PHP连接数据库实现注册页面的增删改查操作

2019-11-21 22:16:03

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本文实例为大家分享了PHP连接数据库实现注册页面的增删改查操作的方法，供大家参考，具体内容如下

1.连接数据库

<?php //本地测试 $host = '127.0.0.1'; $port = 3306; $user = "root"; $pwd = ""; $link = @mysql_connect("{$host}:{$port}",$user,$pwd,true); if(!$link) {  die("Connect Server Failed: " . mysql_error()); } //选择连接的数据库库名 mysql_select_db("my"); //设置字符编码utf8 mysql_set_charset('utf8');?>

2.注册页面（html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" xml:lang="en"><head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" /> <title>Document</title></head><body><h3>注册页面</h3> <form action="add.php" method='post'>  <table border='1' cellpadding='0' cellspacing='0' width='80%' bgcolor='#ABCDEF'>   <tr>    <td align='right'>用户名</td>    <td><input type="text" name="username" id=""/>以小写字母开始，长度要求5~10</td>   </tr>   <tr>    <td align='right'>密码</td>    <td><input type="password" name="password" id=""/>密码不能为空</td>   </tr>   <tr>    <td align='right'>邮箱</td>    <td><input type="text" name="email" id="" /></td>   </tr>   <tr>    <td align='right'>性别</td>    <td>     <input type="radio" name="sex" id="" value='1' />男     <input type="radio" name="sex" id="" value='2' />女     <input type="radio" name="sex" id="" value='3' />保密    </td>   </tr>   <tr>    <td align='right'>个人简介</td>    <td>     <textarea name="txt" id="" cols="50" rows="10"></textarea>    </td>   </tr>   <tr>    <td colspan='2'><input type="submit" name='act' value='注册' /></td>   </tr>  </table> </form></body></html>

3.将注册数据显示在数据库

//往数据库中添加数据<?phpheader("Content-type:text/html; charset=utf-8");//-----------------------连接数据库---------------------------include_once "connect.php";//-------------------------将数据连接到数据库------------------$time=time();$sql="insert into user (username,password,email,sex,txt,`time`) value('{$_POST['username']}','{$_POST['password']}','{$_POST['email']}','{$_POST['sex']}','{$_POST['txt']}','{$time}')";$res=mysql_query($sql);header("location:hello.php");?>

4.返回后台界面

<?phpheader("Content-type:text/html; charset=utf-8");//-----------------------连接数据库------------------------------include_once "connect.php";//--------------------查询数据库--------------------------------$query="select * from user";$result=mysql_query($query);if(!$result){ die("could not to the database<br/>".mysql_error());}//-------------------封装函数-----------------------------//该函数将数据库的数据写成数组形式function result2Arr($result){ while($result_row=mysql_fetch_assoc($result)){  $arr[] = $result_row; } return $arr;}$arr = result2Arr($result);foreach($arr as $key=>$value){ echo "<table border='1px'>"; echo "<table border='1px' >"; echo "<tr> "; echo "<td width='100px'>".$value['id']."</td>"; echo "<td width='100px'>".$value['username']."</td>"; echo "<td width='100px'>".$value['password']."</td>"; echo "<td width='200px'>".$value['email']."</td>"; echo "<td width='100px'>".$value['sex']."</td>"; echo "<td width='100px'>".$value['txt']."</td>"; echo "<td width='100px'>".date('Y-m-d H:i:s',$value['time'])."</td>"; echo "<td width='100px'><a href='update1.php?id=$value[id]'>修改</a>    <a href='delete.php?id=$value[id]'>删除</a></td>"; echo "<tr/>"; echo "</table>";}?>

5.修改数据

//当用户要修改信息时，返回页面，页面中包含之前填写的信息<!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" xml:lang="en"><head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" /> <title>Document</title></head><body><div><?php include_once "connect.php"; $sql="select * from user where id='".$_GET['id']."'"; //echo "sql:".$sql;(显示出修改哪一行) $result=mysql_query($sql,$link); $arr = result2Arr($result); //print_r($arr); $row = $arr[0];function result2Arr($result){ while($result_row=mysql_fetch_assoc($result)){  $arr[] = $result_row; } return $arr;}?>  <h3>注册页面</h3>  <form action="update.php" method='post'>   <input type="hidden" name="id" id="" value="<?php echo $row['id']?>"/>   <table border='1' cellpadding='0' cellspacing='0' width='80%' bgcolor='#ABCDEF'>    <tr>     <td align='right'>用户名</td>     <td><input type="text" name="username" id="" value="<?php echo $row['username']?>"/>以小写字母开始，长度要求5~10</td>    </tr>    <tr>     <td align='right'>密码</td>     <td><input type="password" name="password" id=""value="<?php echo $row['password']?>"/>密码不能为空</td>    </tr>    <tr>     <td align='right'>邮箱</td>     <td><input type="text" name="email" id="" value="<?php echo $row['email']?>"/></td>    </tr>    <tr>     <td align='right'>性别</td>     <td>      <input type="radio" name="sex" id="" value='1' <?php if($row['sex']=='1'){ echo 'checked';}?>/>男      <input type="radio" name="sex" id="" value='2' <?php if($row['sex']=='2'){ echo 'checked';}?>/>女      <input type="radio" name="sex" id="" value='3' <?php if($row['sex']=='3'){ echo 'checked';}?>/>保密     </td>    </tr>    <tr>     <td align='right'>个人简介</td>     <td>      <textarea name="txt" id="" cols="50" rows="10"><?php echo $row['txt']?></textarea>     </td>    </tr>    <tr>     <td colspan='2'><input type="submit" name='act' value='修改' /></td>    </tr>   </table>  </form></div></body></html>

//将修改的信息存入数据库<?phpheader("Content-type:text/html; charset=utf-8");//通过post获取页面提交数据信息$data = $_POST;//print_r($data);include_once "connect.php";$sql = "update `user` set username='{$data['username']}',password='{$data['password']}', email='{$data['email']}',sex='{$data['sex']}',txt='{$data['txt']}' where id='{$data['id']}'";echo $sql;$res = mysql_query($sql,$link);if($res){ header("Location:hello.php"); //echo "alert('修改成功')";}else{ header("Location:update1.php?id=".$data['id']); //echo "alert('修改失败')";}?>

6.删除数据

//删除数据库里的数据<?phpheader("Content-type:text/html; charset=utf-8");include_once 'connect.php';$sql = "delete from user where id='".$_GET['id']."'";$sus=mysql_query($sql,$link);if($sus){ header("location:hello.php");}else{ echo "alert('删除失败')";}?>//若要删除李四，点击删除后，会自动跳转到后台页面，数据库里数据也删除