- Output for 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
- a 3 b 4 a 7 b 4 a 7 b 3
<?php
$a = 3; $b=4;
echo "\na ".$a; echo "\nb ".$b;
$a ^= $b;
echo "\na ".$a; echo "\nb ".$b;
$b ^= $a;
echo "\na ".$a; echo "\nb ".$b;