php function variables code example

Example 1: php functions parameters

// functions require 'function' keyword
// separate the parameters with a comma
function addFunction($num1, $num2) {
	$sum = $num1 + $num2;
	echo "Sum of the two numbers is : $sum";
}

addFunction(1, 2); // echoes: Sum of the two numbers is : 3

Example 2: variable args php

function some_function(...$args): void {
  $val1 = $args[0];
  // Access as normal index array
}

Example 3: php is variable a function

is_callable($var) // returns true if variable is a function