php +mysql mysql_fetch_lengths tutorial_PHP tutorial

The function of mysql_fetch_lengths is to determine the length of mysql_fetch_array ( ), mysql_fetch_assoc ( ), mysql_fetch_object ( ) or mysql_fetch_row ( ). If successful, return a display, otherwise return false;

Syntax of mysql_fetch_lengths.

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
)

http://www.bkjia.com/PHPjc/630896.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/630896.htmlTechArticleThe function of mysql_fetch_lengths is to determine mysql_fetch_array (), mysql_fetch_assoc (), mysql_fetch_object () or mysql_fetch_row ( ) length, if Return one if successful...