3v4l.org

run code in 300+ PHP versions simultaneously
<?php for ($i = 0; $i < 10; $i++) { var_dump(log10($i % 10 + 1) * 20 + 1); }
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(1) float(7.020599913279624) float(10.542425094393248) float(13.041199826559248) float(14.979400086720377) float(16.563025007672874) float(17.901960800285135) float(19.06179973983887) float(20.084850188786497) float(21)
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, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
float(1) float(7.0205999132796) float(10.542425094393) float(13.041199826559) float(14.97940008672) float(16.563025007673) float(17.901960800285) float(19.061799739839) float(20.084850188786) float(21)
preferences:
300.83 ms | 405 KiB | 460 Q