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<?php $arraySession = [ 'sampleA' => ['1', '2', '3'], 'sampleB' => ['1', '2', '3'], ]; $arrayPost = [ 'sampleA' => ['1'], 'sampleB' => ['1','2'], ]; $result = []; foreach ($arraySession as $k => $row) { $result[$k] = array_diff($row, $arrayPost[$k] ?? []); } var_export($result);
Output for git.master_jit, git.master
array ( 'sampleA' => array ( 1 => '2', 2 => '3', ), 'sampleB' => array ( 2 => '3', ), )

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