One of the most frequently used code in PHP or any programming language is the code that will increment or decrement the value of a variable. This code or expression is used in programs as simple as a page counter or as complicated as credit card processing.

There are two string operators for joining character strings in PHP; the concatenating assignment operator and the concatenation operator.

We will use the fread( ), filesize( ) and file_get_contents( ) functions to read the contents of a file into a string.

This book by Shu-Wai Chow will show you how to install, setup and use PHPEclipse which is a popular open source IDE (integrated development environment) for PHP programmers.

In this tutorial, we will take a look at how to pass the value of a variable from an HTML web form to a PHP program.

An associative array uses index keys but these keys are not numeric as in the regular array. The keys in an associative array are usually character strings.

In this tutorial, you will learn how to use a default value for an argument variable in a PHP function. This default value is used by the function only if there is no value for the argument variable passed to the function in the function call.

The fopen( ) and fclose( ) PHP filesystem functions and their modes are used together to open, and then close, an existing file that is part of your website or to generate a new file.

One way to make an outside variable available to a function is to use the PHP global statement. The global statement brings the outside variable into the function code so you can use the variable.

Articles, tutorials and applications in PHP - check this complete list categorized by subject.