Category: 12. PHP

Using PHP with AJAX, we can parse an XML document from local directory as well as on a server. The following example demonstrates how to parse XML with web browser. The client-end script renders a HTML form and defines a JavaScript function for sending a HTTP request to the server with XMLHttpRequest object. On the…

AJAX is a shortform of the term Asynchronous JavaScript and XML. Ajax is used to build fast and dynamic web pages. Below example demonstrates interaction with the backend PHP script with AJAX functions to provide a search field on the webpage. Step 1 Save the following script as “example.php” − Open Compiler This code is…

PHP powered web applications often make use of AJAX, together they are useful to create dynamic and interactive web applications. AJAX stands for Asynchronous Javascript and XML. It allows webpages to be updated asynchronously without reloading the entire page. In AJAX applications, the exchange of data between a web browser and the server-side PHP script is…

Message flashing in a PHP web application refers to the technique that makes certain messages popup on the browser window for the user to receive application’s feedback. To be able to give the user a meaningful feedback to his interactions is an important design principle, that gives a better user experience. In a PHP web application,…

In PHP, PRG stands for “Post/Redirect/Get”. It is a commonly used technique that is designed to prevent the resubmission of a form after it’s been submitted. You can easily implement this technique in PHP to avoid duplicate form submissions. Usually a HTML form sends data to the server with the POST method. The server script…

The provision of sending emails is one the commonly required features of a typical PHP powered web application. You would like to send emails containing notifications, updates and other communications to your registered users, through your PHP application itself, instead of a different mail service. You can add this capability to your PHP application by…

From PHP version 7 onwards, the session_start() function accepts an array of options to override the session configuration directives set in “php.ini”. The [session] session in “php.ini” defines the default values of various options. The options, if provided, are in the form of an associative array of options that will override the currently set session configuration directives.…

PHP is a server-side scripting language that is used to create dynamic webpages. It is one of the most popular programming languages for web development. This chapter aims to let you get familiarized with certain important concepts of web application development using PHP. A web-based application is a collection of webpages. A webpage is mainly…

A web session is the time duration between the time a user establishes connection with a server and the time the connection is terminated. Along with the cookies, the session variables make the data accessible across the various pages of an entire website. During a session, the website maintains information about the user’s actions and…

The worldwide web is powered by HTTP protocol, which is a stateless protocol. The mechanism of Cookies helps the server maintain the information of previous requests. PHP transparently supports HTTP cookies. This chapter will teach you how to set cookies, how to access them and how to delete them. The Anatomy of a Cookie Cookies…