当先锋百科网

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一、用户登录界面

学生综合评分系统
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二、后台处理

<?php   session_start(); header("Content-Type:text/html;charset=gbk"); //isset检测变量是否被设置,最好使用上,可以不使用他的。 //学生登录    if(isset($_POST["login_student"]) && $_POST["login_student"] =="学生登录"){           $user = $_POST["username"];           $psw  = $_POST["password"];         if($user == "" || $psw == ""){               //alert是警告的意思。这句的主要做用就是弹出警告,返回上一页。             echo "";  //弹出提示框返回上一页                 }else if($row[4]!=$psw){                                      echo "";  //弹出提示框返回上一页                       }else{                             $_SESSION["Student_Name"]=$row[1];//页面显示登录人的姓名。                             $_SESSION["username"]=$row[3];                             $_SESSION["Student_ID"]=$row[0];                             $_SESSION["Student_Class"]=$row[2];                             if($row[5]=="A"){                                 header("Location: http://192.168.116.128/school/studentA/exam/exam.php");//跳转到这个界面。                             }else if($row[5]=="B"){                                 header("Location: http://192.168.116.128/school/studentB/exam/exam.php");//跳转到这个界面。                             }else if($row[5]=="C"){                                 header("Location: http://192.168.116.128/school/studentC/exam/exam.php");//跳转到这个界面。                             }                 }             }         }     }     if(isset($_POST["login_teacher"]) && $_POST["login_teacher"] =="教师登录"){         $user = $_POST["username"];           $psw  = $_POST["password"];         if($user == "" || $psw == ""){               //alert是警告的意思。这句的主要做用就是弹出警告,返回上一页。             echo "";  //弹出提示框返回上一         }else{             $con=mysql_connect("localhost","root","9277");               mysql_select_db("School",$con);               mysql_query("set names 'gbk'");               $result=mysql_query("select * from Teacher where Username ='$user' ");//mysql_query 查询数据库的函数             while($row=mysql_fetch_array($result)){                 if($row[2]==""){                             echo "";  //弹出提示框返回上一页                 }else if($row[3]!=$psw){                                      echo "";  //弹出提示框返回上一页                       }else{                         $_SESSION["teacher_Name"]=$row[0];//页面显示登录教师的姓名。                         $_SESSION["teacher_Class"]=$row[4];                         header("Location: http://192.168.116.128/school/teacher/exam/exam.php");                 }             }         }     } ?>