array_multisort排序保留键名

$arr = array (
‘20181’ => array (
‘personNumIn’ => 53,
‘personNumNotIn’ => 8,
‘arriveLateNum’ => 8,
‘leaveEarlyNum’ => 26,
‘onlineTimeClassAvg’ => ‘1灏忔椂56鍒�’,
‘onlineRateClassAvg’ => ‘72.2’,
‘onlineRzdClassAvg’ => ‘64.8’,
‘classCount’ => 61,
‘class_id’ => ‘35’,
‘class_name’ => ‘2018绾�2鐝�’,
‘school_name’ => ‘姹熻嫃鐪佸皠闃充腑瀛�’,
‘lessonid’ => 6740,
‘cid’ => ‘5239’,
‘meeting_id’ => ‘bjNcYCHLIB’,
),

);

$keys=arra{y}_{k}eys($arr);
array_multisort(array_column($arr{,}^{\prime }onlineRateClassAv{g}^{\prime }),SOR{T}_{D}ESC,SOR{T}_{N}UMERIC,$arr,$keys);
echo “

”;

$array=arra{y}_{c}ombine($keys,$arr);prin{t}_r($array);die;