php大转盘算法【PHP教程】

概述//获取中间记录的idfunctionget_rand(){$arr=['0'=>['id'=>1,'name'=>'test1','rand'=>0],'1'=>['id'=>2,'name'=>'test2','rand&#

// 获取中间记录的ID
function get_rand() {
    $arr = [
        \'0\'=>[\'ID\'=>1,\'name\'=>\'test1\',\'rand\'=>0],
        \'1\'=>[\'ID\'=>2,\'name\'=>\'test2\',\'rand\'=>1],
        \'2\'=>[\'ID\'=>3,\'name\'=>\'test3\',\'rand\'=>2],
        \'3\'=>[\'ID\'=>4,\'name\'=>\'test4\',\'rand\'=>1],
        \'4\'=>[\'ID\'=>5,\'name\'=>\'test5\',\'rand\'=>2],
        \'5\'=>[\'ID\'=>6,\'name\'=>\'test6\',\'rand\'=>6]
    ];
    $result = false;
    $all_rand = 0;
    foreach ($arr as $v) {
        $all_rand +=$v[\'rand\'];
    }
    foreach ($arr as $key=>$value) {
        if ($value[\'rand\']>0) {
            $pro = $value[\'rand\'];
            $randNum = mt_rand(1,$all_rand);
            if ($randNum<=$pro) {
                $result = $value[\'ID\'];
                break;
            } else {
                $all_rand -= $pro;
            }
        }
    }
    return $result;
}
echo get_rand();

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