3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1; var_dump( ini_get('precision'), $x, (string)$x );

preferences:
25.12 ms | 405 KiB | 5 Q