Php random lottery instance analysis

This article mainly introduces the php random lottery implementation method. The example analyzes the php lottery lottery_tool and Its Usage skills. For more information, see

This article mainly introduces the php random lottery implementation method. The example analyzes the php lottery lottery_tool and Its Usage skills. For more information, see

This example describes the usage of php random lottery. Share it with you for your reference. The specific analysis is as follows:

1. Get the random lottery result based on the set probability.

The Code is as follows:

<? Php
/**
* Lottery Tool
*/
Class lottery_tool {
Protected static $ awardsArr;
Protected static $ proField = 'bability ';
Protected static $ proSum = 0;
Protected static $ checkAward = false;
Const SUCCESS_CODE = 0;
Const FAIL_CODE =-1;
// Check the lottery data
Protected static function checkAwards (){
If (! Is_array (self ::$ awardsArr) | empty (self ::$ awardsArr )){
Return self: $ checkAward = false;
}
Self: $ proSum = 0;
Foreach (self ::$ awardsArr as $ _ key => $ award ){
Self: $ proSum + = $ award [self: $ proField];
}
If (empty (self: $ proSum )){
Return self: $ checkAward = false;
}
Return self: $ checkAward = true;
}
Protected static function successRoll ($ rollKey ){
Return array ('code' => self: SUCCESS_CODE, 'roll _ key' => $ rollKey, 'msg '=> 'roll success ');
}
Protected static function failRoll ($ msg = 'roll fail '){
Return array ('code' => self: FAIL_CODE, 'msg '=> $ msg );
}
// Lottery
Public static function roll (){
If (false = self: $ checkAward ){
Return self: failRoll ('awards data is not the right format! ');
}
$ Result = mt_rand (0, self: $ proSum );
$ ProValue = 0;
Foreach (self ::$ awardsArr as $ _ key => $ value ){
$ ProValue + = $ value [self: $ proField];
If ($ result <= $ proValue ){
Return self: successRoll ($ _ key );
}
}
Return self: failRoll ('wrong ');
}
// Change the probability field name
Public static function setProField ($ field = null ){
If (! Empty ($ field )){
Self: $ proField = $ field;
}
}
// Set Prize
Public static function setAwards ($ awards ){
Self: $ awardsArr = $ awards;
Self: checkAwards ();
}
}

2. Sample Code:

The Code is as follows:

$ Awards = array (
'0' => array ('pro' => 15, 'info' => '15% likelihood '),
'1' => array ('pro' => 25, 'info' => '25% likelihood '),
'2' => array ('pro' => 40, 'info' => '40% likelihood '),
'3' => array ('pro' => 20, 'info' => '20% likelihood '),
);
Lottery_tool: setProField ('pro ');
Lottery_tool: setAwards ($ awards );
$ Result = array ();
For ($ I = 10000; $ I --;){
$ Result [] = lottery_tool: roll ();
}
Foreach ($ result as $ key => $ value ){
$ Awards [$ value ['roll _ key'] ['num'] ++;
}
Echo'

';
Var_dump ($ awards );
The running result is as follows:
The Code is as follows:
Array
0 =>
Array
'Pro' => int 15
'Info' => string 'likelihood of 15% '(length = 15)
'Num' => int 1596
1 =>
Array
'Pro' => int 25
'Info' => string 'likelihood of 25% '(length = 15)
'Num' => int 2484
2 =>
Array
'Pro' => int 40
'Info' => string 'likelihood of 40% '(length = 15)
'Num' => int 3939
3 =>
Array
'Pro' => int 20
'Info' => string 'likelihood of 20% '(length = 15)
'Num' => int 1981
I hope this article will help you with php programming.
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