3v4l.org

run code in 300+ PHP versions simultaneously
<?php $measures = array('byte', 'kilob', 'megab', 'gigab', 'terab'); $index = floor(log(3435973836.8, 1024)); echo $index; $size = number_format(3435973836 / pow(1024, $index),1); echo pow(1024, $index); #echo $size; ?>
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
31073741824

preferences:
248.07 ms | 403 KiB | 287 Q