PHP Random Draw Example Analysis

<?PHPHeader(' Content-type:text/html;charset=utf-8 ');/** * Lottery Tools*/classLottery_tool {protected Static $AWARDSARR; protected Static $proField= ' probability '; protected Static $proSum= 0; protected Static $checkAward=false; ConstSuccess_code = 0; ConstFail_code =-1; //Check Lottery Data    protected Static functioncheckawards () {if(!Is_array(Self::$AWARDSARR) ||Empty(Self::$AWARDSARR)) {            returnSelf::$checkAward=false; } Self::$proSum= 0; foreach(Self::$AWARDSARR  as $_key=$award) { self::$proSum+=$award[Self::$proField]; }        if(Empty(Self::$proSum)) {            returnSelf::$checkAward=false; }        returnSelf::$checkAward=true; }    protected Static functionSuccessroll ($rollKey){        return Array(' Code ' = Self::success_code, ' roll_key ' =$rollKey, ' msg ' = ' roll success '); }    protected Static functionFailroll ($msg= ' Roll fail '){        return Array(' Code ' = Self::fail_code, ' msg ' =$msg ); }    //Lottery     Public Static functionRoll () {if(false= = Self::$checkAward) {            returnSelf::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<=$proValue) {                returnSelf::successroll ($_key); }        }        returnSelf::failroll (' wrong '); }     //Change the probability field name     Public Static functionSetprofield ($field=NULL) {        if(!Empty($field) ) { self::$proField=$field; }    }    //Set up Prizes     Public Static functionSetawards ($awards) { self::$AWARDSARR=$awards; Self::checkawards (); }}$awards=Array(        ' 0 ' + =Array(' Pro ' = 1, ' info ' = ' 1% possibilities ', ' num ' =>0), ' 1 ' =Array(' pro ' = +, ' info ' = ' 25% possibilities ', ' num ' =>0), ' 2 ' =Array(' pro ' = +, ' info ' = ' 40% possibilities ', ' num ' =>0), ' 3 ' =Array(' pro ' = +, ' info ' = ' 34% possibilities ', ' num ' =>0),    ); //Change the probability field nameLottery_tool::setprofield (' Pro ');//Set up PrizesLottery_tool::setawards ($awards);$result=Array(); for($i= 100;$i--;) {     //Lottery    $result[] = Lottery_tool::Roll ();}foreach($result  as $key=$value) {    $awards[$value[' Roll_key '] [' num '] + +;}Echo' <pre> ';Var_dump($awards);

PHP Random Draw Example Analysis