Random generation algorithm for WeChat red envelopes PHP version _php instance

Think about, write your own PHP version of the red envelope random generation algorithm, can achieve similar functions (in fact, dare not say is the algorithm).
//$bonus _totalTotal amount of red envelopes
//$bonus _countNumber of red envelopes
//$bonus _typeRed Envelope Type 1 = spell Lucky Red packet 0 = normal Red envelope

function Randbonus ($bonus _total=0, $bonus _count=3, $bonus _type=1) {  $bonus _items  = Array ();//results to be divided  $ Bonus_balance = $bonus _total; Balance after each split  $bonus _avg   = Number_format ($bonus _total/$bonus _count, 2);//The average amount of each red envelope  $i       = 0;  while ($i < $bonus _count) {    if ($i < $bonus _count-1) {      $rand      = $bonus _type? ( Rand (1, $bonus _balance*100-1)/100): $bonus _avg; Calculates the amount of the current red envelope based on the type of red envelope      $bonus _items[] = $rand;      $bonus _balance-= $rand;    } else{      $bonus _items[] = $bonus _balance;//The last red packet is contracted directly to the final amount, guaranteeing that the total amount issued is correct    }    $i + +;  }  return $bonus _items;}

Well, let's try it now.

Send 3 Lucky Red envelopes, the total amount is 100 yuan $bonus_items  = Randbonus (100, 3, 1);//View the generated red envelopes var_dump ($bonus _items);//Check the total amount is not correct, See if there's a hole in our money Var_dump (array_sum ($bonus _items));

Another version that uses an array implementation is similar in principle:

function Sendrandbonus ($total =0, $count =3, $type =1) {  if ($type ==1) {    $input     = range (0.01, $total, 0.01);    if ($count >1) {      $rand _keys = (array) array_rand ($input, $count-1);      $last    = 0;      foreach ($rand _keys as $i = + $key) {        $current  = $input [$key]-$last;        $items []  = $current;        $last    = $input [$key];      }    }    $items []    = $total-array_sum ($items);  } else{    $avg      = Number_format ($total/$count, 2);    $i       = 0;    while ($i < $count) {      $items []  = $i < $count-1? $avg:(-array_sum ($total));      $i + +;    }  }  return $items;}

The above is the whole content of this article, I hope that everyone's learning has helped, but also hope that we support the script home.

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