PHP的数据库增删改查源代码

2024-05-04 23:00:17

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//mysql数据库的sql

create table user( id int(5) default '0' not null auto_increment, name varchar(20), city varchar(20), postcode varchar(10),address varchar(100), password varchar(10), level tinyint(2) default '0',right tinyint(2),email varchar(40), primary key (id), unique id (id));
insert into myuser values (1,'王友','北京','100083','北京市海淀区学院路',111,0,0,'[email protected]');
insert into myuser values (2,'金风','武汉','430071','武汉市武昌区水果湖',111,0,0,'[email protected]');
insert into myuser values (3,'常丽','襄樊','441021','襄樊市襄城区南街',111,0,0,'[email protected]');

1.查寻全部

<html>

<head>
<title> 查寻全部</title>
</head>

<body>

<h2 align=center>
下面是用户数据库的所有内容：
</h2>

<?
   $db = mysql_connect("localhost", "root");
   mysql_select_db("mysite",$db);
   $result = mysql_query("select * from user",$db);

   echo "<table border=1>/n";
   echo "<tr><td>id</td><td>姓名</td>";
   echo "<td>城市</td><td>邮编</td>";
   echo "<td>住    址</td><td>等级</td>";
   echo "<td>权限</td><td>邮件地址</td>";
   echo "</tr>/n";

while ($myrow = mysql_fetch_row($result))
   {
      printf("<tr><td>%s</td><td>%s</td>", $myrow[0], $myrow[1]);
     printf("<td>%s</td><td>%s</td>", $myrow[2], $myrow[3]);
     printf("<td>%s</td><td>%s</td>", $myrow[4], $myrow[6]);
     printf("<td>%s</td><td>%s</td></tr>/n", $myrow[7], $myrow[8]);
   }
echo "</table>/n";
?>

</body>
</html>

2.根据id查询

<html>

<body>

<title>
     根据id查询
</title>

<?
$db = mysql_connect("localhost", "root");
mysql_select_db("mysite",$db);

if ($id) {
   $result = mysql_query("select * from user where id=$id",$db);
   $myrow = mysql_fetch_array($result);

   printf("<h2 align=left>用户的情况</h2>");
   printf("1.id号 %s/n<br>", $myrow["id"]);
   printf("2.姓名: %s/n<br>", $myrow["name"]);
   printf("3.城市: %s/n<br>", $myrow["city"]);
   printf("4.邮编: %s/n<br>", $myrow["postcode"]);
   printf("5.住址: %s/n<br>", $myrow["address"]);
   printf("6.等级：%s/n<br>", $myrow["level"]);
   printf("7.邮件地址: %s/n<br>", $myrow["email"]);
   printf("<a href=/"%s/"> 继续查询 </a>", $path_info);

}
else
{

   $result = mysql_query("select * from user",$db);
    if ($myrow = mysql_fetch_array($result))
    {
      printf("<h2 align=left>请选择要查询的用户：</h2>");
      do {
        printf("%s<a href=/"%s?id=%s/">%s </a><br>/n",
        $myrow["id"],$path_info,$myrow["id"], $myrow["name"]);
          }
      while ($myrow = mysql_fetch_array($result));
    }
    else
    {
      echo "对不起，没有数据！";
    }
}
?>

</body>

</html>

3.更新

<html>

<body>

<title>
     更新
</title>


<?
//php程序的开始
$db = mysql_connect("localhost", "root");
mysql_select_db("mysite",$db);

if (!$id)
{

   $result = mysql_query("select * from user",$db);
    if ($myrow = mysql_fetch_array($result))
    {
      printf("<h2 align=left>请选择要修改的用户名字：</h2>");
      do {
        printf("%s<a href=/"%s?id=%s/">%s </a><br>/n",
        $myrow["id"],$path_info,$myrow["id"], $myrow["name"]);
          }
      while ($myrow = mysql_fetch_array($result));
    }
    else
    {
      echo "对不起！数据库中没有记录";
    }
}
else
{
if ($submit)
   {
    $sql = "update user set name='$name',city='$city',
    address='$address',email='$email' where id=$id";
    $result = mysql_query($sql);
    echo "谢谢！数据更改完成/n";
   }
else
   {
    $sql = "select * from user where id=$id";
    $result = mysql_query($sql);
    $myrow = mysql_fetch_array($result);
//以下不是php的部分
?>
    <h2 align=left>请对用户的信息进行修改：</h2>
    <form method="post" action="<? echo $path_info ?>">
    <input type=hidden name="id"
    value="<?php echo $myrow["id"] ?>">
    姓名：<input type="text" name="first" value="<?php
   echo $myrow["name"] ?>"><br>
    城市：<input type="text" name="city" value="<?php echo
    $myrow["city"] ?>"><br>
    住址：<input type="text" name="address" value="<?php echo
    $myrow["address"] ?>"><br>
     电子邮件：<input type="text" name="email" value="<?php echo
    $myrow["email"] ?>"><br>
     <input type="submit" name="submit" value="修改完毕">
    </form>
<?
//php 的结束
65：}
}
?>
</body>
</html>

4.增加删除记录

<html>

<body>
<title>
   增加删除记录
</title>

<?
$db = mysql_connect("localhost", "root");
mysql_select_db("mysite",$db);
                          &nb, sp;
if ($submit)
   {
    $sql = "insert into myuser (name,city,address,email)
    values ('$name','$city','$address','$email')";
    $result = mysql_query($sql);
     echo "记录添加成功！<p>";
   }
else
   if ($delete)
     {
      // 删除一条记录
      $sql = "delete from myuser where id=$id";
      $result = mysql_query($sql);
      echo "记录删除成功！<p>";
     }
   else
     {
    printf("<h2 align=left>删除一个用户的所有信息：</h2>");
    $result = mysql_query("select * from myuser",$db);
    while ($myrow = mysql_fetch_array($result))
       {
          printf("%s:<a href=/"%s?id=%s&delete=yes/">%s</a> <br>/n",
          $myrow["id"],$path_info, $myrow["id"], $myrow["name"]);
       }
?>

<p>

<h2 align=left>
      添加一个新的用户：
</h2>

<form method="post" action="<?php echo $path_info?>">
姓名：<input type="text" name="name" value="<?php
   echo $myrow["name"] ?>"><br>
    城市：<input type="text" name="city" value="<?php echo
    $myrow["city"] ?>"><br>
    住址：<input type="text" name="address" value="<?php echo
    $myrow["address"] ?>"><br>
     电子邮件：<input type="text" name="email" value="<?php echo
    $myrow["email"] ?>"><br>
    <input type="submit" name="submit" value="添加用户">
    </form>

<?php
}
?>

</body>

</html>