This is an introductory article on PHP programming. Some of main topics covered include: Variables, Strings, Arrays, Comparison Operators, and Control Structures.
This tutorial will teach you the basics of the PHP language -- looping, variables, forms, etc. It does not venture into functions, arrays, objects, or database/file manipulation.
This excellent five-page tutorial introduces you to the world of PHP3 programming and Web database interfacing with MySQL. Main topics include: The definition of PHP, How to use HTML forms and variables with PHP, MySQL database interfacing, Outputting data from MySQL, and more.
A function is a block of code which can be called from any point in a script after it has been declared. It is basically a compartmentalized PHP script designed to accomplish a single task. Functions are useful because they contribute to rapid, reliable, error-reducing coding, and increase legibility by tiding up complicated code sequences.
Array does not have to be a simple list of keys and values; each array element can contain another array as a value, which in turn can hold other arrays as well. This way, you can create a multi-dimensional array. In this article principles of using multidimensional arrays are explained and source code defining multidimensional array and displaying the array values on the web page is given.
Testing your PHP Enviroment with phpinfo(). This will show you lots of useful data including a large amount of information about the current state of PHP. This includes information about PHP compilation options and extensions, the PHP version, server information and environment (if compiled as a module), the PHP environment, OS version information, paths, master and local values of configuration options, HTTP headers, and the PHP License.
This is a very simple tutorial that outlines the four main mathematical functions and how to use them. Clearly written with the ability to ask questions afterwards.