3v4l.org

run code in 300+ PHP versions simultaneously
<?php ini_set('precision', "16"); $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 );
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23.73 ms | 406 KiB | 5 Q