add two variables in php code example

Example 1: add more data to variable php

$a = "Hello ";
$a .= "World!";

Example 2: addition in php

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

Example 3: assign multiple variables php

[$var1, $var2, $var3, $var4, $var5] = array(1, 2, 3, 4, 5);