lottery prediction algorithm

', ' Weight ' =>80)Weights are ranked in turn, and the weights are guaranteed to be integer);function Lotterydraw ($arr) {$weightSum = 0;foreach ($arr as $rows) {$weightSum + = $rows [' Weight '];//total weight added}$randomNumber = rand (1, $weightSum);//Get random numbersforeach ($arr as $rows) {if ($randomNumber return $rows [' Prize '];}else{$randomNumber-= $rows [' Weight '];}}}The more experiments you get, the closer the weight$first = $second = $third = 0;//number of times 0for ($i = 0;

Not much to say, the code is not many, the algorithm is simpleMethod One:/** * Algorithm for winning numbers, the method will fill the last number to this position after each draw to a winning number, implementing the non-repeating extraction. * Method Two:/** * Gets the algorithm of the winning number, method sets the value of the original array to be Boolean, t

We finish the process of PHP backstage, PHP's main work is responsible for the allocation of prizes and the corresponding probability of winning, the current page click to flip a box will want the background PHP to send Ajax request, then the backstage PHP according to the probability of configuration, through the probability algorithm to give the winning results, The award information is also sent to the front-end page in JSON data format. First loo