PHP简单同学录（连接数据库）

这个是学PHP时写的一个简单的php同学录作业，用的DW和wamp使用sqli连接数据库，比较简单没有写登录界面（需要的可自行编写）。
1.欢迎界面

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title><style>body{background-image: url("image/view1.jpg");background-size: cover;background-repeat: no-repeat;margin-top: 250px;text-align: center;font-size: 40px;font-family:STXingkai;}div{margin-top: 10px;}button{background-color: transparent;font-size: 40px;font-family:STXingkai;}</style><script>function insert(){window.location="view.php";}function search(){window.location="search.php";}function deleteview(){window.location="deleteview";}function edit(){window.location="updateview";}</script>
</head><body><h3>欢迎来到18软工的留言板</h3><button type="button" onClick="insert()">添加留言</button><button name="search" onClick="search()">查看留言</button><div class="change"><button name="delete" onClick="deleteview()">删除留言</button><button name="edit" onClick="edit()">修改留言</button></div></body>
</html>

2.添加留言的用户界面和数据库操作语句

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title><style>body{background-image:url("image/background.jpg");background-size: cover;background-repeat: no-repeat;font-size: 40px;font-family:STXingkai;}center{margin-top: 200px;}input{background-color: transparent;border-left-width:0px;border-right-width: 0px;border-top-width: 0px;font-size: 30px;font-family:STXingkai;}       textarea{background-color: transparent;border-left-width:0px;border-right-width: 0px;border-top-width: 0px;border-bottom-width: 0px;font-size: 30px;font-family:STXingkai;}button{background-color: transparent;font-size: 40px;font-family:STXingkai;}</style>
</head><body><center><h3>添加留言</h3><form action = "insert.php" method = "post"><table width = "auto" border = "0" cellpadding = "4"><tr><td  align = "right">标题：</td><td><input type = "text" name = "title" ></td></tr><tr><td  align = "right">留言者：</td><td><input type ="text" name = "name"></td></tr><tr><td align = "right" valign = "top">留言内容：</td><td><textarea name = "content" row = "5" cols = "30"></textarea></td></tr><tr><td align = "right" valign = "top">联系电话：</td><td><input type = "number" name = "phone"></td></tr><tr><td align = "right" valign = "top">联系邮箱：</td><td><input type ="text" name = "email"></td></tr><tr><td align = "right" valign = "top">QQ：</td><td><input type = "number" name = "qqnumber"></td></tr><tr><td colspan = "2" align = "center"><button type="submit">提交</button><button type="reset">重置</button></td></tr></table></form>
</center>
</body>
</html>

<?php //连接数据库$db=mysqli_connect("localhost","root","")or die("连接失败");mysqli_select_db($db,"lyb");mysqli_query($db,"set names utf8");//获取数据$title=$_POST["title"];$name=$_POST["name"];$content=$_POST["content"];if(!is_numeric($_POST["phone"])){echo "请输入正确的电话号码";}elseif(strlen($_POST["phone"])!=11){echo "请输入正确的号码";}else{$phone=$_POST["phone"];}$email=$_POST["email"];$qqnumber=$_POST["qqnumber"];//插入数据$sql="insert into software value('$title','$name','$content',$phone,'$email',$qqnumber)";$result=mysqli_query($db,$sql);if(!$result){printf("Error: %s", mysqli_error($db));}else{echo "成功两秒后跳转";header("refresh:2;url=login.php");mysqli_close($db);}?>

3.查询内容的用户界面和对应的数据库操作语句

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title><style>body{background-image:url("image/background.jpg");background-size: cover;background-repeat: no-repeat;margin-top: 250px;font-size: 35px;font-family:STXingkai;}input{background-color: transparent;border-left-width:0px;border-right-width: 0px;border-top-width: 0px;font-size: 40px;font-family:STXingkai;}button{float: right;background-color: transparent;font-size: 35px;font-family:STXingkai;}          </style><script>function returnview(){window.location="login.php";}</script>
</head><body><center><h3>我的留言板</h3><?php$db=mysqli_connect("localhost","root","");mysqli_select_db($db,"lyb");mysqli_query($db,"set names utf8");$sql="select * from software";$result=mysqli_query($db,$sql);echo "<table border=2 >";echo "<tr><th>标题</th><th>姓名</th><th>内容</th><th>电话</th><th>邮箱</th><th>QQ</th></tr>\n";while ($myrow=mysqli_fetch_row($result)){printf("<tr> <td>%s</td> <td>%s</td><td>%s</td><td>%s</td> <td>%s</td> <td>%s</td> </tr>", $myrow[0], $myrow[1], $myrow[2], $myrow[3],$myrow[4],$myrow[5]);}echo "</table>";mysqli_close($db);?></center><button type="submit" onClick="returnview()">返回</button>
</body>
</html>

4.删除的用户界面和对应的数据库操作语句

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title><style>body{background-image:url("image/background.jpg");background-size: cover;background-repeat: no-repeat;margin-top: 300px;font-size: 40px;font-family:STXingkai;}input{background-color: transparent;border-left-width:0px;border-right-width: 0px;border-top-width: 0px;font-size: 40px;font-family:STXingkai;}button{background-color: transparent;font-size: 40px;font-family:STXingkai;}</style>
</head><body><center><!删除留言板--><h3>删除留言板</h3><form action="delete.php" method="post"><tr>             <td  align="right">输入留言者姓名:</td><td><input type="text" name ="name"></td></tr><button type="submit">确定</button></form></center>
</body>
</html>

