介绍
本系统是较为简单的一个可以完成学生信息、学生成绩的增删改查，按照班级学科查询学生成绩，查看所有表单，简单的完成学生选课与删除，查询考课名单等功能。
本系统为本人的期末大作业，所以有很多有待修改的bug以及很多有待优化的功能。
界面与其代码
1.主界面（index.php）
<html><head><title>学生信息管理系统</title></head><body><style type="text/css">
body{
background:url("bg.png") no-repeat;
background-size:100%;}
div{
font-size:30px;
font-weight: bold;
color:#000000;
margin-bottom:15px;}</style><div style="text-align: center;color: #000000;">学生信息管理系统</div><div style="text-align: center;color: #000000;"><a href="bd.php" target="test">表单</a><a href="cjcx.php" target="test">学生成绩查询</a><a href="xsb.php" target="test">学生表管理</a><a href="kcb.php" target="test">课程表管理</a><a href="xk.php" target="test">选课系统</a><a href="bk.php" target="test">补考名单</a><tr><td align="center" valign="middle"><iframe src="" height="800px" width="1200px" name="test" id="test" scrolling="yes" frameborder="0"></iframe></td></tr></div></body></html>
2.表单界面（bd.php）
<!DOCTYPE html><html><head><meta charset="UTF-8"><title>补考</title><style type="text/css">
table{margin:0 auto;}
td{text-align:center;}</style></head><body><h1 style="text-align: center;color: #000000;">学生表</h1><table width="100%" border="1" cellpadding="0" cellspacing="0" height="21" bordercolor="#cccccc" style="border-collapse"><tr backgorundcolor="#ffffff"><td width="10%"><p align="center">学号</td><td width="10%"><p align="center">姓名</td><td width="10%"><p align="center">性别</td><td width="10%"><p align="center">年龄</td><td width="10%"><p align="center">身份证</td><td width="10%"><p align="center">专业编号</td><td width="10%"><p align="center">班级</td><td width="10%"><p align="center">联系方式</td><td width="10%"><p align="center">家庭住址</td><td width="10%"><p align="center">备注</td><tr><?php$conn=mysqli_connect("localhost","root","123456","stumanage");mysqli_set_charset($conn,"set names 'utf8'");$sql="select * from student";$result=mysqli_query($conn,$sql);while($s=mysqli_fetch_array($result)){echo"<tr><td height=24>$s[0]</td>";echo"<td height=24 >$s[1]</td>";echo"<td height=24 >$s[2]</td>";echo"<td height=24 >$s[3]</td>";echo"<td height=24 >$s[4]</td>";echo"<td height=24 >$s[5]</td>";echo"<td height=24 >$s[6]</td>";echo"<td height=24 >$s[7]</td>";echo"<td height=24 >$s[8]</td>";echo"<td height=24 >$s[9]</td>";}echo"</tr>";?><table width="100%" border="1" cellpadding="0" cellspacing="0" height="21" bordercolor="#cccccc" style="border-collapse"><h1 style="text-align: center;color: #000000;">课程表</h1><tr backgorundcolor="#ffffff"><td width="10%"><p align="center">学号</td><td width="10%"><p align="center">姓名</td><td width="10%"><p align="center">课程编号</td><td width="10%"><p align="center">课程名</td><td width="10%"><p align="center">分数</td><tr><?php$conn=mysqli_connect("localhost","root","123456","stumanage");mysqli_set_charset($conn,"set names 'utf8'");$sql="select * from course";$result=mysqli_query($conn,$sql);while($s=mysqli_fetch_array($result)){echo"<tr><td height=24>$s[0]</td>";echo"<td height=24 >$s[1]</td>";echo"<td height=24 >$s[2]</td>";echo"<td height=24 >$s[3]</td>";echo"<td height=24 >$s[4]</td>";}echo"</tr>";?