function to add two numbers php code example

Example 1: add two numbers in php

<?php  
$x=15;  
$y=30;  
$z=$x+$y;  
echo "Sum: ",$z;  
?>

Example 2: sum two numbers in php

<?php  
$x=10;  
$y=20;  
$z = $x + $y;  
echo "Sum of x and y : ". $z;  
?>