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<?php $array = [ ["name" => "a", "gender" => "male"], ["name" => "b", "gender" => "female"], ["name" => "c", "gender" => "female"], ["name" => "d", "gender" => "female"], ["name" => "e", "gender" => "male"], ["name" => "f", "gender" => "male"], ["name" => "g", "gender" => "male"], ]; $nths = []; $genders = []; foreach ($array as ['gender' => $v]) { $genders[] = $v; $nths[] = $counters[$v] = ($counters[$v] ?? 0) + 1; } array_multisort( $nths, /* prioritize by order of encounter per unique gender */ $genders, /* sort by gender per encounter group */ SORT_DESC, /* sort "male" before "female" per encounter group */ $array /* break any remaining ties and modify the original array */ ); var_export($array);
Output for git.master_jit, git.master
array ( 0 => array ( 'name' => 'a', 'gender' => 'male', ), 1 => array ( 'name' => 'b', 'gender' => 'female', ), 2 => array ( 'name' => 'e', 'gender' => 'male', ), 3 => array ( 'name' => 'c', 'gender' => 'female', ), 4 => array ( 'name' => 'f', 'gender' => 'male', ), 5 => array ( 'name' => 'd', 'gender' => 'female', ), 6 => array ( 'name' => 'g', 'gender' => 'male', ), )

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