Functions

Functions are defined with a set of parameters, a body of code for processing, and a returned value, typed or not.

Methods are defined almost the same way, except for some more options and within the context of a class.

A function is said to be anonymous when it has no name. This is the case of the closures and the arrow functions.

<?php

    function foo($a, $b) {
        return $a - $b;
    }

?>

Documentation

See Also

• PHP Functions
• How To Use Functions in PHP
• Functions

Related

• Recursion
• Closure
• Arrow Functions
• Method
• Anonymous Function
• First Class Callable
• Default Parameter
• Dereferencing
• Disable Functions
• Return
• Variable Arguments
• Callbacks
• Fallback Function
• Fallback To Global
• Pure Function
• Call Graph
• Impure Function
• Parameter Removal
• Undefined
• Dynamic Class Constant
• Naming Conflict
• PHP Native Function
• Relay Function
• Custom Function
• Identity