PHP使用MySQL数据库

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

//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 (‘Peter‘, ‘Griffin‘, ‘35‘)");
mysql_query("INSERT INTO Persons (FirstName, LastName, Age) 
VALUES (‘Glenn‘, ‘Quagmire‘, ‘33‘)");

//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);
?>