PHP MySQLi 增删改查

来源：互联网发布：linux运行中结束进程编辑：程序博客网时间：2024/05/19 01:11

1：登陆页面

//前端显示部分<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title></head><body><h2>管理员登陆</h2><form action="dlyz.php" method="post"><div>用户名：<input type="text" name="user" value="请输入您的工号" /></div><br /><div>密  码：<input type="password" name="psd" /></div><br /><input type="submit" value="登录" /><input type="submit" value="注册新用户" formaction="zhuc.php"/></form></body></html>

//php对提交登陆信息的处理

<?php$user = $_POST["user"];$psd = $_POST["psd"];//造对象$db = new MySQLi("localhost","root","","newssystem");//判断是否出错!mysqli_connect_error() or die("连接失败！！");//写sql语句$sql = "select psd from yonghu where user='{$user}'";//执行SQL语句$result = $db-> query($sql);$v = $result->fetch_row();if($psd==$v[0]){header("location:fabuxinwen.php");}else{echo"您输入的用户名或密码不正确，请重新输入！！";}

2：注册页面

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title></head><body><h2>欢迎注册</h2><body><form action="zhucyz.php"method="post"><div>用户名：<input type="text" name="user" value="请输入您的工号"/></div><br /><div>密  码：<input type="password" name="psd" /></div><br /><input type="submit" value="提交" /></form></body></html> <?php$user = $_POST["user"];$psd = $_POST["psd"];//造对象$db = new MySQLi("localhost","root","","newssystem");//判断是否出错!mysqli_connect_error() or die("连接失败！！");//写sql语句$sql = "insert into yonghu values('{$user}','{$psd}')";//执行SQL语句$result = $db-> query($sql);if($result){header("location:dl.php");}else{echo"很抱歉，注册失败！！";}

3：登陆进去以后，是发布页面，可以发布和查看

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title></head><body><div style="width:100%; text-align:center" ><h2>发布新闻</h2><form method="post"><input type="hidden" name="newsid"/><table style="margin:0 auto; text-align:left" ><tr><td >标题：</td><td><input type="text" style="width:400px" name="title" /></td></tr><tr><td >作者：</td><td><input type="text" style="width:400px" name="Author" /></td></tr><tr><td >来源：</td><td><input type="text" style="width:400px" name="source"/></td></tr><tr><td >内容：</td><td><textarea cols="auto" rows="auto" style="width:400px; height:400px" name="content"></textarea></td></tr></table><br /><?php$time = date('y-m-d h:i:s');echo "<input type=\"hidden\" name=\"time\" value=\"{$time}\"/>";?><input type="submit" value="提交" formaction="tijiao.php"/><input type="submit" value="查看" formaction="chakan.php"/></form></div></body></html>

<?php$title = $_POST["title"];$Author = $_POST["Author"];$source = $_POST["source"];$content = $_POST["content"];//造对象$db = new MySQLi("localhost","root","","newssystem");//判断是否出错!mysqli_connect_error() or die("添加失败！！");//写sql语句$sql = "insert into news(title,Author,source,content) values('{$title}','{$Author}','{$source}','{$content}')";//执行SQL语句$result = $db-> query($sql);if($result){header("location:fabuxinwen.php");}else{echo"很抱歉，添加失败！！";}

4：查看页面

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title></head><body><table width="70%" border="1px" cellpadding="0" cellspacing="0" style="text-align:center"><tr><td>编号</td><td>标题</td><td>作者</td><td>来源</td><td>日期</td><td>删除</td><td>修改</td></tr><?php$db=new mysqli("localhost","root","","newssystem");!mysqli_connect_error() or die("连接错误");$sql="select * from news";$result=$db->query($sql);while($attr=$result->fetch_row()){echo "<tr><td>{$attr[0]}</td><td>{$attr[1]}</td><td>{$attr[2]}</td><td>{$attr[3]}</td><td>{$attr[5]}</td><td><a onclick=\" return confirm('确定删除')\" href='scchuli.php?newsid={$attr[0]}'>删除</a></td><td><a href='xiugai.php?newsid={$attr[0]}'>修改</a></td></tr> ";}?></table></body></html>

5：在查看页面可以进行修改和删除

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档</title></head><body><?php$id = $_GET["newsid"];$db=new mysqli("localhost","root","","newssystem");!mysqli_connect_error() or die("连接错误");$sql="select * from news where newsid='{$id}'";$result=$db->query($sql);$attr=$result->fetch_row();?><div style="width:100%; text-align:center" ><h2>修改新闻</h2><form action="xgchuli.php" method="post"><input type="hidden" name="newsid" <?php echo "value='{$attr[0]}'";?>/><table style="margin:0 auto; text-align:left" ><tr><td >标题：</td><td><input type="text" style="width:400px" name="title" <?php echo "value='{$attr[1]}'";?>/></td></tr><tr><td >作者：</td><td><input type="text" style="width:400px" name="Author" <?php echo "value='{$attr[2]}'";?>/></td></tr><tr><td >来源：</td><td><input type="text" style="width:400px" name="source" <?php echo "value='{$attr[3]}'";?>/></td></tr><tr><td >内容：</td><td><textarea cols="auto" rows="auto" style="width:400px; height:400px" name="content"><?php echo "{$attr[4]}";?></textarea></td></tr></table><br /><?php$time = date('y-m-d h:i:s');echo "<input type=\"hidden\" name=\"time\" value=\"{$time}\"/>";?><div><a href="chakan.php"><input type="button" title="查看" value="查看" /></a><input type="submit" title="修改" value="修改"/></div></form></body></html> <?php$id=$_POST["newsid"];$title=$_POST["title"];$Author=$_POST["Author"];$source=$_POST["source"];$content=$_POST["content"];$time=$_POST["time"];$db = new MySQLi("localhost","root","","newssystem");!mysqli_connect_error() or die("连接失败");$sql="update news set title='{$title}',Author='{$Author}',source='{$source}',content='{$content}',time='{$time}' where newsid='{$id}' ";$result=$db->query($sql);if ($result){header("location:chakan.php");}else{echo "修改失败";}

//删除数据

<?php$id=$_GET["newsid"];$db=new mysqli("localhost","root","","newssystem");!mysqli_connect_error() or die("连接失败");$sql="delete from news where newsid='{$id}'";$result=$db->query($sql);if ($result){header("location:chakan.php");}else{echo "删除失败";}

6：修改页面

<?php$title = $_POST["title"];$Author = $_POST["Author"];$source = $_POST["source"];$content = $_POST["content"];//造对象$db = new MySQLi("localhost","root","","newssystem");//判断是否出错!mysqli_connect_error() or die("添加失败！！");//写sql语句$sql = "insert into news(title,Author,source,content) values('{$title}','{$Author}','{$source}','{$content}')";//执行SQL语句$result = $db-> query($sql);if($result){header("location:fabuxinwen.php");}else{echo"很抱歉，添加失败！！";}

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