The big turntable is one of the most interesting items in many online activities recently. Let's take a look at the algorithm and example of the winning probability of the big turntable. I hope it will help you. The big turntable is one of the most interesting items in many online activities recently. Let's take a look at the algorithm and example of the winning probability of the big turntable. I hope it will help you.
Script ec (2); script
Recently, I have a project in my work. The APP client has a big turntable lottery. Of course, we have implemented the lottery on our server. The implementation code is as follows:
| The Code is as follows: |
|
Header ("Content-type: text/html; charset = UTF-8 ");
$ Prize_arr = array (
'0' => array ('id' => 1, 'prize' => 'tablet pc', 'V' => 1 ),
'1' => array ('id' => 2, 'prize' => 'digital camera ', 'V' => 5 ),
'2' => array ('id' => 3, 'prize' => 'speaker device', 'V' => 10 ),
'3' => array ('id' => 4, 'prize' => '4g disks', 'V' => 12 ),
'4' => array ('id' => 5, 'prize' => '10q coin ', 'V' => 22 ),
'5' => array ('id' => 6, 'prize' => 'Next time you may be able to get in, ', 'V' => 50 ),
);
$ Actor = 100;
Foreach ($ prize_arr as $ v ){
$ Arr [$ v ['id'] = $ v ['V'];
}
Foreach ($ arr as & $ v ){
$ V = $ v * $ actor;
}
Asort ($ arr );
$ Sum = array_sum ($ arr); // The total probability.
$ Rand = mt_rand (1, $ sum );
$ Result = ''; // The winning product id
Foreach ($ arr as $ k => $ x)
{
If ($ rand <= $ x)
{
$ Result = $ k;
Break;
}
Else
{
$ Rand-= $ x;
}
}
$ Res ['yes'] = $ prize_arr [$ result-1] ['prize']; // medium Award
Print_r ($ res ); |
