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<?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));
Output for git.master_jit, git.master
array ( 0 => '', 1 => 10, 2 => '', 3 => 20, )

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