3v4l.org

run code in 300+ PHP versions simultaneously
<?php $amounts = array(0.001, 0.005, 5.20, 5.195, 5.204, 5); foreach ($amounts as $amount) { echo $amount , "->" , (int)number_format($amount, 2, '', '')."\n"; }

preferences:
24.12 ms | 404 KiB | 5 Q