3v4l.org

run code in 300+ PHP versions simultaneously
<?php for ($i = 0; $i < 10; $i++) { var_dump(log10($i % 100 + 1) * 20); }
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(0) float(6.020599913279624) float(9.542425094393248) float(12.041199826559248) float(13.979400086720377) float(15.563025007672874) float(16.901960800285135) float(18.06179973983887) float(19.084850188786497) float(20)
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 - 5.5.37, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7, 7.2.29 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
float(0) float(6.0205999132796) float(9.5424250943932) float(12.041199826559) float(13.97940008672) float(15.563025007673) float(16.901960800285) float(18.061799739839) float(19.084850188786) float(20)

preferences:
283.65 ms | 405 KiB | 347 Q