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:
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.
echo "Hello world!";
printMsg(); // call printMsg function
The above code simply prints the string “Hello World!” by calling its function name called
. This function does not return any value.
Now let’s create a function that return a value with arguments.
function calculate($number1, $number2)
return $number1 + $number2;
calculate(1, 1); // call calculate function
The code above simply pass the parameter to calculate function using an argument
, then it returns a value by adding the two variables.