都是很简单的东西，新手用得着、、、
省略部分前端代码、、、
首先是登录的校验：

session_start();

$user = $_POST['userName'];
$pass = $_POST['passWord'];
$_SESSION['user'] = $user;
/*$Enter = $_POST['Login_undo'];
管理员登录的校验*/
$flag = false;
if($user == "Admin"&& $pass == "root")
{
setcookie("userName",$user,time()+1200);
setcookie("userName",$pass,time()+1200);
$flag = true;
header('location:adminPage.php?user=' . $user);
}
else
header('location:Login.php?login=relog');
/*
// 学生登录免校验
if($Enter)
header('location:StuPage.php');
*/

然后是注册的校验：

session_start();
$s_ID = $_POST['s_ID'];
$Name = $_POST['Name'];
$IDcard = $_POST['IDcard'];
$Major = $_POST['Major'];
$sex = $_POST['sex'];

$_SESSION['student'][$s_ID]['s_ID'] = $s_ID;
$_SESSION['student'][$s_ID]['Name'] = $Name;
$_SESSION['student'][$s_ID]['IDcard'] = $IDcard;
$_SESSION['student'][$s_ID]['Major'] = $Major;
$_SESSION['student'][$s_ID]['sex'] = $sex;
header('location:tisi.html');
/*foreach($_SESSION['student'] as $v)
{
if($v == $s_ID)
{
header("location:stu_reg.php?action=look&msg=更新&user=employee&empno=" . $empno . "&idcard=" . $idcard);
}
else
header("location:stu_reg.php?action=look&msg=增加&user=employee&empno=" . $empno . "&idcard=" . $idcard);
}*/

毕业操作及加入历史校验：

session_start();

$s_ID=$_GET['s_ID'];

$_SESSION['history'][$s_ID]['s_ID']=$s_ID;
$_SESSION['history'][$s_ID]['Name']=$_SESSION['student'][$s_ID]['Name'];
$_SESSION['history'][$s_ID]['IDcard']=$_SESSION['student'][$s_ID]['IDcard'];
$_SESSION['history'][$s_ID]['sex']=$_SESSION['student'][$s_ID]['sex'];
$_SESSION['history'][$s_ID]['Major']=$_SESSION['student'][$s_ID]['Major'];

unset($_SESSION['student'][$s_ID]);

header('location:graduate.php?user=Admin&action=delete');

任意关键词查询：

session_start();

$search=$_POST['search'];
unset($_SESSION['search']);

/*echo '

';
    var_dump($_POST['search']);
    return ;*/

    foreach ($_SESSION['student'] as $k1 => $value) {
        # code...
        if($search==$_SESSION['student'][$k1]['s_ID']||$search==$_SESSION['student'][$k1]['IDcard']||$search==$_SESSION['student'][$k1]['Name']||$search==$_SESSION['student'][$k1]['sex']||$search==$_SESSION['student'][$k1]['Major']){
            $i = 1;
            $stu = $_SESSION['student'][$k1]['s_ID'];
            $_SESSION['search'][$stu] = $stu;
        }
    }
    if(isset($i))
        header("location:stu_Query.php?user=Admin&action=search");
    else
         header("location:stu_Query.php?user=Admin&action=q_error");

遍历学生信息：









    session_start();
    $user = isset($_SESSION['user'])?$_SESSION['user']:'';
    if($user =='Admin'){
        if(isset($_SESSION['student'])){
            foreach($_SESSION['student'] as $k1) { 
            echo "";

            foreach($k1 as $k2=>$k3) {
            echo "";
            echo "";
            }
        }
    }
}
?>
        
" ;
            if($k2=='s_ID') {echo "学号:" ;} else if($k2=='IDcard'){echo "身份证号:";}else if($k2=='sex'){echo "性别:";}else if($k2=='Name'){echo "姓名:";}else if($k2 =='Major'){echo "专业:";}; 
            echo "
";
            if($k2=='s_ID') $s_ID=$k3;  echo "$k3"; 
            echo "




更新数据的页面及校验：





    session_start();
    $user = isset($_SESSION['user'])?$_SESSION['user']:'';
    $action = isset($_GET['action'])?$_GET['action']:'';
?>
















  
    

      



        
          
注意
        
      

    
  
  
    
一旦确定不可更改
  
请输入修改学生的学号:





    

    可以修改的项目：
    
        
学生姓名：
        

        
专业：    
        

        

            
性别：          
            
            男    
            女     

        

        
确定修改：      
            
          

    
    

    # code...
    echo "
已经改变
";
}?>



    session_start();
    $s_ID = $_POST['c_ID'];
    $Name = $_POST['Name'];
    $Major = $_POST['Major'];
    $sex = $_POST['sex'];

    $_SESSION['student'][$s_ID]['s_ID'] = $s_ID;
    $_SESSION['student'][$s_ID]['Name'] = $Name;
    $_SESSION['student'][$s_ID]['Major'] = $Major;
    $_SESSION['student'][$s_ID]['sex'] = $sex;

    header("location:stu_Update.php?action=enchange");