3v4l.org

run code in 300+ PHP versions simultaneously
<?php $number = 5; for ($i = 1; $i <= $number; $i++) { echo str_repeat('*', $i * ($i + 1) /2) . str_repeat('0', $i) . PHP_EOL; }

preferences:
38.37 ms | 458 KiB | 5 Q