Creating and calling own functions

PHP has a lot of built-in functions for every needs. More capabilty for you to define and use your own functions for whatever wpecific purpose. The syntax is making own function is:
function function_name() {
// Funtion code.
}

The name of your own fuction can be any combination of letters, numbers and the underscore.

To create own functions

dateform.phps | dateform.php

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Creating function that takes argument

A function can take any number of arguments that you choose, but the order in which you put them is critixal. For your arguments, use variable names:

function function_name ($arg1, $arg2) {
// Function code.
}

To call function use
function_name ('value', 'more values');
function_name ('valu', '$var');

To write function that takes argument

calculator.phps | calculator.php | handle_calculator.phps | handle_calculator.php