PHP Overview

What is PHP Widely available scripting language Free Alternative to Microsoft’s ASP Runs on the Web Server; not in the browser Example:

Variables and Data Types Can store text or numeric values in variables ilename=demo_var Can store Strings, integers, boolean, arrays objects and null

Operators. If..else..elseif Supports operators as in many other languages, as you would expect ilename=demo_oper_addition ilename=demo_oper_addition ilename=demo_oper_multiplication

Form Handling Handles HTML form submissions very well Great for interacting with a database Form submissions explained here:

Echo and Print echo and print both output data to the screen echo can be used without parentheses: echo or echo() Text can contain HTML markup Can display the contents of variables Tip: Use vardump($foo) when debugging and you want to know the content of a variable See w3Schools for more information