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run code in 300+ PHP versions simultaneously
<?php $myExistingArray = []; for ($i = 0; $i < 100; $i++) { $myExistingArray[] = ['key1' => '1234', 'key2' => '56', 'count' => 1]; } $myNewArray = []; foreach ($myExistingArray as $item) { $myNewArray[$item['key1'] . '_' . $item['key2']] = $item['count']; }

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
42.3 ms | 1922 KiB | 4 Q