通过Ajax随机生成菜品与点菜

HTML部分：

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title></title>
    <script src="../../jQuery/jquery-3.4.1.min.js"></script>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        
        section {
            width: 230px;
            margin: 50px auto;
            text-align: center;
            overflow: hidden;
        }
        
        section>* {
            float: left;
        }
        
        section input {
            width: 150px;
            height: 30px;
            padding: 0 10px;
            border: 1px solid #ccc;
            outline: none;
            box-sizing: border-box;
            font-size: 16px;
        }
        
        section input:focus {
            border-color: orange;
        }
        
        section button {
            width: 80px;
            height: 30px;
            outline: none;
        }
        
        section div {
            width: 100%;
            height: 30px;
            text-align: center;
            line-height: 30px;
            font-size: 13px;
            border-radius: 10px;
            border-bottom: 1px solid #333;
            box-sizing: border-box;
            cursor: pointer;
            /* cursor: not-allowed; */
        }
    </style>
</head>

<body>
    <section>
        <input type="number" name="number" placeholder="你要吃几道菜？">
        <button type="button">开始点菜</button>
    </section>
    <script>
        $(function() {
            $('section button').on('click', function() {
                $('section>div').remove();
                $.get('end.php', {
                    num: $('input').val(),
                }, function(e) {
                    var re = e;
                    if (re.code == 1001) {
                        alert(re.message);
                    } else {
                        for (var i = 0; i < re.length; i++) {
                            $('section').append('<div>' + re[i] + '</div>');
                        };
                    }
                }, 'json');
            });
            $('section').on('click', "div", function() {
                var _this = $(this);
                $.post('end.php', {
                    click: $(this).text(),
                }, function(e) {
                    if (e.code == 200) {
                        _this.css({
                            "color": "gray",
                            "cursor": 'not-allowed'
                        });
                    }
                }, 'json');
            });
        });
    </script>
</body>

</html>

PHP部分：

<?php
if($_GET){
    $num = ((int)$_GET['num']);
    $min_cai = 1;
    $max_cai = 72;
    if($num < $min_cai || $num > $max_cai){
        $re = [
            'code'=>1001,
            'message'=>'数值不在指定范围1~72'
        ];
        echo json_encode($re);
        die();
    }else{
        $cai_arr = explode('&',file_get_contents('end.txt'));
        $arr = [];
        for($i = 0;$i < $num;$i++){
            $cai_num = mt_rand($min_cai-1, $max_cai-1);
            while(in_array($cai_num,$arr)){
                $cai_num = mt_rand($min_cai-1, $max_cai-1);
            }
            array_push($arr,$cai_num);
        };
        $re = [];
        foreach($arr as $k => $v){
            array_push($re, $cai_arr[$v]);
        }
        echo json_encode($re);
    }
}
elseif($_POST){
    $cai_name = $_POST['click'];
    $cai_arr = explode('&',file_get_contents('end.txt'));
    if(in_array($cai_name,$cai_arr)){
        $File = fopen('./data.txt','a+');//这里是你曾品尝过的食物
        fwrite($File,$cai_name.'&');
        fclose($File);
        $re = [
            'code' => 200,
            'message' => '品尝成功'
        ];
        echo json_encode($re);
    }

}
?>

运行效果：

运行效果

储存的数据：

  汽锅鸡&酸辣藕丁&蛋饺&家庭版剁椒鱼头&小笼汤包&