How to call a default layout for every module and how to work <php echo $content; ?>

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Hi Friends, Hi Friends, Some common question is difficult to how to create the layout on yii and how to work

<?php echo $content; ?>

so in this tutorial you may help the create the common layout..and understand the

<?php echo $content; ?>

=>In this tutorial default controller is Index Controller and default action is Index

1) so first you want to create the module on config/main.php file..

'modules'=>array(
                'gii'=>array(
                        'class'=>'system.gii.GiiModule',
                        //'password'=>'mmpandey',
                        'password'=>'admin',
                        'generatorPaths' => array(
                                'ext.giix-core', // giix generators
                        ),
                        'ipFilters'=>array('127.0.0.1','::1'),
                ),
                'rights'=>array( 'install'=>true, // Enables the installer.
                ),
                'admin',
                'customer',
                'api',
       
        ),

and then generate the module URL (defind config/main.php) is like http://localhost/demo/admin/index

'urlManager'=>array(
                        'urlFormat'=>'path',
                        //'showScriptName'=>false,
                        'rules'=>array(
                                'admin/'			=>'admin/index/index',
                                'admin/login'		=>'admin/index/login',
                                'admin/logout'		=>'admin/index/logout',
                                'admin/<controller:\w+>/<action:\w+>'=>'admin/<controller>/<action>',


                                'customer/'			=>'customer/index/index',
                                'customer/login'	=>'customer/login',
                                'customer/logout'	=>'customer/index/logout',
                                'customer/<controller:\w+>/<action:\w+>'=>'customer/<controller>/<action>',
        ),
                ),

2) i think the best way solution is you want to defined the defaultcontroller is indexcontroller and action index defined config/main.php

'defaultController'=>'index/index',

3) then after create the IndexController on module that extends the FrontCoreConteller apply the defult layout is main...

<?php

class IndexController extends FrontCoreController {

    /**
     * Declares class-based actions.
     */
    
    public function actionIndx() {
        echo "Lorume Ipsum........"
    }
}

4) Create the FrontCoreConterller.php

<?php
/**
 * Controller is the customized base controller class.
 * All controller classes for this application should extend from this base class.
 */
class FrontCoreController extends GxController
{
        public $layout='main';

        public function init()
        {
                parent::init();
        }
        
}

5)Finally you want to create the layout on modules folder

/views/layouts/main.php

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title><?php echo SystemConfig::getValue('site_title');?></title>
<link rel="stylesheet" type="text/css" href="<?php echo Yii::app()->request->baseUrl; ?>/css/main.css" />
<!--[if IE]><script src="js/html5.js"></script><![endif]-->
</head>

<body>
         <section class="wapper">
             <?php //p( yii::app()->customer)  ?>
                        <?php echo $this->renderPartial('//layouts/header');?>
                        <?php //echo $this->renderPartial('//layouts/slider');?>
                        
                        <?php echo $content;?>

                        <?php echo $this->renderPartial('//layouts/footer');?>
                        
     </section>
</body>
</html>

in this tutorial every time call a default controller is index and action is call index so all modules default layout is main.php and write any code on index action fetch the data on

<?php echo $content ; ?>

i hope you got the my point...