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PHP连接数据库(注冊页面的增删改查)

2017-07-11 09:12 441 查看

1.连接数据库

—————————–connect.php——————————————–

<?php
//本地測试
$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.注冊页面(html页面)
———————————-reg_9.php—————————————

<!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>注冊页面</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=""/>以小写字母開始,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'>个人简单介绍</td>
<td>
<textarea name="txt" id="" cols="50" rows="10"></textarea>
</td>
</tr>
<tr>
<td colspan='2'><input type="submit" name='act' value='注冊' /></td>
</tr>
</table>
</form>

</body>
</html>

3.将注冊数据显示在数据库

—————————————-add.php—————————————–
//往数据库中加入数据

<?

php header("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
———————————-hello.php———————————————

<?php
header("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]'>改动</a>&nbsp;&nbsp;&nbsp;&nbsp;<a href='delete.php?

id=$value[id]'>删除</a></td>"; echo "<tr/>"; echo "</table>"; } ?>

4.改动数据
—————————————–update1.php———————————–
//当用户要改动信息时,返回页面,页面中包括之前填写的信息

<!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;(显示出改动哪一行) $result=mysql_query($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>注冊页面</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']?>"/>以小写字母開始,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'>个人简单介绍</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='改动' /></td> </tr> </table> </form> </div> </body> </html>

————————————–update.php————————————–
//将改动的信息存入数据库

<?

php header("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('改动成功')"; }else{ header("Location:update1.php?id=".$data['id']); //echo "alert('改动失败')"; } ?>

5.删除数据
—————————–delete.php———————————————
//删除数据库里的数据

<?php
header("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。会自己主动跳转到后台页面,数据库里数据也删除

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