<?php
function check($num){
    $a = rand(999,10000);
//    $a = 1234;
    $q = (string)$a;
    $w = (string)$num;

    $sz = "0000";
    //比较
    if($q[0]==$w[0]){
        $sz[0]=1;
    }
    if($q[1]==$w[1]){
        $sz[1]=1;
    }
    if($q[2]==$w[2]){
        $sz[2]=1;
    }
    if($q[3]==$w[3]){
        $sz[3]=1;
    }

    echo "正确数字是{$a}，您输入的数字是{$num}"."<br>";
//    化为字符串

    echo $sz;

//      选择
    switch ($sz){
        case "0000":
            echo "辣鸡，一个没对！！！";
            break;
        case "0001":
            echo "好菜，仅仅猜对了个位";
            break;
        case "0010":
            echo "好菜，仅仅猜对了十位";
            break;
        case "0011":
            echo "好菜，仅仅猜对了个位和十位";
            break;
        case "0100":
            echo "好菜，仅仅猜对了百位";
            break;
        case "0101":
            echo "好菜，仅仅猜对了百位和个位";
            break;
        case "0110":
            echo "好菜，仅仅猜对了百位个十位";
            break;
        case "0111":
            echo "哎呀，居然猜对了 个、十、百位";
            break;
        case "1000":
            echo "好菜，仅仅猜对了千位";
            break;
        case "1001":
            echo "好菜，仅仅猜对了千位和个位";
            break;
        case "1010":
            echo "好菜，仅仅猜对了千位和十位";
            break;
        case "1011":
            echo "哎呀，居然猜对了 个、十、千位";
            break;
        case "1100":
            echo "好菜，仅仅猜对了千位和百位";
            break;
        case "1101":
            echo "哎呀，居然猜对了 个、百、千位";
            break;
        case "1110":
            echo "哎呀，居然猜对了 千、百、十位";
            break;
        case "1111":
            echo "666666都猜对啦";
            break;

    }

}

if($_POST){
//    if ($_POST["num"] < 999 || $_POST["num"] > 10000){
//        echo "请输入一个四位数字 =_=!!";
//    }else{
        check($_POST["num"]);
//    }


}