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<?php $a = [ 'a' => [ 'b' => ['c', 'd'] ] ]; array_walk_recursive($a, function() use (& $totalTakeaways) { $totalTakeaways++; });
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 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 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7

preferences:
181.58 ms | 404 KiB | 275 Q