Cakephp Interview Questions and Answers

Answer: Cake PHP started in April 2005.When a Polish programmer Michal Tatarynowicz wrote a minimal version of a Rapid Application Framework in PHP, dubbing it Cake.Cake PHP version 1.0 released in May 2006.  (source:http://en.wikipedia.org/wiki/CakePHP)

Answer: CakePHP  is a free, open-source, rapid development framework for PHP. It's a foundational structure for programmers to create web applications. There is number of in built component like Ajax, RequestHandler, Session etc  

Answer: The learning curve, and it loads full application before it starts your task. Its not recommended for small projects because of its resource heavy structure.

Answer: Model–view–controller (MVC) is an architectural pattern used in software engineering. Model: Databases function exist in the model View: Design parts written here Controller: Business Login

Answer: Default file name is database.php.default. Its located in "/app/config/database.php.defaut"

Answer: A component is an independent piece of code written for specific task that can be used(Eg Email, Ajax, RequestHandler and Session). A helper is used for helping cakephp in rendering the data to be shown to user with views(Eg Form, HTML etc).

Answer: Following are some components which is used in cakephp.   Security Sessions ACL(Access control lists) Auth(Authentication) Emails Cookies RequestHandling MVC architecture Built-in validations Caching scaffolding

Answer: Default controller is indexController.php and Default function isindex.  

Answer: http://example.com/controller/action/param1/param2/param3

Answer: There is two vendor folder, one folder in root and another is in "app" folder  

Answer:  find, findAll , findAllBy , findBy , findNeighbours and query.

Answer: Following are some feature of Cakephp. *Full support of (MVC)Model, View, Controller Architecture.*Scaffolding.*Very nice Code generation via Bake.*Helpers for HTML, Forms, Pagination, AJAX, Javascript, XML, RSS and more.*Access Control Lists and Authentication (ACL & Auth).*Router for mapping urls and handling extensions.*Security, Session, and RequestHandler Components.*Utility classes for working with Files, Folders, Arrays and more.*can manage multiple site(apps) developement.*Internationalization and Localization with static translations in gettext style or dynamic translations of model data.*Full Console environment with support for...

Answer: Here are the requirements for setting up a server to run CakePHP: An HTTP server (like Apache) with the following enabled: sessions, mod_rewrite (not absolutely necessary but preferred) PHP 4.3.2 or greater. Yes, CakePHP works great in either PHP 4 or 5. A database engine (right now, there is support for MySQL 4+, PostgreSQL and a wrapper for ADODB)

Answer: step1: Go to cakephp.org and download the latest version of cakephp. step2: Cakephp comes in a .zip file,so unzip it. step3: Extract the files in the localhost in the desired folder (for example:cakephp). step4: Open the browser and run the URL localhost/cakephp step5: Just Follow the instructions display on the page.

Answer: bootstrap.php yes it can be changed.Either through index.php , or through .htaccess  

Answer: -The Security.salt is used for generating hashes.we can change the default Security.salt value in /app/Config/core.php. - The Security.cipherseed is used for encrypt/decrypt strings.We can change the default Security.cipherSeed value by editing /app/Config/core.php.

Answer: Table names are plural and lowercased,model names are singular and CamelCased: ModelName, model filenames are singular and underscored: model_name.php, controller names are plural and CamelCased with *Controller* appended: ControllerNamesController, controller filenames are plural and underscored with *controller* appended: controller_names_controller.php,

Answer: Scaffolding is a technique that allows a developer to define and create a basic application that can create, retrieve, update and delete objects.

Answer: To add scaffolding to your application,just add the $scaffold variable in the controller, <?php class PostsController extends AppController {     var $scaffold; } ?>

Answer: Behaviors in CakePHP are associated with Models. Behaviors are used to change the way models behaves and enforcing model to act as something else.  

Answer: FormHelperHtmlHelperJsHelperCacheHelperNumberHelperPaginatorRSSSessionHelperTextHelperTimeHelper

Answer: Component is a Controller extension, Helpers are View extensions, Behavior is a Model Extension.

Answer: element in cakephp are smaller and reusable bits of view code. Elements are usually rendered inside views.  

Answer: Layout in cakephp are used to display the views that contain presentational code. In simple views are rendered inside a layout

Answer: var $layout = ‘layout_name’; to overwrite for a specific action use below code in that action $this->layout =”layout_name”;

Answer: public $helpers = array(‘Form’, ‘Html’, ‘Js’, ‘Time’); to in specific action use below code in that action $this->helper[] =”helper_name”;  

Answer: public $components = array(‘Emails’, ‘ImageUploader’, ‘Sms’);  

Answer: $this->Session->write(‘Bird.Color’, ‘Black’); $black = $this->Session->read(‘Bird.Color’); $this->Session->delete(‘Bird’);   

Answer: The set() method is used for creating a variable in the view file.Say for example if we write, $this->set('posts',$posts); in controller fie, then the variable $posts will be available to use in the view template file for that action.

Answer: Using $this->set(compact()) , we can pass multiple parameters to access into the view file. For example, $this->set(compact('posts','users','reports')); Now all these variables will be available in respective view file.

Answer: An advantage with first case $this->set('posts', $posts); is that it allows two different names for the view file and controller file. For example, you could write something like $this->set('postData', $posts);. Now the variable name in the view file would be $postData.   The advantage with the second approach $this->set(compact()); is easier to write, and useful especially when we are setting several variables to the view.No need to add separate line for each variable as we have with $this->set(); For example, $this->set(compact('posts','users','reports'));

Answer: 'email' => array(     'rule' => array(         'rule' => 'notEmpty',         'message' => 'Please Enter Email address.'     ),     'rule' => array(         'rule' => 'email',         'message' => 'Entered Email address is invalid.'     ) )   The problem is the first rule notEmpty will never be called because email rule will overwrite it.While using multiple validation rules for the same field you must keep the rule key "unique". In this case if we want to use multiple rules then, we can simple chang...

Answer: To get current url in cakephp use,    echo Router::url($this->here, true);   This will give full URL with hostname.If you want to get relative path instead of full URL,then use the following code: echo $this->here;   This will produce absolute URL excluding hostname i.e. /controller/abc/xyz/

Answer: There will be two vendor folders available in cakephp frame work. one in ” app ” folder and one in root folder   The vendor folder in the app folder is used to place the third-party libraries which are application specific. The vendor folder in the root folder is used to place the third-party libraries which are used for multiple applications.

Answer: default extension of view files is '.ctp'. yes we can change it by writing public $ext = '.yourext'; in AppController.If you want to change it for particular controller then add it into that controller only.You can also change it for the specific action of the controller by putting it in that action of controller.     public $ext = '.yourext'; in AppController  - you can change all the views extentions.    public $ext = '.yourext';  in specific controller like, PostsController - you can change all the views extentions of PostsController.   public $ext = '.yourext';  in specific controller action like, i...

Answer: To set a custom page title, copy-paste following code anywhere in your static page (.ctp) file: $this->set("title_for_layout", "My page title");

Answer: If you want to disply the schema of particular model then you just need to add the following single line of code.For example we have “Posts” Controller.pr($this->Post->schema());