A binary operator, such as =, is used to perform an operation on two operads. A unary operator, such as !, performs its operations on just one single value. PHP has plenty of different operators, the majority of them being either unary or binary operators. The switch statement essentially acts as an alternative the if…elseif…else statement when the condition for each statement is checking the same variable. This is where conditional statements in PHP are introduced. These conditions can be set via the script itself, or from user interaction – regardless your PHP script needs a way to handle these different situations. He majority of the time your PHP application or script will vary depending on different conditions. Understanding PHP ConstantsĪ constant within PHP is essentially an identifier for a simple value, and unlike a variable, the value of a constant cannot be changed after it is declared. By default a constant is case-sensitive and most people tend to give constant identifiers uppercase names. Properly understanding and using these different scopes can make or break your PHP application. PHP places variables into three different scopes: the global, local, and static scope. There’s much more to variables than just setting and using them. Variables – Understanding Global, Local, and Static Variable Scope So let’s take a look at creating variables and storing information in them through PHP.

A variable stores something inside of it so that you can recall it later on in your scripting. If you have ever looked through any programming language – or still remember those algebra classes when you learned what 3+x=5 means. How do we display things using PHP? Escaping Characters & Variable ExpansionĮscaping characters is rather basic, however understanding how it functions together with various variables is essential to an error-free PHP script.

It’s the starting point for learning almost any programming language. Looking to dive into the wonderful world of PHP & MySQL? The following tutorials should help you get started.Ĭhances are you’re familiar with the Hello World exercise by now.

Rapid php tutorial