深入分析使用mysql_fetch_object()以对象的形式返回查询结果
本篇文章是对使用mysql_fetch_object()以对象的形式返回查询结果进行了详细的分析介绍,需要的朋友参考下
mysql_fetch_object()同样用于获取查询数据结果集,香港虚拟主机,返回当前行数据,并自动滑向下一行。但与mysql_fetch_row()和mysql_fetch_array()不同的是,网站空间,它返回的是一个对象,这个对象的属性集合即为数据的属性集合,而属性上的值则为数据库中当前行该属性上的值。函数定义如下。
复制代码 代码如下:
object mysql_fetch_object( int result, int [result_type])
参数说明同mysql_fetch_array()。
返回值如下。
成功:一个对象,该对象的属性名对应于结果集中的属性名,属性的值就是结果集中对应的属性值。
失败:false。
下面是使用mysql_fetch_object()的示例:查询数据表Computers中的图书信息。
复制代码 代码如下:
1
2 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."
";
10
$result=mysql_query($query,$connection);
11
//mysql_fetch_object()获得数据,并输出
12
while($row=mysql_fetch_object($result))
13
{
14
echo "书名: ".$row->name."
";
15
echo "价格: ".$row->price."
";
16
echo "出版日期: ".$row->publish_date."
";
17
echo "
";
18
}
19 ?>
示例在第12行使用mysql_fetch_object()获取当前行的数据,并通过12~18行的循环将之输出。在输出过程中,通过对象运算符“->”获得该行数据在其属性上的值。
示例运行的结果如下。
复制代码 代码如下:
书名: 数据结构
价格: 20
出版日期: 2001-01-01
书名: C语言
价格: 23
出版日期: 1998-04-04
书名: PHP入门技术
价格: 22
出版日期: 2005-05-01
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