Functions | Php Programming

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Functions

A function in programming is a task you the program to perform. It tells the computer what to do and how to do it when it runs a certain program. It's kind of like telling a robot what to do. For example, if you want the robot to make something for you, you would give it instructions or write down a recipe on how to make that thing. That's what functions are like: instructions for the computer on how to make something happen.
- - Defined ^Functions
  - Php
    Example of function in php.
```
<?php
function addition($a, $b) {
	return $a + $b;
}

print(addition(1, 2)); // 3
```
- - Anonymous ^Functions
  - Php
    Example of anonymous function in php.
```
<?php
call_user_func(function ($a, $b) {
	print($a + $b); // 3
}, 1, 2);
```
- - Variable ^Functions
  - Php
    Example of variable function in php.
```
<?php
$addition = function ($a, $b) {
	return $a + $b;
};

print($addition(1, 2)); // 3
```
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