php对mysql的增删改

<?php

//连接到数据库
    $db=new MySQLi("localhost","root","","z_stu");
    !mysqli_connect_error() or die("连接失败");
    $db->query("set names utf8");
    //查询老师列表
    $sql="select * from teacher";
    //执行sql语句
    $result=$db->query($sql);
    //将结果转换成数组
    $attr=$result->fetch_all();
    
    
?>
    <table border="1" width="50%">
        <caption>老师表</caption> 
        <tr>
            <th>编号</th>
            <th>姓名</th>
            <th>性别</th>
            <th>生日</th>
            <th>职称</th>
            <th>所在系</th>
            <th>操作</th>
        </tr>
        <?php
        //循环打印老师信息
        foreach($attr as $k=>$v){?>
            <tr>
            <td><?php echo $v[0]; ?></td><!--编号-->
                <td><?php echo $v[1]; ?></td><!--姓名-->
                <td><?php echo $v[2]=="男" ? "男" : "女";?></td><!--性别-->
                <td><?php echo substr($v[3],0,10);?></td><!--截取生日到天-->
                <td><?php echo $v[4]; ?></td><!--职称-->
                <td><?php echo $v[5]; ?></td><!--所在系-->
                <td>
<!--                    方法一:
                    <a href="chuli/delete.php?uid=老师编号">
                        <button>删除</button>
                    </a>
                    
-->
                    <!--方法2:-->
                    <form action="chuli/delete.php" method="post">
                        <input type="hidden" name="uid" value="<?php echo $v[0]; ?>">
                        <button onClick="del(this)" class="btn" uid="<?php echo $v[0]; ?>" >删除</button>
                    </form>
                    <a href="chuli/update.php?type=update&tno=<?php echo $v[0]; ?>">
                        <button>编辑</button>
                    </a>
                    
                </td>
            </tr>
        <?php }
        ?>
    </table>
    <a href="chuli/update.php?type=add">
        <button>添加数据</button>
<script>

2、删除

<?php
    //获取传值
    $uid=$_POST["uid"];
    $useid=$_GET["useid"];
    //连接到数据库
    $db=new MySQLi("localhost","root","","z_stu");
    !mysqli_connect_error() or die("连接失败");
    $db->query("set names utf8");
    //写删除sql语句
    $sql="delete from teacher where tno='$uid'";
    //执行sql语句
    $result=$db->query($sql);
    
    if($result){
        header("location:../index.php");
    }else{
        header("location:../index.php?id=1");
    }
?>

3、编辑和添加数据都是对老师信息进行操作,所以可以用一个php文件进行操作

<?php
    //接收编辑传过来的值
    $type=$_GET["type"];
    $tno=$_GET["tno"];
    //连接到数据库
        $db=new MySQLi("localhost","root","","z_stu");
        !mysqli_connect_error() or die("连接失败");
        $db->query("set names utf8");
    if($type=="update"){
        $sql="select * from teacher where tno='$tno'";
        $result=$db->query($sql);
        $attr=$result->fetch_row();
    }

    $proName=array("助教","副教授","教授","讲师");
    $dpName=array("计算机系","电子工程系","数学系");
    
?>
<fieldset>
    <legend>
        <?php echo $type=="update"? "编辑":"添加" ?> 数据
    </legend>
    <form action="insert.php" method="post">
        <input type="hidden" name="type" value="<?php echo $type ?>"><!-- -->
        <table>
            <tr>
                <td>编号</td>
                <td>
                    <input type="text" name="tno" value="<?php echo $attr[0]==null ?"":$attr[0];?> " <?php echo $type=="update"? readonly:""; ?> >
                </td>
            </tr>
            <tr>
                <td>姓名</td>
                <td>
                    <input type="text" name="tname"  value="<?php echo $attr[1]==null ?"":$attr[1];?> ">
                </td>
            </tr>
            <tr>
                <td>性别</td>
                <td>
                    <input type="radio" name="tsex" value="男" <?php echo $attr[2] == "男"? "checked":"" ?> ><input type="radio" name="tsex" value="女" <?php echo $attr[2] == "女"? "checked":"" ?> ></td>
            </tr>
            <tr>
                <td>出生年月日</td>
                <td>
                    <input type="text" name="tbirthday" class="form_datetime"  value="<?php echo $attr[3]==null ?"":$attr[3];?>">
                </td>
            </tr>
            <tr>
                <td>职称</td>
                <td>
                    <select name="pro" id="">
                    <?php
                        foreach($proName as $v){
                            if($v==$attr[4]){
                                echo "<option selected> $v</option>";
                            }else{
                                echo "<option> $v</option>";
                            }    
                        }
                    ?>
                    </select>
                </td>
            </tr>
            <tr>
                <td>所在系</td>
                <td>
                    <select name="depan" id="">
                        <option >计算机系</option>
                        <option >电子工程系</option>
                    </select>
                </td>
            </tr>
        </table>
        <button >提交</button>
    </form>
</fieldset>

效果:

接收数据,并执行相应的sql语句

<?php
//这个页面用来添加传过来的值到teacher表中
$type=$_POST["type"];
$tno=$_POST["tno"];//老师编号
$tname=$_POST["tname"];//老师姓名
$tsex=$_POST["tsex"];//老师性别
$tbirthday=$_POST["tbirthday"];//老师生日
$prof=$_POST["pro"];//老师职称
$depan=$_POST["depan"];//所在系
//连接到数据库
$db=new MySQLi("localhost","root","","z_stu");
!mysqli_connect_error() or die("连接失败");
$db->query("set names utf8");
//写添加sql语句
if($type=="add"){
    $sql="insert into teacher(tno,tname,tsex,tbirthday,prof,depan) values('$tno','$tname','$tsex','$tbirthday','$prof','$depan')";
}else if($type=="update"){
    $sql="update teacher set tname='$tname',tsex='$tsex',tbirthday='$tbirthday',prof='$prof',depan='$depan' where tno='$tno'";
}

$result=$db->query($sql);
header("location:../index.php");
?>
原文地址:https://www.cnblogs.com/chenyang-1/p/8419332.html