><table width="100%" border="1" cellpadding="0" cellspacing="0" height="21" bordercolor="#cccccc" style="border-collapse"><h1 style="text-align: center;color: #000000;">选课表</h1><tr backgorundcolor="#ffffff"><td width="10%"><p align="center">课程编号</td><td width="10%"><p align="center">课程名</td><td width="10%"><p align="center">主编</td><td width="10%"><p align="center">出版社</td><td width="10%"><p align="center">成绩</td><tr><?php$conn=mysqli_connect("localhost","root","123456","stumanage");mysqli_set_charset($conn,"set names 'utf8'");$sql="select student.sno,sname,course.cno,cname,degree from student,sc,course where student.sno=sc.sno and sc.cno =course.cno order by sno";$result=mysqli_query($conn,$sql);while($s=mysqli_fetch_array($result)){echo"<tr><td height=24>$s[0]</td>";echo"<td height=24 >$s[1]</td>";echo"<td height=24 >$s[2]</td>";echo"<td height=24 >$s[3]</td>";echo"<td height=24 >$s[4]</td>";}echo"</tr>";?></body></html>
3.学生成绩查询（cjcx.php）
<!DOCTYPE html><html><head><meta charset="UTF-8"><title>成绩查询</title><style type="text/css">
table{margin:0 auto;}
td{text-align:center;}</style></head><body><h1 style="text-align: center;color: #000000;">成绩查询</h1><form name="frm1" method="post"><table align="center"><tr><td width="100"><span>学生班级:</span></td><td><input name="sclass" id="sclass" type="text"></td><td width="100"><span>课程编号:</span></td><td><input name="cno" id="cno" type="text"><input type="submit" name="test" value="查找"></td></tr></table></form><br><table width="100%" border="1" cellpadding="0" cellspacing="0" height="21" bordercolor="#cccccc" style="border-collapse"><tr backgorundcolor="#ffffff"><td width="15%"><p align="center">班级</td><td width="15%"><p align="center">学号</td><td width="20%"><p align="center">姓名</td><td width="15%"><p align="center">课程号</td><td width="20%"><p align="center">课程名</td><td width="15%"><p align="center">分数</td><tr><?php$sno= @$_POST['sno'];$sclass= @$_POST['sclass'];$cno= @$_POST['cno'];$conn=mysqli_connect("localhost","root","123456","stumanage");mysqli_set_charset($conn,"set names 'utf8'");$sql="select sclass,student.sno,sname,course.cno,cname,degree from student,sc,course where student.sclass='$sclass' and student.sno=sc.sno and sc.cno='$cno'and sc.cno =course.cno";$result=mysqli_query($conn,$sql);while($s=mysqli_fetch_array($result)){echo"<tr><td height=24>$s[0]</td>";echo"<td height=24 >$s[1]</td>";echo"<td height=24 >$s[2]</td>";echo"<td height=24 >$s[3]</td>";echo"<td height=24 >$s[4]</td>";echo"<td height=24 >$s[5]</td>";}echo"</tr>";?></body></html>
4.学生表管理（xsb.php）
<!DOCTYPE html><html><head><meta charset="UTF-8"><title>学生信息更新</title><style type="text/css">
table{margin:0 auto;}
td{text-align:center;}</style></head><body><h1 style="text-align: center;color: #000000;">学生表管理</h1><form name="frm1" method="post"><table align="center"><tr><td width="100"><span>根据学号查询:</span></td><td><input name="sno" id="sno" type="text"><input type="submit" name="test" value="查找"></td></tr></table></form><br><?php$conn=mysqli_connect("localhost","root","123456","stumanage");mysqli_set_charset($conn,"set names 'utf8'");session_start();$number= @$_POST['sno'];$_SESSION['number']=$number;$sql="select * from student where sno='$number'";$result=mysqli_query($conn,$sql);$row= @mysqli_fetch_array($result);?><form name="frm2" method="post" enctype="multipart/form-data"><table border="1" align="center"><tr><td><span>学号：</span></td><td><input name="sno" type="text" value="<?php echo $row['sno']; ?>"><input name="h_sno" type="hidden" value="<?php echo $row['sno']; ?>"></td></tr><tr><td><span>姓名：</span></td><td><input name="sname" type="text" value="<?php echo $row['sname']; ?>"></td></tr><tr><td><span>性别：</span></td><td><input name="ssex" type="text" value="<?php echo $row['ssex']; ?