只有管​​理员才能访问

Question

我想制作一个页面，我可以在此注册人们。但是，一般人只能注册管理员，而不能注册。我可以使用它并创建一个登录页面，但是现在我需要从注册页面阻止不是管理员的人。我目前有：

    import datetime as dt
    import matplotlib.pyplot as plt
    import pandas as pd

    while True:
        try:
            def plotgraph(year):
                dfgraph=pd.read_excel      
                (r'C:\Users\Taylo\Downloads\graph_data.xlsx')
                dfgraph=dfgraph.set_index(['Date'])
                start_date=datetime.date(year,8,1)
                end_date=datetime.date(year+1,2,1)
                print(dfgraph[start_date:end_date].plot())
                return

            year=int(input("Enter an election year: "))

        except ValueError:
            print("Sorry, I didn't understand that.")
            continue
        if (year>1915):
            df1=pd.read_excel
            (r'C:\Users\Taylo\OneDrive\Documents\election_facts_excel.xlsx')
            df2=df1.set_index('Year', drop = False)
            print(df2.loc[year])
            plotgraph(year)
            continue
        elif (year%2==1):
            print(year,"is not an election year")
            continue
        elif (year<1916):
            print("Data not available for elections before 1916.")
            continue

我目前也有一个类似http://prntscr.com/lnauru的数据库设置 问题是人们仍然可以访问该页面。不管是“ Y”还是“ N”

Answer 1

if(isset($_POST['isAdmin'])){
$userid     = $_POST['isAdmin'];

$query      = "SELECT * FROM staff_users WHERE userName = '$userid' AND isAdmin = 'Y'";
$result     = $dbc->query($query);
$row_cnt = $result->num_rows;
if ($row_cnt > 0){
    $_SESSION['isAdmin'] = $userid;
}
}

if(!isset($_SESSION['userSession'])){
    # redirect to the login page
    header('Location: https://mywebsite.com/staff');
    exit();
}

if ($_SESSION['isAdmin']=='N')
{
    header('Location: https://mywebsite.com/isnotstaff');
    exit();
}