3v4l.org

run code in 300+ PHP versions simultaneously
<?php $dist = sin(deg2rad(45.9007)) * sin(deg2rad(45.9007)) + cos(deg2rad(45.9007)) * cos(deg2rad(45.9007)); var_dump( $dist, acos($dist) );
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
float(1.0000000000000002) float(NAN)
Output for 7.2.29 - 7.2.33, 7.3.16 - 7.3.33, 7.4.4 - 7.4.33
float(1) float(NAN)
Output for 7.1.25 - 7.1.33, 7.2.0 - 7.2.25, 7.3.0 - 7.3.12, 7.4.0
float(1) float(0)
preferences:
179.3 ms | 408 KiB | 5 Q