<?php $array = [ 'a' => 0, 'b' => 0, 'c' => 0, 'd' => 1, 'e' => 1, 'f' => 1 ]; array_multisort( array_map( function ($v) { static $counters = [0, 0]; return $counters[$v]++; }, $array ), $array, SORT_DESC ); var_export($array);
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