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<?php $array1 = [ [10, 'Some Name..'], [11, 'Some Name..'], [13, 'Some Name..'], ]; $array2 = [ [13, 'Viewed'] ]; $result = []; foreach (array_merge($array1, $array2) as $row) { if (!isset($result[$row[0]])) { $result[$row[0]] = $row; } else { $result[$row[0]][] = $row[1]; } } var_export($result);
Output for git.master_jit, git.master, rfc.property-hooks
array ( 10 => array ( 0 => 10, 1 => 'Some Name..', ), 11 => array ( 0 => 11, 1 => 'Some Name..', ), 13 => array ( 0 => 13, 1 => 'Some Name..', 2 => 'Viewed', ), )

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