Pdo\Pgsql::getNotify
(PHP 8 >= 8.4.0)
Pdo\Pgsql::getNotify — Get asynchronous notification
说明
$fetchMode = PDO::FETCH_DEFAULT, int $timeoutMilliseconds = 0): array|falseReturns a result set representing a pending asynchronous notification.
参数
fetchMode-
The format the result set should be returned as, one of the following constants:
timeoutMilliseconds- The length of time to wait for a response, in milliseconds.
返回值
If one or more notifications is pending, returns a single row,
with fields message and pid,
otherwise returns false.
错误／异常
A ValueError is thrown if
fetchMode is not one of the valid
PDO::FETCH_*
constants.
A ValueError is thrown if
timeoutMilliseconds is less than 0.
A E_WARNING is raised when
timeoutMilliseconds is greater than the value
that can be contained in a signed 32-bit integer, in which case it will be
the maximum value of a signed 32-bit integer.
参见
- PDO::query() - 预处理并执行没有占位符的 SQL 语句
- PDOStatement::fetch() - 从结果集中获取下一行
- PDOStatement::fetchAll() - 从结果集中获取剩余的行