PHP simple full version of WeChat carousel, including front-end and back-end data processing

I found that most of what I posted online was incomplete, so I made a contribution and shared it with everyone.

Complete code download: http://yun.baidu.com/s/1i3FXbPr

/**
 * $proArr = array('1'=>'Probability', '2'=>'Probability');
 * $proCount = array('1'=>'Inventory', '2'=> ;'Inventory');
*/
function getRand($proArr, $proCount) {
 $result = '';
 $proSum = 0;
 foreach ($proCount as $key => $val) {
 if ($val <= 0) {
 continue;
 } else {
 $proSum = $proSum + $proArr[$key];
 }
 }
 foreach ($proArr as $key => $proCur ) {
 if ($proCount[$key] <= 0) {
 continue;
 } else {
 $randNum = mt_rand(1, $proSum);
 if ($randNum <= $proCur) {
 $ result = $key;
 break;
 } else {
 $proSum -= $proCur;
 }
 }
 }
 unset($proArr);
 return $result;
}