PHP Functions

Functions play an important role in any programming languages. It allows you to organize your code in smaller part. A function can be called repeatedly in your program and can return or not return any value. There are more than 1,000 built-in functions in PHP and you can also create your own function. Here’s the syntax of a user defined function: function functionName() { your code or statement here; } When you name a function, make sure that it reflects the code that you write so you will know its purpose. Let’s create a sample that will print the Hello World! string. The above code simply prints the string “Hello World!” by calling its function name called printMsg. This function does not return any value. Now let’s create a function that return a value with arguments. The code above simply pass the parameter to calculate function using an argument $number1 and number2, then it returns a value by adding the two variables.