Home >php教程 >php手册 >php +mysql mysql_fetch_lengths 教程

php +mysql mysql_fetch_lengths 教程

WBOY
WBOYOriginal
2016-06-13 10:07:14942browse

mysql_fetch_lengths 的作用是判断mysql_fetch_array ( ) , mysql_fetch_assoc ( ) , mysql_fetch_object ( )或mysql_fetch_row ( )的长度,如果成功就返回一个陈列,否则就返回false;

mysql_fetch_lengths的语法.

mysql_fetch_lengths(data)
参数.
data:必选就是mysql_query返回的值
来我们来看看实例.

$sql = "SELECT * from Person WHERE Lastname='Refsnes'";
$result = mysql_query($sql,$con);
print_r(mysql_fetch_row($result));
print_r(mysql_fetch_lengths($result));
?>
输出结果.
<pre class="brush:php;toolbar:false">Array
(
[0] => Refsnes
[1] => Kai Jim
[2] => Taugata 2
[3] => 22
)
Array
(
[0] => 7
[1] => 7
[2] => 9
[3] => 2
)
Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn