回形打印，抽奖demo，千分位取值

1.链式函数

function createModel(n){
    $ = {
        name : n,
        get : function(){
        return $.name;
        },
        set : function(val){
        $.name = val;
        console.log($.name);
        return $;
        }
    }
    return $;
 }
$=createModel();
$.set('aaa').set('bbb').set('ccc');

2. 回形打印，先打印出坐标，然后取自己需要的条件为星号，不符合条件的为空格

for ($y=1; $y <=10 ; $y++) { 
$str = '';
for ($x=1; $x <=10 ; $x++) { 
    $s = ' ';
    if($x==1 || $x==10 || $y==1 || $y==10)
        $s = "*";
    if($x>=3 && $x<=8 && ($y==3 || $y==8))
        $s = "*";
    if($y>=3 && $y<=8 && ($x==3 || $x==8))
      $s = "*";

      $str = $str.$s;
}
echo $str.'
';
} 

3.千分位取值，先把数字转成字符串，取值从后往前取，输出值，从前往后输出；取符合条件的位置加逗号

function format(num){
var num = num+'';   
var str = '';       
var len = num.length;
for(var i=len-1; i>=0; i-- ){
    str = num[i]+str;   
    if ((len-i)%3==0 && i!=0 ) {
    str = ","+str;   
    }
}
console.log(str);
}
format(1234567890);

4.抽奖功能代码展示Top

connect("localhost",6379);

 $db = new mysqli("localhost","root","123456","jiang");


function createCode(){
    return md5(uniqid(microtime(true),true));
}

$one = 10;      // 一等奖个数
$two = 30;      // 二等奖个数
$three = 50;    // 三等奖个数
$no = 1000;     // 谢谢参与个数
$award = [];

$award = array_merge($award,getArray($one,"一等奖"));
$award = array_merge($award,getArray($two,"二等奖"));
$award = array_merge($award,getArray($three,"三等奖"));
$award = array_merge($award,getArray($no,"感谢参与"));

shuffle($award);// 打乱中奖顺序

for($i=0;$ilpush("list",$awardCode);
    $sql = "insert into award(award,code) value('".$award[$i]."','".$awardCode."')";
    $db->query($sql);
}


function getArray($number,$value){
    $arr = [];
    for($i=0;$i<$number;$i++){
        $arr[] = $value;
    }
    return $arr;
}
?>


0){
  //  exit("未到抽奖时间");
//}

// 连接redis
$redis = new Redis();
$redis->connect("localhost",6379);

// 生成cookie
function createCode(){
    return md5(uniqid(microtime(true),true));
}
$cookie = createCode();
if(empty($_COOKIE['codeid'])){
    setcookie("codeid",$cookie,time()+24*60*60*60);
}else{
    exit("你已经抽过了!");
}

$code = $redis->lpop("list");

if($code){
    exit("你抽取的抽奖码为:".$code);
}else{
    exit("兑换码已抽完");
}
?>


query($sql);

$row = $res->fetch_assoc();

if($row == NULL){
    exit("兑奖码无效");
}
if($row['status'] == 0){
    $s = "update award set status=1 where code='".$awradCode."'";
    $r = $db->query($s);// 更新兑奖状态
    exit($row['award']);
}elseif($row['status'] == 1){
    exit("该兑奖码已经使用");
}else{
    exit("兑奖码无效");
}
?>