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<?php function hasort($arr) { $a = $b = array(); foreach($arr as $v => $k) $a[$k][] = $v; ksort($a); foreach($a as $v => $i) foreach($i as $k) $b[$k] = $v; return $b; } $a = array('a' => 10, 'z' => 10, 'c' => 10, 'b' => 11, 'd' => 10); $a = hasort($a); print_r($a);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.32, 8.0.0 - 8.0.24, 8.1.0 - 8.1.11
Array ( [a] => 10 [z] => 10 [c] => 10 [d] => 10 [b] => 11 )

preferences:
74.48 ms | 412 KiB | 5 Q