PHP+MySQL：测试连接+基本DB操作

PHP使用MySQL，从连接、创建、到结果显示

 <?php
     //连接MySQL测试
     $db = mysql_connect("localhost","root","wenwen");
     if (!$db)
     {
           die('Could not connect: ' . mysql_error());
     }
     else
     {
         echo "connect success!";
     }

     //创建数据库
     if (!mysql_query("CREATE DATABASE my_db",$db))
     {
         echo "Error creating database: " . mysql_error();
     }

     //选择数据库
     mysql_select_db("my_db", $db);

     //创建表
     $sql = "CREATE TABLE Persons
     (
         FirstName varchar(15),
         LastName varchar(15),
         Age int
     )";
     mysql_query($sql,$db);

     //插入数据
     mysql_query("INSERT INTO Persons (FirstName, LastName, Age)
     VALUES ('Jordan', 'Michael', '51')");
     mysql_query("INSERT INTO Persons (FirstName, LastName, Age)
     VALUES ('Bryant', 'Kobe', '36')");

     //创建结果集
     $sql = "SELECT * FROM Persons";
     $result = mysql_query($sql); 

     //在 HTML 表格中显示结果
     echo "<table border='1'>
     <tr>
     <th>FirstName</th>
     <th>LastName</th>
     <th>Age</th>
     </tr>";

     while($rs = mysql_fetch_array($result))
     {
         echo "<tr>";
         echo "<td>" . $rs['FirstName'] . "</td>";
         echo "<td>" . $rs['LastName'] . "</td>";
             echo "<td>" . $rs['Age'] . "</td>";
         echo "</tr>";
     }
     echo "</table>";

     //关闭连接
     mysql_close($db);
 ?>

运行效果

DB中的变化