>"></td></tr><tr><td><span>年龄：</span></td><td><input name="sage" type="text" value="<?php echo $row['sage']; ?>"></td></tr><tr><td><span>身份证号：</span></td><td><input name="sid" type="text" value="<?php echo $row['sid']; ?>"></td></tr><tr><td><span>专业编号：</span></td><td><input name="sspeciality" type="text" value="<?php echo $row['sspeciality']; ?>"></td></tr><tr><td><span>班级编号：</span></td><td><input name="sclass" type="text" value="<?php echo $row['sclass']; ?>"></td></tr><tr><td><span>联系方式：</span></td><td><input name="sphone" type="text" value="<?php echo $row['sphone']; ?>"></td></tr><tr><td><span>家庭住址：</span></td><td><input name="saddress" type="text" value="<?php echo $row['saddress']; ?>"></td></tr><tr><td><span>备注：</span></td><td><input name="sremarks" type="text" value="<?php echo $row['sremarks']; ?>"></td></tr><td align="center" colspan="2"><input name="b" type="submit" value="修改"> <input name="b" type="submit" value="添加"> <input name="b" type="submit" value="删除"> </td></tr></table></form></body></html><?php$num= @$_POST['sno'];$XH=@$_POST['sno'];$name= @$_POST['sname'];$XB= @$_POST['ssex'];$NL= @$_POST['sage'];$SFZH= @$_POST['sid'];$ZYBH= @$_POST['sspeciality'];$BJBH= @$_POST['sclass'];$LXFS= @$_POST['sphone'];$JTZZ= @$_POST['saddress'];$BZ= @$_POST['sremarks'];if(@$_POST["b"]=='修改'){if($num!=$XH){echo"<script>alert('学号与原数据有异，无法修改!');location.href='xsb.php'</script>";}else{$update_sql="update student set sname='$name',ssex='$XB',sage='$NL',sid='$SFZH',sspeciality='$ZYBH',sclass='$BJBH',sphone='$LXFS',saddress='$JTZZ',sremarks='$BZ' where sno='$XH'";$update_result=mysqli_query($conn,$update_sql);if(mysqli_affected_rows($conn)!=0){echo"<script>alert('修改成功!');location.href='xsb.php'</script>";}else{echo"<script>alert('修改失败!');location.href='xsb.php'</script>";}}}if(@$_POST["b"]=='添加'){$insert_sql="insert into student(sno,sname,ssex,sage,sid,sspeciality,sclass,sphone,saddress,sremarks) values('$XH','$name','$XB','$NL','$SFZH','$ZYBH','$BJBH','$LXFS','$JTZZ','$BZ')";$insert_result=mysqli_query($conn,$insert_sql);if(mysqli_affected_rows($conn)!=0){echo"<script>alert('添加成功!');location.href='xsb.php'</script>";}else{echo"<script>alert('添加失败!');location.href='xsb.php'</script>";}}if(@$_POST["b"]=='删除'){if($num==null){echo"<script>alert('请输入要删除的学号!')</script>";}else{$de_sql="select sno from student where sno='$num'";$de_result=mysqli_query($conn,$de_sql);$de_row=mysqli_fetch_array($de_result);if(!$de_row)echo"<script>alert('学号不存在，无法删除!')</script>";else{$del_sql="delete from student where sno='$num'";$del_result=mysqli_query($conn,$del_sql);if(mysqli_affected_rows($conn)!=0)echo"<script>alert('删除学号为".$num."的学生成功！')</script>";}}}?>
5.课程表管理（kcb.php）
<html><head><meta charset="UTF-8"><title>课程信息更新</title><style type="text/css">
table{margin:0 auto;}
td{text-align:center;}</style></head><body><h1 style="text-align: center;color: #000000;">课程表管理</h1><form name="frm1" method="post"><table align="center"><tr><td width="120"><span>根据课程号查询:</span></td><td><input name="cno" id="cno" type="text"><input type="submit" name="test" value="查找"></td></tr></table></form><?php$conn=mysqli_connect("localhost","root","123456","stumanage");mysqli_set_charset($conn,"utf8");$KCH=@$_POST['cno'];$sql="select * from course where cno='$KCH'";$result=mysqli_query($conn,$sql);$row=@mysqli_fetch_array($result);if(($cno!=NULL)&&(!$row))echo"<script>alert('没有该课程信息！')</script>";?