3v4l.org

run code in 300+ PHP versions simultaneously
<?php // PHP 7.1.0 to 7.2.0beta2 modulo bias bug found during work on http://www.openwall.com/php_mt_seed/ mt_srand(1234567890); $total = 100000; $max = 0x66666666; $halves[0] = $halves[1] = 0; for ($i = 0; $i < $total; $i++) { $halves[mt_rand(0, $max - 1) / ($max / 2)]++; } printf("%.1f%% vs. %.1f%%\n", 100. * $halves[0] / $total, 100. * $halves[1] / $total); ?>
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, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.26, 7.4.0 - 7.4.14, 8.0.0 - 8.0.1
50.0% vs. 50.0%
Output for 7.1.0 - 7.1.33
60.0% vs. 40.0%
preferences:
218.7 ms | 401 KiB | 361 Q