<?php $array = [ 'a' => ['page' => 'page1', 'name' => 'pagename1'], 'b' => ['page' => 'page2', 'name' => 'pagename2'], 'c' => ['page' => 'page3', 'name' => 'pagename3'], 'd' => ['page' => 'page4',], ]; var_export(array_reduce($array, fn($result, $row) => array_merge($result, [$row['name'] ?? 'missing']), []));
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