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title><style>body{font-size: 40px;font-family:STXingkai;}</style>
</head><body><?php$db=mysqli_connect("localhost","root","");mysqli_select_db($db,"lyb");mysqli_query($db,"set names utf8");$name=$_POST['name'];$sql="delete from software where name='$name'";$result=mysqli_query($db,$sql);if(!$result){echo mysql_error();exit();   }else{  echo "删除成功2秒后跳转";header("refresh:2;url=login.php");mysqli_close($db);}?>
</body>
</html>

5.修改留言的用户界面和对应的数据库操纵语句

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title><style>body{background-image:url("image/background.jpg");background-size: cover;background-repeat: no-repeat;margin-top: 300px;font-size: 40px;font-family:STXingkai;}input{background-color: transparent;border-left-width:0px;border-right-width: 0px;border-top-width: 0px;font-size: 40px;font-family:STXingkai;}button{background-color: transparent;font-size: 40px;font-family:STXingkai;}</style>
</head>
<body><center><!修改留言板--><h3>修改留言板</h3><form action="edit.php" method="post"><tr>                <td  align="right">输入留言者姓名:</td><td><input type="text" name ="name"></td></tr><button type="submit">确定</button></form></center>
</body>
</html>

<!doctype html>
<html>
<head>
<meta  charset="utf-8">
<title>无标题文档</title><style>body{background-image:url("image/background.jpg");background-size: cover;background-repeat: no-repeat;font-size: 40px;font-family:STXingkai;}center{margin-top: 200px;}input{background-color: transparent;border-left-width:0px;border-right-width: 0px;border-top-width: 0px;font-size: 30px;font-family:STXingkai;}       textarea{background-color: transparent;border-left-width:0px;border-right-width: 0px;border-top-width: 0px;border-bottom-width: 0px;font-size: 30px;font-family:STXingkai;}button{background-color: transparent;font-size: 40px;font-family:STXingkai;}</style>
</head><body><center><h2>修改留言板</h2><?php$db=mysqli_connect("localhost","root","");mysqli_select_db($db,"lyb");mysqli_query($db,"set names utf8");$name=$_POST['name'];$sql="select * from software where name='$name'";$res=mysqli_query($db,$sql);$arr=mysqli_fetch_assoc($res);?><form action = "update.php" method = "post"><table width = "auto" border = "0" cellpadding = "4"><tr><td  align = "right">标题：</td><td><input type = "text" name = "title" value="<?php echo $arr['title'] ?>" /></td></tr><tr><td  align = "right">留言者：</td><td><input type = "text" name = "name" value="<?php echo $arr['name'] ?>"/></td></tr><tr><td align = "right" valign = "top">留言内容：</td><td><textarea name = "content" row = "5" cols = "30" ><?php echo $arr['content'] ?></textarea></td></tr><tr><td align = "right" valign = "top">联系电话：</td><td><input type = "number" name = "phone" value="<?php echo $arr['phone'] ?>"/></td></tr><tr><td align = "right" valign = "top">联系邮箱：</td><td><input type = "text" name = "email" value="<?php echo $arr['email'] ?>"/></td></tr><tr><td align = "right" valign = "top">QQ：</td><td><input type = "number" name = "qqnumber" value="<?php echo $arr['qqnumber'] ?>"/></td></tr><tr><td colspan = "2" align = "center"><button type="submit">修改留言</button><button type="reset">重置</button></td></tr></table></form></center>
</body>
</html>

<!doctype html>
<html>
<head>
<meta  charset="utf-8">
<title>无标题文档</title><style>body{font-size: 40px;font-family:STXingkai;}</style>
</head><body><?php$db=mysqli_connect("localhost","root","");mysqli_select_db($db,"lyb");mysqli_query($db,"set names utf8");//获取数据$title=$_POST["title"];$name=$_POST["name"];$content=$_POST["content"];if(!is_numeric($_POST["phone"])){echo "请输入正确的电话号码";}elseif(strlen($_POST["phone"])!=11){echo "请输入正确的号码";}else{$phone=$_POST["phone"];}$email=$_POST["email"];$qqnumber=$_POST["qqnumber"];//更新数据库数据$sql="update software set title='$title',name='$name',content='$content',phone=$phone,email='$email',qqnumber=$qqnumber where name='$name'";$result=mysqli_query($db,$sql);if(!$result){printf("Error: %s", mysqli_error($db));}else{echo "成功两秒后跳转";header("refresh:2;url=login.php");mysqli_close($db);}?>
</body>
</html>

效果图：

个别界面含有隐私内容这里就不贴出来了，下面是编写留言板时使用的数据库大家可自行下载：

链接：https://pan.baidu.com/s/11wNtBj2PhHyZPlkurcTF7g
提取码：usz3

总结：
总的来说php语言是较简单的计算机语言，在连接数据库方面也是很直接的连接方式。需要注意的是在较新版本的php当中连接数据库以及操作数据库用的较多的是sqli语句该语句与旧版的语句是存在不同的。

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PHP简单同学录（连接数据库）

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