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<?php $array = [ 'user 1' => [ ['item 4' => '11385'], ['item 2' => '144268'], ['item 1' => '65774'], ['item 9' => '98523'], ], 'user 5' => [ ['item 8' => '239233'], ], 'user 2' => [ ['item 4' => '53718'], ['item 1' => '154687'], ], ]; ksort($array); foreach ($array as &$v) { array_multisort( array_map('key', $v), $v ); } var_export($array);
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array ( 'user 1' => array ( 0 => array ( 'item 1' => '65774', ), 1 => array ( 'item 2' => '144268', ), 2 => array ( 'item 4' => '11385', ), 3 => array ( 'item 9' => '98523', ), ), 'user 2' => array ( 0 => array ( 'item 1' => '154687', ), 1 => array ( 'item 4' => '53718', ), ), 'user 5' => array ( 0 => array ( 'item 8' => '239233', ), ), )
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64.72 ms | 1046 KiB | 4 Q