TinkPHP framework learning-02 basic operation of the controller

　　　　　　　　　　　　　　　　　 1-----Create a controller

　　　　　　　　　　　　　　　　　 2-----Visit the view page

　　　　　　　　　　　　　　　　　　3-----Register variables to the view page

　　　　　　　　　　　　　　　　　　4-----Get form data

1. Create a controller under the Home module

Example: Create Test Controller.class.php in the 　　　　directory tp/Application/ Home/ Controller r

　　　　　　　　　Access the controller localhost/i/tp/Home/Test/ action method

<?php
namespace Home\Controller;
use Think\Controller;
class TestController extends Controller {
    
    public function test(){
        echo "hello!";
    }
     // Access the method hello    
　　　//http://localhost/i/tp/index.php/Home/Test/test 
}

　　　　　　Blog from "Wannian", address: http://www.cnblogs.com/wannian/p/8998141.html

Two access method display view page

--In the View folder under 　　　　the Home module

　　　　--Create a new folder with the same name as the controller, and create a view page under this folder

　　　　E.g:

--If there is a Test Controller.class.php controller in the 　　　　　　Home/Controller folder , and the controller has a ceshi method, that is, the ceshi() method in the TestController class under the Test controller

There is $this->show()　　　　　　in the --ceshi method　　 ; access the view page corresponding to the method in the view folder corresponding to the controller

　　　　　　--Then create the Test folder under the Home/View folder and create the view page ceshi.html

　　　　　　--The way to access this page is: localhost/i/tp/index.php/Home/Test/ ceshi() method under TestController class of Test( TestController.class,php ) controller under i Home module

<?php
namespace Home\Controller;
use Think\Controller;
class TestController extends Controller {
    public function ceshi(){
        $this->show();
    }
}

Three register variables to the view page

　　　　①-- Method in TP framework:

　　　　　　　　-- Register variables in the controller method $this->assign("variable name", "variable value");　　　

　　　　　　　　　　　　　　　　Such as:　　$this ->assign( 'uname' , ' Zhang San ' );

　　　　　　　　-- View page access method {$ variable name} Write $ symbol and variable name in curly brackets, no spaces, line breaks, etc.　

　　　　　　　　　　　　　　　　For example:　　{$uname}　　　

　　　　②-- If the registered variable is an array, get method:　{$arr['0']}　or {$arr['id']}

　　　　③--cycle output

　　　　　　　　-- <foreach> tag , TP-specific loop output

　　　　　　　　-- The value of name is the variable name (the same as the variable name in the method), the value of item is the value of the obtained array (custom naming)

　　　　　　　　-- register an array

    public function test(){
        $arr=array(
          array("code"=>"n001","name"=>"汉族"),
          array("code"=>"n002","name"=>"天族")
        );
        $this->assign("nation",$arr);
        $this->show();

    }

　　　　　　　　-- Front-end acquisition

 <select>
       <foreach name="nation" item="v">
            <option value='{$v.code}'>{$v.name}</option>
       </foreach>
 </select>

　　　　④--if judgment

　　　　　　　　-- <if> tag and else tag , TP-specific front-end judgment

-- The value of the condition attribute in the 　　　　　　　　<if> tag is the judgment condition ,

--The variable name　　　　　　　　　　 in the judgment condition needs to be prefixed with $ , for example, a registered variable name is id and the value is 0, then the judgment id should be condition=" $id==0 "

　　　　　　　　　　　　　　For example, register the variable in the test method $this->assign("dc",0);

　　　　　　　　　　　　　　The front-end page judges and outputs, because dc is not equal to 1, the page displays Li Si

        <if condition="$dc==1">
              <b>张三</b>
          <else />
              <i>李四</i>
        </if>

　　　　　⑤-- The <literal> tag is displayed as it is , and the <if> tag <foreach> tag is written in the tag and does not execute judgment and loop

Four get form data　　　　　

　　　　①-- Get the path of the method through the get_defined_constants(true); method and return a two-dimensional associative array

　　　　　　　　--path is in 'user' so var_dump(get_defined_constants(true)['user']);

　　　　　　　　-- __ROOT__ root path of TP framework

　　　　　　　　-- __SELF__ path to own method

　　　　　　　　-- __APP__ entry directory

　　　　　　　　-- __MODULE__ current module path

　　　　　　　　-- __CONTROLLER__ to the controller's directory

　　　　　　　　-- __ACTION__ to the action method directory

　　　　②-- The front end creates the view page sub.html and writes it into the form form, and the submission address is the operation method directory __ACTION__ of this page

<form action="__ACTION__" method="post">
    <input type="text" name="uid">
    <input type="password" name="pwd">
    <input type="submit" value="登录">
</form>

　　　　③-- Some sub methods in the Test controller get data

    public  function sub () {

        if ( empty ( $_POST )){
             $this -> show();
             // If the POST is empty, continue to display the submission page 
        } else {
             echo  $_POST ['uid' ];
             // If there is a POST, operate on it, Or output or store in database, etc. 
        }
         var_dump ( get_defined_constants ( true )['user' ]);
    }

TinkPHP framework learning-02 basic operation of the controller

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