PDOStatement::fetchSingle
(no version information, might be only in CVS)
PDOStatement::fetchSingle --
Returns the first column in the next row of a result set
说明
string
PDOStatement::fetchSingle ( void )
| 警告 |
本函数是实验性的。本函数的行为，包括函数名称以及其它任何关于本函数的文档可能会在没有通知的情况下随
PHP 以后的发布而改变。使用本函数风险自担。 |
返回值
PDOStatement::fetchSingle() returns the first column
in the next row of a result set as a string value.
| 警告 |
There is no way to return the second or subsequent columns from a row
if you use this method to retrieve data.
|
例
例子 1. Return first column of the next row
<?php
$sth = $dbh->prepare("SELECT name, colour FROM fruit");
$sth->execute();
/* Fetch the first column from the next row in the result set */
print("Fetch the first column from the next row in the result set:\n");
$result = $sth->fetchSingle();
print("$result\n");
$result = $sth->fetchSingle();
print("$result\n");
?>
|
上例将输出： Fetch the first column from the next row in the result set:
lemon
orange |
|
参见
| PDO::query() |
| PDOStatement::fetch() |
| PDOStatement::fetchAll() |
| PDOStatement::prepare() |
| PDOStatement::setFetchMode() |