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 <"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
<"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 <"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".$data['id']); //echo "alert('修改失败')"; } ?>
6.删除数据
//删除数据库里的数据 <"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
以上就是本文的全部内容，希望对大家的学习有所帮助。
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