><form name="frm2" method="post"><table border="1" align="center"><tr><td><span>课程编号:</span></td><td><input name="cno" type="text" value="<?php echo $row['cno'];?>"><input name="h_cno" type="hidden" value="<?php echo $row['h_cno'];?>"></td></tr><tr><td><span>课程名:</span></td><td><input name="cname" type="text" value="<?php echo $row['cname'];?>"></td></tr><tr><td><span>主编:</span></td><td><input name="ceditor" type="text" value="<?php echo $row['ceditor'];?>"></td></tr><tr><td><span>出版社:</span></td><td><input name="cpublish" type="text" value="<?php echo $row['cpublish'];?>"></td></tr><tr><td><span>学分:</span></td><td><input name="ccredit" type="text" value="<?php echo $row['ccredit'];?>"></td></tr><tr><td align="center" colspan="2"><input name="b" type="submit" value="修改"> <input name="b" type="submit" value="添加"> <input name="b" type="submit" value="删除"> </td></tr></table></form></body></html><?php$KCH=@$_POST['cno'];$h_KCH=@$_POST['cno'];$KCM=@$_POST['cname'];$ZB=@$_POST['ceditor'];$CBS=@$_POST['cpublish'];$XF=@$_POST['ccredit'];if(@$_POST["b"]=='修改'){if($KCH!=$h_KCH)echo"<script>alert('课程编号与原数据有异，无法修改！');</script>";else{$update_sql="update course set cname='$KCM',ceditor='$ZB',cpublish='$CBS',ccredit='$XF' where cno='$KCH'";$update_result=mysqli_query($conn,$update_sql);if(mysqli_affected_rows($conn)!=0)echo"<script>alert('修改成功！');</script>";elseecho"<script>alert('信息未修改！');</script>";}}//单击【添加】按钮if(@$_POST["b"]=='添加'){$insert_sql="insert into course(cno,cname,ceditor,cpublish,ccredit) values('$KCH','$KCM','$ZB','$CBS','$XF')";$insert_result=mysqli_query($conn,$insert_sql)ordie('添加失败!');if(mysqli_affected_rows($conn)!=0)echo"<script>alert('添加成功!');</script>";}//单击【删除】按钮if(@$_POST["b"]=='删除'){if(!$KCH){echo"<script>alert('请输入要删除的课程号！');</script>";}else{$d_sql="select cno from course where cno='$KCH'";$d_result=mysqli_query($conn,$d_sql);$d_row=mysqli_fetch_array($d_result);if(!$d_row)echo"<script>alert('课程编号不存在，无法删除！');</script>";else{$del_sql="delete from course where cno='$KCH'";$del_result=mysqli_query($conn,$del_sql)ordie('删除失败!');if(mysqli_affected_rows($conn)!=0)echo"<script>alert('删除课程".$KCH."成功!');</script>";}}}?>
6.选课系统（xk.php）
<!DOCTYPE html><html><head><meta charset="UTF-8"><title>补考</title><style type="text/css">
table{margin:0 auto;}
td{text-align:center;}</style></head><body><h1 style="text-align: center;color: #000000;">选课表</h1><table width="100%" border="1" cellpadding="0" cellspacing="0" height="21" bordercolor="#cccccc" style="border-collapse"><tr backgorundcolor="#ffffff"><td width="20%"><p align="center">课程编号</td><td width="20%"><p align="center">课程名</td><td width="20%"><p align="center">老师</td><td width="20%"><p align="center">教学用书出版社</td><td width="20%"><p align="center">学分</td></tr><?php$conn=mysqli_connect("localhost","root","123456","stumanage");mysqli_set_charset($conn,"set names 'utf8'");$sql="select * from course";$result=mysqli_query($conn,$sql);while($s=mysqli_fetch_array($result)){echo"<tr><td height=24>$s[0]</td>";echo"<td height=24 >$s[1]</td>";echo"<td height=24 >$s[2]</td>";echo"<td height=24 >$s[3]</td>";echo"<td height=24 >$s[4]</td>";}echo"</tr>";?><form name="frm1" method="post"><table align="center"><h2><p style="text-align: center;color: #000000;">选课</h2></p><tr><td width="100"><span>选课学生学号:</span></td><td><input name="sno" id="sno" type="text"></td><td width="100"><span>所选课编号:</span></td><td><input name="cno" id="cno" type="text"><input type="submit" name="test" value="选课"></td></tr></table><?php$sno= @$_POST['sno'];$cno= @$_POST['cno'];if(@$_POST["test"]=='选课'){$insert_sql="insert into sc(sno,cno) values('$sno','$cno')";$insert_result=mysqli_query($conn,$insert_sql)ordie('添加失败!');if(mysqli_affected_rows($conn)!