3v4l.org

run code in 500+ PHP versions simultaneously
<?php $a = [[45, 16, 18, 72], [23, 8, 9, 36, 15, 36]]; $parts = []; foreach ($a as $subarray) { $parts[] = '[' . implode(' ', $subarray) . ']'; } echo '[' . implode(', ', $parts) . ']';
Output for 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 - 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.33, 8.4.1 - 8.4.24, 8.5.0 - 8.5.9
[[45 16 18 72], [23 8 9 36 15 36]]

preferences:
114.99 ms | 1519 KiB | 4 Q