3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 1.1; $b = -1.1; $c = $a; $c += $a; var_dump($c); $c += $b; var_dump($c); $c += $b; var_dump($c); $c += $b; var_dump($c); $d = -0.00001893; $d += -1.89399999999988899; var_dump($d);
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(2.2) float(1.1) float(0) float(-1.1) float(-1.8940189299998889)
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 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
float(2.2) float(1.1) float(0) float(-1.1) float(-1.8940189299999)
preferences:
234.34 ms | 404 KiB | 358 Q