=0)echo"<script>alert('选课成功!');</script>";}?></form><h3 style="text-align: center;color: #000000;">修改选课</h3><form name="frm1" method="post"><table align="center"><tr><td width="100"><span>学号:</span></td><td><input name="sno" id="sno" type="text"></td><td width="100"><span>选错课程号:</span></td><td><input name="cno" id="cno" type="text"><input type="submit" name="test" value="查找"></td></tr></table></form><?php$conn=mysqli_connect("localhost","root","123456","stumanage");mysqli_set_charset($conn,"utf8");$cno=@$_POST['cno'];$sno=@$_POST['sno'];$sql="select * from sc where cno='$cno'AND sno='$sno'";$result=mysqli_query($conn,$sql);$row=@mysqli_fetch_array($result);?><form name="frm2" method="post"><table border="1" align="center"><tr><td><span>学号:</span></td><td><input name="sno" type="text" value="<?php echo $row[0];?>"></td></tr><tr><td><span>课程号:</span></td><td><input name="cno" type="text" value="<?php echo $row[1];?>"></td></tr><tr><td align="center" colspan="2"><input name="b" type="submit" value="删除"> </td></tr></table></form></body></html><?php$sno=@$_POST['sno'];$cno=@$_POST['cno'];if(@$_POST["b"]=='删除'){if(!$cno){echo"<script>alert('请输入要删除的课程号！');</script>";}$del_sql="delete from sc where cno='$cno' and sno='$sno'";$del_result=mysqli_query($conn,$del_sql)ordie('删除失败!');if(mysqli_affected_rows($conn)!=0)echo"<script>alert('删除成功!');</script>";}?></body></html>
7.补考名单（bk.php）
<!DOCTYPE html><html><head><meta charset="UTF-8"><title>补考</title><style type="text/css">
table{margin:0 auto;}
td{text-align:center;}</style></head><body><h1 style="text-align: center;color: #000000;">以下学生需要补考</h1><table width="100%" border="1" cellpadding="0" cellspacing="0" height="21" bordercolor="#cccccc" style="border-collapse"><tr backgorundcolor="#ffffff"><td width="20%"><p align="center">学号</td><td width="20%"><p align="center">姓名</td><td width="20%"><p align="center">课程号</td><td width="20%"><p align="center">课程名</td><td width="20%"><p align="center">分数</td><tr><?php$conn=mysqli_connect("localhost","root","123456","stumanage");mysqli_set_charset($conn,"set names 'utf8'");$sql="select sc.sno,sname,sc.cno,cname,degree from student,sc,course where sc.degree<60 and student.sno=sc.sno and sc.cno =course.cno order by sno";$result=mysqli_query($conn,$sql);while($s=mysqli_fetch_array($result)){echo"<tr><td height=24>$s[0]</td>";echo"<td height=24 >$s[1]</td>";echo"<td height=24 >$s[2]</td>";echo"<td height=24 >$s[3]</td>";echo"<td height=24 >$s[4]</td>";}echo"</tr>";?></body></html>
数据库部分
学生表（student）
字段名称 数据类型 长度 是否为空
学号 （sno） char 10 N
姓名（ sname） varchar 8 N
性别（ssex） varchar 8 N
年龄（sage） varchar 8 N
身份证号（sid） varchar 8 N
专业编号（sspeciality） varchar 60 N
课程编号（sclass） varchar 8 N
联系方式（sphone） varchar 12 N
家庭住址（saddress） varchar 60 N
备注（sremarks） Varchar 60 N
课程表（course）
字段名称 数据类型 长度 是否为空
课程编号（cno） varchar 8 N
课程名称（cname） varchar 60 N
主编（ceditor） varchar 20 N
出版社（cpublish） varchar 20 N
学分（ccredut） decimal (4,1) N
选课表（sc）
字段名称 数据类型 长度 是否为空
学号（sno） char 10 N
课程编号（cno） varchar 8 N
分数（degree） decimal (4,1) N
本文转载自: https://blog.csdn.net/tb20010713/article/details/125323013
版权归原作者 旧绳 所有， 如有侵权，请联系我们删除。
版权归原作者 旧绳 所有， 如有侵权，请联系我们删除。