3v4l.org

run code in 300+ PHP versions simultaneously
<?php ini_set("precision", 30); var_dump(round(-1)); var_dump(+round(-1)); var_dump(round(-1e-99)); var_dump(+round(-1e-99)); var_dump(-round(-1e-99));
Output for 7.0.2 - 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, 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(-1) float(-1) float(-0) float(-0) float(0)
Output for 5.4.9 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.1
float(-1) float(-1) float(-0) float(0) float(0)
preferences:
192.17 ms | 402 KiB | 265 Q