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run code in 300+ PHP versions simultaneously
<?php $idCounts = [ 3 => 15, 7 => 12, 8 => 10, 9 => 4 ]; $idNames = [ 1 => 'Steve', 2 => 'Georgia', 3 => 'Elon', 4 => 'Fiona', 5 => 'Tim', 6 => 'Petra', 7 => 'Quentin', 8 => 'Raymond', 9 => 'Barb' ]; $result = []; foreach ($idCounts as $id => $count) { if (isset($idNames[$id])) { $result[$idNames[$id]] = $count; } } var_export($result);
Output for 5.4.45, 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array ( 'Elon' => 15, 'Quentin' => 12, 'Raymond' => 10, 'Barb' => 4, )
preferences:
123.49 ms | 403 KiB | 122 Q