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老师批语：
使用软删除技术，来实现对员工信息中的记录删除操作
三个要点：
1.员工表中添加一个is_show字段,用来控制员工信息的显示与隐藏,
2.删除操作的SQL语句 不是用DELETE删除记录,而是用UPDATE语句更新is_show字段的值1:显示,0:隐藏
3.在staff_list.php显示输出员工记录的时候再增加一个条件(判断is_show的值 ,如果值是1,就显示出来,如果是0就不显示,表示删除了这条记录)
<?php
$pdo = new PDO('mysql:host=127.0.0.1;dbname=php','root','root');
$action = strtolower(trim($_GET['action']));
//根据cation的值，执行对应的操作
switch ($action) {
case 'add':
//sql
$sql = 'INSERT INTO `staff`
(`name`,`age`,`sex`,`position`,`mobile`,`hiredate`) VALUES
(:name,:age,:sex,:position,:mobile,:hiredate)';
$stmt = $pdo->prepare($sql);
$name = trim($_POST['name']);
$age = trim($_POST['age']);
$sex = trim($_POST['sex']);
$position = trim($_POST['position']);
$mobile = trim($_POST['mobile']);
$hiredate = time();
//绑定参数
$stmt->bindValue(':name',$name,PDO::PARAM_STR);
$stmt->bindValue(':age',$age,PDO::PARAM_INT);
$stmt->bindValue(':sex',$sex,PDO::PARAM_INT);
$stmt->bindValue(':position',$position,PDO::PARAM_STR);
$stmt->bindValue(':mobile',$mobile,PDO::PARAM_STR);
$stmt->bindValue(':hiredate',$hiredate,PDO::PARAM_INT);
if ($stmt->execute()) {
if ($stmt->rowCount() === 1) {
$status = 1;
$message = '新增成功';
} else if ($stmt->rowCount() === 0) {
$status = 0;
$message = '没有记录被新增';
}
} else {
$status = -1;
$message = '新增失败，请检查';
}
echo json_encode(['status'=>$status, 'message'=>$message]);
break;
case 'save':
$sql = 'UPDATE `staff` SET
`name`=:name, `age`=:age, `sex`=:sex,
`position`=:position, `mobile`=:mobile
WHERE `id`=:id';
$stmt = $pdo->prepare($sql);
$name = trim($_POST['name']);
$age = trim($_POST['age']);
$sex = trim($_POST['sex']);
$position = trim($_POST['position']);
$mobile = trim($_POST['mobile']);
$id = $_POST['id'];
//绑定参数
$stmt->bindValue(':name',$name,PDO::PARAM_STR);
$stmt->bindValue(':age',$age,PDO::PARAM_INT);
$stmt->bindValue(':sex',$sex,PDO::PARAM_INT);
$stmt->bindValue(':position',$position,PDO::PARAM_STR);
$stmt->bindValue(':mobile',$mobile,PDO::PARAM_STR);
$stmt->bindValue(':id',$id,PDO::PARAM_INT);
if ($stmt->execute()) {
if ($stmt->rowCount() === 1) {
$status = 1;
$message = '更新成功';
} else if ($stmt->rowCount() === 0) {
$status = 0;
$message = '没有记录被更新';
}
} else {
$status = -1;
$message = '更新失败，请检查';
}
echo json_encode(['status'=>$status, 'message'=>$message]);
break;
//删除操作
/* case 'del':
$sql = 'DELETE FROM `staff` WHERE `id`=:id';
$stmt = $pdo->prepare($sql);
if ($stmt->execute(['id'=>$_GET['id']])) {
echo '<script>alert("删除成功");top.location.assign("index.php");</script>';
}
break;*/
//利用软删除技术来实现删除
case 'del':
$sql = 'UPDATE `staff` SET `is_show`=0 WHERE `id`=:id';
$stmt = $pdo->prepare($sql);
if ($stmt->execute(['id'=>$_GET['id']])) {
echo '<script>alert("删除成功");top.location.assign("index.php");</script>';
}
break;
}点击 "运行实例" 按钮查看在线实例
<?php
// 员工信息
//1.连接数据库
$pdo = new PDO('mysql:host=127.0.0.1;dbname=php','root','root');
//2.执行的操作
$sql = 'SELECT * FROM `staff` WHERE `is_show`=1 LIMIT 5';
$stmt = $pdo->prepare($sql);
$stmt->execute();
$staffs = $stmt->fetchAll(PDO::FETCH_ASSOC);
//3.关闭连接
$pdo = null;
// 标题
$title = '员工信息表';
// 表格标题
$tableTitle = $title;
// 员工数量
$total = count($staffs);
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title><?php echo $title; ?></title>
<style>
table,th,td {
border: 1px solid #666;
padding: 8px;
}
table {
border-collapse: collapse;
width: 80%;
text-align: center;
margin: 30px auto;
}
thead tr:first-of-type {
background-color: lightblue;
}
tbody tr:hover {
background-color: #efefef;
}
table > caption {
font-size: 1.2rem;
margin-bottom: 15px;
}
table + p {
text-align: center;
}
button:hover {
cursor: pointer;
background-color: lightblue;
}
/*添加按钮给个特殊样式*/
#add {
height: 25px;
width: 90px;
position: absolute;
left: 650px;
top: 40px;
}
</style>
</head>
<body>
<button onclick="location.href='staff_add.php'" id="add">添加</button>
<table>
<caption>
<?php
echo '<span style="color:red">' . $tableTitle . '</span>';
?>
</caption>
<thead>
<tr>
<th>编号</th>
<th>姓名</th>
<th>年龄</th>
<th>性别</th>
<th>手机</th>
<td>入职</td>
<th>操作</th>
</tr>
</thead>
<tbody>
<!--foreach()替代语法-->
<?php foreach($staffs as $staff) : ?>
<tr>
<td><?php echo $staff['id']; ?></td>
<td><?php echo $staff['name']; ?></td>
<td><?php echo $staff['age']; ?></td>
<!--if()替代语法-->
<td>
<?php if($staff['sex'] == 1) : ?>
男
<?php else: ?>
女
<?php endif; ?>
</td>
<!--如果只是简单的输出变量可以使用php短标签语法-->
<td><?=$staff['mobile']?></td>
<td>
<?php
echo date('Y/m/d',$staff['hiredate']);
?>
</td>
<td>
<button onclick="location.href='staff_edit.php?id=<?=$staff['id']?>'">编辑</button>
<button onclick="return confirm('是否删除？') ? location.assign('staff_manage.php?action=del&id=<?=$staff['id']?>') : false"><span style="color:red">删除</span></button>
</td>
</tr>
<?php endforeach;?>
</tbody>
</table>
<p>总计:
<?php echo $total; ?>
人</p>
</body>
</html>点击 "运行实例" 按钮查看在线实例
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