<?php $array1 = ['A', 'B', 'C', 'D']; $array2 = [ ['name' => 'B', 'number' => 10], ['name' => 'D', 'number' => 20] ]; $lookup = array_column($array2, 'number', 'name'); var_export(array_map(fn($v) => $lookup[$v] ?? '', $array1));
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