core core+ behavior behavior+ Drive driver, the core is the core of the entire framework model, most of them are some base class, to rule, behavior is the behavior, It is called in the specified place to complete some specific behavioral functions, and the driver driver is similar to cache caching driver, MYSQLDB database driver, etc., complete the function

The behavior is detailed in 13.1 of the manual. I'm just going to write some examples. The method that invokes the behavior.

The calling method is tags ()

/** * processing Tag extension * @param string $tag * Tag name * @param mixed $params * Incoming parameter * @return mixed */function tag ($t    AG, & $params = NULL) {//system label Extension $extends = C (' extends. $tag);    Apply label Extension $tags = C (' tags. '. $tag); if (! empty ($tags)) {if (Empty ($tags [' _overlay ']) &&! empty ($extends)) {//merge extension//a        Rray_unique the duplicate value in the divisor group $tags = Array_unique (Array_merge ($extends, $tags));        } elseif (Isset ($tags [' _overlay '))} {//By setting ' _overlay ' =>1 override system label unset ($tags [' _overlay ']);    }} elseif (! empty ($extends)) {$tags = $extends; if ($tags) {if (app_debug) {G ($tag.            ' Start '); Trace (' ['. $tag.        ']--start--', ' ', ' INFO ');                }//Execute extension foreach ($tags as $key + $name) {if (! Is_int ($key)) {//Specify the full path of the behavior class for pattern expansion            $name = $key; } B ($name, $params); } if (App_debug) {//records the behavior of the execution log trace (' ['. $tag. ']--end--[RunTime: '. G ($tag. ' Start ', $tag. ' End ', 6).        ' s] ', ' ', ' INFO ');    }} else {//did not perform any behavior that returns false to false; }}

When tag is called, you can specify override system behavior. The B function is then invoked to instantiate the behavior object.

/** * Perform a behavior * * @param string $name *          behavior name * @param Mixed $params *          incoming parameter * @return void */function B ($name, & ; $params = NULL) {    if (Strpos ($name, '/')) {        list ($name, $method) = explode ('/', $name);    } else {
   
     $method = ' run ';    }    $class = $name. ' Behavior ';    if (app_debug) {        G (' Behaviorstart ');    }    $behavior = new $class ();    $behavior-$method ($params);    if (app_debug) {//record the behavior of the execution log        G (' behaviorend ');        Trace ($name. ' Behavior:: '. $method. ' [RunTime: '.] G (' Behaviorstart ', ' Behaviorend ', 6). ' s] ', ' ', ' INFO ');}    }
   

The B function can instantiate the behavior object and pass in the parameters required by the behavior. The parameters that the behavior requires can be changed in the configuration file config.php. and overrides the default parameters in the behavior.

The base class of the behavior in lib/conf/behavior.class.php

Protected $options = Array (); Parameters for saving behavior

__construct initializes the class, and the parameter is assigned a value. The main is the assignment, if it exists in the config.php, it is covered with config.php.

__get get parameter Get behavior parameter

Run Behavior unique Execution portal

In the B function, you can also manually specify the parameter execution portal by means of B (' class name/method name ')

The default behavior is:

Checkroute	Detect routing, route matching
Contentreplace	Template content Output substitution
Parsetemplate	Template parsing
Readhtmlcache	Static cache Reads
Showpagetrace	Page Trace Display
Showruntime	Run time display
Tokenbuild	Form token generation
WriteHTML	Static Cache writes

Extended Behavior has

Agentcheck	Agent Detection
Browsercheck	Browser detection, anti-refresh
Checkactionroute	Operational Route Detection
Checklang	Language detection, and automatic loading of language packs
Cronrun	Automatic tasks
Fireshowpagetrace	Output trace to Firefox's Firebug
Robotcheck	Robot detection (is to detect Baidu spiders, etc.)
Upgrade	Automatic escalation prompt behavior

Now write an example that everyone can understand.

In App.class.php, in the App::run method, there is a place to invoke the application initialization tag.

/**     * Shortcut method used to run the application instance Portal file     * @access public     * @return void *    /static public function run () {        //At the beginning of the project Start tag tag        (' App_init ');        App::init ();        Project start tag tag        (' App_begin ');        Session Initialization        session (C (' session_options '));        Log application initialization time        G (' inittime ');        App::exec ();        Item end tag Tag        (' App_end ');        return;    }

Now create a new AppinitBehavior.class.php in the project/lib/behavior.

<?phpclass Appinitbehavior extends behavior{    function run (& $param) {        echo ' app started ';    }}

And then in the project/conf/tags.php.

<?phpreturn Array (    ' App_init ' =>array (        ' Appinit '    ));

This way, when you run the project, the output app starts. Very convenient. If you want to modify, expand, directly modify the class or extension class, do not need to modify the source code, extensibility is very good.

Personal qq:2387813033, (Deanne Lei) QQ Group: 252799167

This article is from the "Deanne Lei" blog, please be sure to keep this source http://a3147972.blog.51cto.com/2366547/1413619