3v4l.org

run code in 300+ PHP versions simultaneously
<?php error_reporting(E_ALL); ini_set('display_errors', 1); function calcmem($n) { return round(pow($n, 2) / (8 * 1024 * 1024), 2); } function println($str) { echo $str."\n"; } $n = 100000; println(calcmem($n).' Mo');; println($n * $n); println(8*1024*1024); println(($n*$n)/(8*1024*1024)); echo round(($n * $n) / (8*1024*1024), 2);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
1192.09 Mo 10000000000 8388608 1192.0928955078 1192.09
preferences:
174.88 ms | 406 KiB | 328 Q