PHP mysql_field_seek() 函数
PHP MySQL 函数
定义和用法
mysql_field_seek() 函数将结果集中的指针设定为指定的字段偏移量。
如果成功，则返回 true，如果失败，则返回 false。
语法
mysql_field_seek(data,field_offset)
| 参数 | 描述 |
|---|---|
| data | 必需。要使用的数据指针。该数据指针是从 mysql_query() 返回的结果。 |
| field_offset | 必需。指示从哪个字段开始返回。0 指示第一个字段。 |
例子
<?php
$con = mysql_connect("localhost", "hello", "321");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
$db_selected = mysql_select_db("test_db",$con);
$sql = "SELECT * from Person";
$result = mysql_query($sql,$con);
// 跳到第四个字段
mysql_field_seek($result,3);
print_r(mysql_fetch_field($result));
mysql_close($con);
?>
$con = mysql_connect("localhost", "hello", "321");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
$db_selected = mysql_select_db("test_db",$con);
$sql = "SELECT * from Person";
$result = mysql_query($sql,$con);
// 跳到第四个字段
mysql_field_seek($result,3);
print_r(mysql_fetch_field($result));
mysql_close($con);
?>
输出：
stdClass Object
(
[name] => Age
[table] => Person
[def] =>
[max_length] => 2
[not_null] => 0
[primary_key] => 0
[multiple_key] => 0
[unique_key] => 0
[numeric] => 1
[blob] => 0
[type] => int
[unsigned] => 0
[zerofill] => 0
)
(
[name] => Age
[table] => Person
[def] =>
[max_length] => 2
[not_null] => 0
[primary_key] => 0
[multiple_key] => 0
[unique_key] => 0
[numeric] => 1
[blob] => 0
[type] => int
[unsigned] => 0
[zerofill] => 0
)
PHP MySQL 函数