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<?php $array = [ ['123', 'aaa'], ['124', 'bbb'], ['124', 'ccc'], ['125', 'ddd'], ['124', 'eee'], ['123', 'fff'], ]; var_export( array_reverse(array_column(array_reverse($array), null, 0)) ); $result = []; foreach ($array as $row) { if (!isset($result[$row[0]])) { $result[$row[0]] = $row; } } var_export(array_values($result));
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
array ( 0 => array ( 0 => '125', 1 => 'ddd', ), 1 => array ( 0 => '124', 1 => 'bbb', ), 2 => array ( 0 => '123', 1 => 'aaa', ), )array ( 0 => array ( 0 => '123', 1 => 'aaa', ), 1 => array ( 0 => '124', 1 => 'bbb', ), 2 => array ( 0 => '125', 1 => 'ddd', ), )
preferences:
189.57 ms | 408 KiB | 5 Q