CakePHP Archives - Page 5 of 5

July 10, 2017April 28, 2019

How to Delete Records from Database Table in CakePHP

To delete a record in database, we first need to get hold of a table using the TableRegistry class. We can fetch the instance out of registry using the get() method. The get() method will take the name of the database table as an argument. Now, this new instance is used to get particular record that we want to delete.

Call the get() method with this new instance and pass the primary key to find a record which will be saved in another instance. Use the TableRegistry class’s instance to call the delete method to delete record from database.

Example

Make changes in the config/routes.php file as shown in the following code.

config/routes.php

<?php use CakeCorePlugin;
use CakeRoutingRouteBuilder;
use CakeRoutingRouter;
Router::defaultRouteClass(‘DashedRoute’);
Router::scope(‘/’, function (RouteBuilder $routes) { $routes->connect(‘/users/delete’,
[‘controller’ => ‘Users’, ‘action’ => ‘delete’]); $routes->fallbacks(‘DashedRoute’); });
Plugin::routes();

Create a UsersController.php file at src/Controller/UsersController.php. Copy the following code in the controller file.

src/controller/UsersController.php

<?php namespace AppController;
use AppControllerAppController;
use CakeORMTableRegistry;
use CakeDatasourceConnectionManager;
class UsersController extends AppController{ public function index(){ $users = TableRegistry::get(‘users’);
$query = $users->find(); $this->set(‘results’,$query); }
public function delete($id){ $users_table = TableRegistry::get(‘users’); $users = $users_table->get($id); $users_table->delete($users);
echo “User deleted successfully.”; $this->setAction(‘index’); } } ?>

Just create an empty View file under Users directory called delete.ctp.

src/Template/Users/delete.ctp

Create a directory Users at src/Template, ignore if already created, and under that directory create a View file called index.ctp. Copy the following code in that file.

src/Template/Users/index.ctp

Add User

Username

Password

Edit

Delete

Execute the above example by visiting the following URL and click on Delete link to delete record.

http://localhost:85/CakePHP/users

July 10, 2017April 28, 2019

Discuss on CakePHP Framework

CakePHP is an open-source framework for PHP. It is intended to make developing, deploying and maintaining applications much easier. CakePHP is based on an MVC-like architecture that is both powerful and easy to grasp. Models, Views, and Controllers guarantee a strict but natural separation of business logic from data and presentation layers.

CakePHP can be asked and both the community and core developers will get a chance to help and contribute. Please keep discussion friendly and constructive. Click here to join in CakePHP Official Forum

Cakephp official website: https://book.cakephp.org

July 10, 2017April 28, 2019

How to Handle Errors and Exception in CakePHP

Failure of system needs to be handled effectively for smooth running of the system. CakePHP comes with default error trapping that prints and logs error as they occur. This same error handler is used to catch Exceptions. Error handler displays errors when debug is true and logs error when debug is false. CakePHP has number of exception classes and the built in exception handling will capture any uncaught exception and render a useful page.

Errors and Exception Configuration

Errors and Exception can be configured in file configapp.php. Error handling accepts a few options that allow you to tailor error handling for your application −

Option	Data Type	Description
errorLevel	int	The level of errors you are interested in capturing. Use the built-in php error constants, and bitmasks to select the level of error you are interested in.
trace	bool	Include stack traces for errors in log files. Stack traces will be included in the log after each error. This is helpful for finding where/when errors are being raised.
exceptionRenderer	string	The class responsible for rendering uncaught exceptions. If you choose a custom class, you should place the file for that class in src/Error. This class needs to implement a render() method.
log	bool	When true, exceptions + their stack traces will be logged to CakeLogLog.
skipLog	array	An array of exception classnames that should not be logged. This is useful to remove NotFoundExceptions or other common, but uninteresting logs messages.
extraFatalErrorMemory	int	Set to the number of megabytes to increase the memory limit by when a fatal error is encountered. This allows breathing room to complete logging or error handling.

Example

Make changes in the config/routes.php file as shown in the following code.

config/routes.php

<?php use CakeCorePlugin; 
use CakeRoutingRouteBuilder; 
use CakeRoutingRouter; 
Router::defaultRouteClass('DashedRoute'); 
Router::scope('/', 
function (RouteBuilder $routes) { $routes->connect('/exception/:arg1/:arg2',[ 'controller'=>'Exps','action'=>'index'],['pass' => ['arg1', 'arg2']]); $routes->fallbacks('DashedRoute'); }); 
Plugin::routes();

Create ExpsController.php file at src/Controller/ExpsController.php. Copy the following code in the controller file.

src/Controller/ExpsController.php

<?php namespace AppController; 
use AppControllerAppController; 
use CakeCoreExceptionException; 
class ExpsController extends AppController{ public function index($arg1,$arg2){ try{ $this->set('argument1',$arg1); $this->set('argument2',$arg2); 
if(($arg1 < 1 || $arg1 > 10) || ($arg2 < 1 || $arg2 > 10)) throw new Exception("One of the number is out of range[1-10]."); }
catch(Exception $ex)
{ echo $ex->getMessage(); } } } ?>

Create a directory Exps at src/Template and under that directory create a View file called index.ctp. Copy the following code in that file.

src/Template/Exps/index.ctp

This is CakePHP tutorial and this is an example of Passed arguments. Argument-1: <?=$argument1?> Argument-2: <?=$argument2?>

Execute the above example by visiting the following URL.

http://localhost:85/CakePHP/exception/5/0

July 10, 2017April 28, 2019

How to Extend Views in CakePHP

Many times, while making web pages, we want to repeat certain part of pages in other pages. CakePHP has such facility by which one can extend view in another view and for this, we need not repeat the code again. The extend() method is used to extend views in View file. This method takes one argument, i.e., the name of the view file with path. Don’t use extension .ctp while providing the name of the View file.

Example

Make changes in the config/routes.php file as shown in the following program.

config/routes.php

<?php use CakeCorePlugin; 
use CakeRoutingRouteBuilder; 
use CakeRoutingRouter; 
Router::defaultRouteClass('DashedRoute'); 
Router::scope('/', function (RouteBuilder $routes) { $routes->connect('extend',['controller'=>'Extends','action'=>'index']); $routes->fallbacks('DashedRoute'); }); 
Plugin::routes();

Create a ExtendsController.php file at src/Controller/ExtendsController.php. Copy the following code in the controller file.

src/Controller/ExtendsController.php

<?php namespace AppController; use AppControllerAppController; class ExtendsController extends AppController{ public function index(){ } } ?>

Create a directory Extends at src/Template and under that folder create a View file called header.ctp. Copy the following code in that file.

src/Template/Extends/header.ctp

Common Header

<?= $this->fetch('content') ?>

Create another View under Extends directory called index.ctp. Copy the following code in that file. Here we are extending the above view header.ctp.

src/Template/Extends/index.ctp

<?php $this->extend('header'); ?>

This is an example of extending view.

Execute the above example by visiting the following URL.

http://localhost:85/CakePHP/extend

Output

Upon execution, you will receive the following output.