这里实现一个简单的学生管理系统，供大家参考，具体内容如下
需要建立如下文件：
- index.php
- menu.php //菜单栏
- add.php //添加数据
- edit.php // 编辑数据
- action.php // 添加，删除，编辑的实现
分别写一下每个文件的代码：
menu.php:
<html> <h2>学生信息管理</h2> <a href="index.php" rel="external nofollow" >浏览学生</a> <a href="add.php" rel="external nofollow" >增加学生</a> <hr> </html>
index.php
<html>
<head>
<meta charset="utf-8">
<title>学生信息管理系统</title>
</head>
<script>
function dodel(id){
if(confirm("是否要删除")){
window.location='action.php?action=del&id='+id;
}
}
</script>
<body>
<center>
<?php include("menu.php");?>
<h3>浏览学生信息</h3>
<table width="600" border="1">
<tr>
<th>id</th>
<th>姓名</th>
<th>姓别</th>
<th>年龄</th>
<th>班级</th>
<th>操作</th>
</tr>
<?php
//1. 连接数据库
try{
$pdo = new pdo("mysql:host=localhost;dbname=myapp;", "root", "");
}catch(pdoexception $e){
die("fail to connect db".$e->getmessage());
}
//2. 执行数据库，并解析遍历
$sql = "select * from users";
foreach($pdo->query($sql) as $val){
echo "<tr>";
echo "<td>{$val['id']}</td>";
echo "<td>{$val['name']}</td>";
echo "<td>{$val['sex']}</td>";
echo "<td>{$val['age']}</td>";
echo "<td>{$val['class']}</td>";
echo "<td>
<a href='javascript:dodel({$val['id']})'>删除</a>
<a href='edit.php?id={$val['id']}'>修改</a>
</td>";
echo "</tr>";
}
?>
</table>
</center>
</body>
</html>
add.php
<html>
<head>
<meta charset="utf-8">
<title>学生信息管理系统</title>
</head>
<body>
<center>
<?php include("menu.php");?>
<h3>增加学生信息</h3>
<form action="action.php?action=add" method="post">
<table>
<tr>
<td>姓名</td>
<td><input type="text" name="name"/></td>
</tr>
<tr>
<td>姓别</td>
<td>
<input type="radio" name="sex" value="m"/>男
<input type="radio" name="sex" value="w"/>女
</td>
</tr>
<tr>
<td>年龄</td>
<td><input type="text" name="age"/></td>
</tr>
<tr>
<td>班级</td>
<td><input type="text" name="class"/></td>
</tr>
<tr>
<td> </td>
<td>
<input type="submit" value="增加"/>
<input type="submit" value="重置"/>
</td>
</tr>
</table>
</form>
</center>
</body>
</html>
edit.php
<html>
<head>
<meta charset="utf-8">
<title>学生信息管理系统</title>
</head>
<body>
<center>
<?php include("menu.php");
//获取修改信息
//1. 连接数据库
try{
$pdo = new pdo("mysql:host=localhost;dbname=myapp;", "root", "");
}catch(pdoexception $e){
die("fail to connect db".$e->getmessage());
}
//2. 拼装sql语句，取出信息
$sql = "select * from users where id=".$_get['id'];
$stmt = $pdo->query($sql);
if($stmt->rowcount() > 0){
$stu = $stmt->fetch(pdo::fetch_assoc); //解析数据
}else{
die("没有修改的信息");
}
?>
<h3>修改学生信息</h3>
<form action="action.php?action=edit" method="post">
<!-- 以隐藏域的方式添加id -->
<input type="hidden" name="id" value="<?php echo $stu['id']; ?>">
<table>
<tr>
<td>姓名</td>
<td><input type="text" name="name" value="<?php echo $stu['name'];?>"/></td>
</tr>
<tr>
<td>姓别</td>
<td>
<input type="radio" name="sex" value="m" <?php echo ($stu['sex']==
"m")? "checked": ""; ?>/>男
<input type="radio" name="sex" value="w" <?php echo ($stu['sex']==
"w")? "checked": ""; ?>/>女
</td>
</tr>
<tr>
<td>年龄</td>
<td><input type="text" name="age" value="<?php echo $stu['age'];?>"/></td>
</tr>
<tr>
<td>班级</td>
<td><input type="text" name="class" value="<?php echo $stu['class'];?>"/></td>
</tr>
<tr>
<td> </td>
<td>
<input type="submit" value="修改"/>
<input type="submit" value="重置"/>
</td>
</tr>
</table>
</form>
</center>
</body>
</html>
action.php
<?php
//1. 连接数据库
try{
$pdo = new pdo("mysql:host=localhost;dbname=myapp;", "root", "");
}catch(pdoexception $e){
die("fail to connect db".$e->getmessage());
}
//2. 通过action的值做相应的操作
switch($_get['action']){
case "add": //增加操作
$name = $_post['name'];
$sex = $_post['sex'];
$age = $_post['age'];
$class = $_post['class'];
$sql = "insert into users values (null, '{$name}','{$sex}', '{$age}', '{$class}')";
$rw = $pdo->exec($sql);
if($rw > 0){
echo "<script>alert('增加成功'); window.location='index.php'</script>";
}else{
echo "<script>alert('增加失败'); window.history.back()</script>";
}
break;
case "del":
$id = $_get['id'];
$sql = "delete from users where id={$id}";
$pdo->exec($sql);
header("location:index.php");
break;
case "edit":
$name = $_post['name'];
$sex = $_post['sex'];
$age = $_post['age'];
$class = $_post['class'];
$id = $_post['id'];
$sql = "update users set name='{$name}',sex='{$sex}',age={$age},class={$class}
where id={$id}";
$rw = $pdo->exec($sql);
if($rw > 0){
echo "<script>alert('修改成功'); window.location='index.php'</script>";
}else{
echo "<script>alert('修改失败'); window.history.back()</script>";
}
break;
}
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