The default file extension for PHP files is ".php ". A PHP file normally contains HTML tags, and some PHP scripting code. Below, we have an example of a simple PHP file, with a PHP script …

PHP Comments Syntax for single-line comments Syntax for multi-line comments Using comments to leave out parts of the code Comments explained

PHP User Defined Functions Besides the built-in PHP functions, it is possible to create your own functions. A function is a block of statements that can be used repeatedly in a program. A …

The PHP switch Statement Use the switch statement to select one of many blocks of code to be executed. Syntax

Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.

The include (or require) statement takes all the text/code/markup that exists in the specified file and copies it into the file that uses the include statement. Including files is very useful when …

Example explained Line 1: #include <stdio.h> is a header file library that lets us work with input and output functions, such as printf() (used in line 4). Header files add functionality to C …

PHP String Functions The PHP string functions are part of the PHP core. No installation is required to use these functions.

In the example below we have put the HTML form and PHP code in the same PHP file. We have also added some extra lines for security.

Start a PHP Session A session is started with the session_start() function. Session variables are set with the PHP global variable: $_SESSION. Now, let's create a new page called …