3v4l.org

run code in 300+ PHP versions simultaneously
<?php printf("%.19f - %.19f", round(0.49999999999999994), 0.49999999999999994);
Output for 8.4.1 - 8.4.12
0.0000000000000000000 - 0.4999999999999999445
Output for 5.2.1 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25
1.0000000000000000000 - 0.4999999999999999445
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
1.0000000000000000000 - 0.4999999999999999112
preferences:
108.06 ms | 409 KiB | 5 Q