<?php
//In PHP there are no
//Dictionary type, use array instead
$dic1 = [1 => "one"];
$strValue = $dic1[2];
//strValue is null
$dic2 = ["one" => 1];
$intValue = $dic2["two"];
//intValue is null
echo "strValue = ", is_null($strValue), "\n";
echo "intValue = ", is_null($intValue), "\n";