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<?php $years = [7,8,9]; $students = [ 20=>7, 21=>11, 420=>8, 52=>12, 55=>9 ]; $students = array_filter($students, function($year) use ($years) { return in_array($year, $years); }); print_r($students);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [20] => 7 [420] => 8 [55] => 9 )

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