logicalOperators.php

<?php

// &&, ||, and, or, xor

$num1 = rand(0,9);
$num2 = rand(0,9);

if ( $num1 % 2 == 0 && $num2 % 2 == 0 ) echo "Both numbers are even.\n";
if ( $num1 % 2 == 0 and $num2 % 2 == 0 ) echo "Both numbers are even.\n";

if ( $num1 % 2 == 1 && $num2 % 2 == 1 ) echo "Both numbers are odd. \n";
if ( $num1 % 2 == 1 and $num2 % 2 == 1 ) echo "Both numbers are even.\n";

if ( $num1 % 2 == 0 || $num2 % 2 == 0 ) echo "At least one of the numbers is even.\n";
if ( $num1 % 2 == 0 or $num2 % 2 == 0 ) echo "At least one of the numbers is even.\n";

if ( $num1 % 2 == 1 || $num2 % 2 == 1 ) echo "At least one of the numbers is odd.\n";
if ( $num1 % 2 == 1 or $num2 % 2 == 1 ) echo "At least one of the numbers is odd.\n";

if ( $num1 % 2 == 0 xor $num2 % 2 == 0) echo "One number is even and one number is odd.\n";

echo '$num1 = ' . $num1 . "\n";
echo '$num2 = ' . $num2 . "\n";

/* The difference between '&&' and 'and' is that 'and' has a lower precedence than '&&'. This means that the '&&'
operation will be processed first.

For example, the command:
a && b and c,

will be processed:
(a && b) and c.

The same is true for '||' and 'or', where 'or' is a lower precedence operator. This is analogous to operator precedence
in 'BODMAS' where addition is completed before subtraction and multiplication before addition and so on and so on.