<?php $a1 = [ ['name' => 'mike', 'age' => 18], ['name' => 'james', 'age' => 22], ['name' => 'sarah', 'age' => 35], ['name' => 'ken', 'age' => 29], ]; $a2 = [22, 25, 35, 40]; var_export( array_uintersect( $a1, $a2, fn($a, $b) => ($a['age'] ?? $a) <=> ($b['age'] ?? $b) ) );
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