3v4l.org

run code in 300+ PHP versions simultaneously
<?php $balance = 100; for ($month = 1; $balance < 200; $month ++) { $balance *= 1 + 0.07 / 12; } echo "doubled in " . ($month - 1) . " months";
Output for 7.1.25 - 7.1.28, 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
doubled in 120 months
preferences:
161.3 ms | 403 KiB | 165 Q