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run code in 150+ php & hhvm versions
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<?php $arr = array( '1.0' => '1.0', '20.0' => '20.0', '5.0' => '5.0', ); krsort($arr); var_dump($arr); krsort($arr, SORT_NUMERIC); var_dump($arr);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(3) { ["20.0"]=> string(4) "20.0" ["5.0"]=> string(3) "5.0" ["1.0"]=> string(3) "1.0" } array(3) { ["20.0"]=> string(4) "20.0" ["5.0"]=> string(3) "5.0" ["1.0"]=> string(3) "1.0" }