3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(0.2 + 0.1 - 0.1); $a = 0.1 + 0.2; $a -= 0.1; $b = 0.2; var_dump(array($a == $b, $a - 0.2, $b - 0.2));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
float(0.20000000000000004) array(3) { [0]=> bool(false) [1]=> float(2.7755575615628914E-17) [2]=> float(0) }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
float(0.2) array(3) { [0]=> bool(false) [1]=> float(2.7755575615629E-17) [2]=> float(0) }

preferences:
246.21 ms | 405 KiB | 326 Q