AJAX TUTORIAL WITH EXAMPLES IN PHP PDF
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See Setting View Variables for more information on using set. Combining this with view blocks gives you a powerful way to keep your views DRY.
For example, your application has a sidebar that needs to change depending on the specific view being rendered.
It expects that the view extending it will define the sidebar and title blocks. The content block is a special block that CakePHP creates.
It will contain all the uncaptured content from the extending view. Any content not already in a defined block will be captured and put into a special block named content.
When a view contains a call to extend , execution continues to the bottom of the current view file. Once it is complete, the extended view will be rendered.
You can nest extended views as many times as necessary. Each view can extend another view if desired. Note You should avoid using content as a block name in your application.
CakePHP uses this for uncaptured content in extended views. Blocks can be defined in two ways: either as a capturing block, or by direct assignment. The reset method will clear or overwrite a block at any time. The assign method with an empty content string can also be used to clear the specified block.
This allows you to add placeholder content when a block does not exist. Anything you want to see in all of your views should be placed in a layout. If you want to change the overall look of your application, then this is the right place to start, because controller-rendered view code is placed inside of the default layout when the page is rendered. When you create a layout, you need to tell CakePHP where to place the output of your views.
See API for more details on usage. The content block contains the contents of the rendered view. Most AJAX calls only require a bit of markup in return, rather than a fully-rendered interface. The skeleton app also has a default layout to help generate RSS. CakePHP can help you repeat parts of your website that need to be reused.
These reusable parts are called Elements. Ads, help boxes, navigational controls, extra menus, login forms, and callouts are often implemented in CakePHP as elements. An element is basically a mini-view that can be included in other views, in layouts, and even within other elements. Elements can be used to make a view more readable, placing the rendering of repeating elements in its own file. Click OK to save changes and exit the Project Properties window.
Run the project to see what it looks like in a browser. Click the Run Project button.
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Asynchronous interaction implies that the browser can continue to process events in the page after the request is sent. Data is passed in the background, and can be automatically loaded into the page without requiring a page refresh. In the above example, the parameters are: The URL autocomplete. The callback function for this interaction is set with the statement: req.
This action maps to the HTTP request that is sent to the web server in the above flow diagram. The PHP editor provides standard editing features such as code completion, syntax highlighting, mark occurrences, refactoring, code templates, documentation pop-up, code navigation, editor warnings and, for NetBeans 6.
The business logic for the auto-complete application that you are building needs to process requests by retrieving data from the data store, then prepare and send the response. This is implemented here using a PHP file named autocomplete. Before you begin coding the file, set up the data store and the functionality required by the file to access data. Creating the Business Logic Creating the Data Store For this simple application, you create a class called Composer that enables the business logic to retrieve data from entries contained in a composers array.
A sample of the file is included in the sample application.