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