PHP: 使用mysql_fetch_array()来获取数据

1    <!----使用mysql_fetch_array()来获取数据：mysql_fetch_array.php---->
2    <?php
3        //连接并选择到数据库服务器
4        $connection = mysql_connect ("localhost", "root", "password");
5        mysql_select_db("Books", $connection);
6        //查询数据
7        $query="SELECT * FROM Computers ";
8        $query.="WHERE price >= 20";
9        //echo $query."<br>";
10       $result=mysql_query($query,$connection);
11       //mysql_fetch_array()获得数据，并输出
12       while($row=mysql_fetch_array($result))
13       {
14            echo "书名：    ".$row[1]."<br>";
15            echo "价格：    ".$row["price"]."<br>";
16            echo "出版日期：    ".$row["publish_date"]."<br>";
17            echo "<br>";
18       }
19   ?>