PHP的数据库增删改查源代码

php中文网

发布时间：2016-06-21 09:05:11

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来源于php中文网

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数据|数据库|源代码

//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,'wangyou000@263.net');
INSERT INTO myuser VALUES (2,'金风','武汉','430071','武汉市武昌区水果湖',111,0,0,'jinfeng000@263.net');
INSERT INTO myuser VALUES (3,'常丽','襄樊','441021','襄樊市襄城区南街',111,0,0,'changli000@263.net');

1.查寻全部

查寻全部

下面是用户数据库的所有内容：

   $db = MySQL_connect("localhost", "root");
   MySQL_select_db("mysite",$db);
   $result = MySQL_query("SELECT * FROM user",$db);

   echo "\n";
   echo "";
   echo "";
   echo "";
   echo "";
   echo "\n";

while ($myrow = MySQL_fetch_row($result))
   {
      printf("", $myrow[0], $myrow[1]);
     printf("", $myrow[2], $myrow[3]);
     printf("", $myrow[4], $myrow[6]);
     printf("\n", $myrow[7], $myrow[8]);
   }
echo "

id	姓名	城市	邮编	住址	等级	权限	邮件地址
%s	%s	%s	%s	%s	%s	%s	%s

\n";
?>

2.根据id查询

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根据id查询 


$db = MySQL_connect("localhost", "root");
MySQL_select_db("mysite",$db);

if ($id) {
 $result = MySQL_query("SELECT * FROM user WHERE id=$id",$db);
 $myrow = MySQL_fetch_array($result);

 printf("

用户的情况

");
   printf("1.ID号 %s\n
", $myrow["id"]);
   printf("2.姓名: %s\n
", $myrow["name"]);
   printf("3.城市: %s\n
", $myrow["city"]);
   printf("4.邮编: %s\n
", $myrow["postcode"]);
   printf("5.住址: %s\n
", $myrow["address"]);
   printf("6.等级：%s\n
", $myrow["level"]);
   printf("7.邮件地址: %s\n
", $myrow["email"]);
   printf(" 继续查询 ", $PATH_INFO);

}
else
{

   $result = MySQL_query("SELECT * FROM user",$db);
    if ($myrow = MySQL_fetch_array($result))
    {
      printf("

请选择要查询的用户：

");
      do {
        printf("%s%s
\n",
        $myrow["id"],$PATH_INFO,$myrow["id"], $myrow["name"]);
          }
      while ($myrow = MySQL_fetch_array($result));
    }
    else
    {
      echo "对不起，没有数据！";
    }
}
?>

3.更新

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更新 



//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("

请选择要修改的用户名字：

");
      do {
        printf("%s%s
\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
?>

请对用户的信息进行修改：

//PHP 的结束
65：}
}
?>

4.增加删除记录

增加删除记录 


$db = MySQL_connect("localhost", "root");
MySQL_select_db("mysite",$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！

";
   }
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！

";
     }
   else
     {
    printf("

删除一个用户的所有信息：

");
    $result = MySQL_query("SELECT * FROM myuser",$db);
    while ($myrow = MySQL_fetch_array($result))
       {
          printf("%s:%s
\n",
          $myrow["id"],$PATH_INFO, $myrow["id"], $myrow["name"]);
       }
?>