PHP-dynamic server-side scripting

Example

<?php echo 'Hello, World!'; ?>

Scenario

This simple example shows how PHP can generate HTML dynamically. When a user accesses this script through a web server, PHP processes the code, and 'Hello, World!' is sent back as plain HTML. This can be extended to include logic that interacts with databases, fetches data, and displays personalized content.

Example

<?php $mysqli = new mysqli('localhost', 'username', 'password', 'database'); $result = $mysqli->query('SELECT * FROM users'); ?>

Scenario

PHP's ability to connect to various databases, including MySQL, PostgreSQL, and SQLite, allows developers to create data-driven applications. In this example, PHP is connecting to a MySQL database and querying the 'users' table. The results can then be processed to display user data on a website.

Example

<?php if ($_SERVER['REQUEST_METHOD'] == 'POST') { $name = $_POST['name']; } ?>

Scenario

PHP efficiently processes form data submitted via HTTP POST or GET requests. In this example, PHP checks if a form was submitted via the POST method and extracts the 'name' field value. This data could then be used for various purposes, like storing in a database or personalizing content.

Example

<?php session_start(); $_SESSION['username'] = 'admin'; ?>

Scenario

Session management is crucial for web applications that need to keep user data consistent across different pages. In this example, PHP starts a new session and stores the username 'admin' in the session data. This username can be retrieved and used throughout the user's session.

Example

<?php header('Content-Type: application/json'); echo json_encode(['status' => 'success']); ?>

Scenario

With the growth of single-page applications and mobile apps, PHP is increasingly used to build RESTful APIs. This example shows how to set the appropriate header and return JSON data, which can be consumed by clients written in any language.