3v4l.org

run code in 300+ PHP versions simultaneously
<?php $number = 5; $line = ''; for ($i = 1; $i <= $number; ++$i) { echo ( $line = str_repeat('*', $i) . $line . ($i > 1 ? '0' : '') ) . PHP_EOL; }
Output for 7.4.0 - 7.4.33, 8.0.1 - 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
* ***0 ******00 **********000 ***************0000

preferences:
84.27 ms | 406 KiB | 5 Q