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- 数据库扩展
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- MySQL
- mysqlnd_uh
- MysqlndUhConnection
MysqlndUhConnection::close
(PECL mysqlnd-uh >= 1.0.0-alpha)
MysqlndUhConnection::close — Closes a previously opened database connection
说明
public MysqlndUhConnection::close ( mysqlnd_connection$connection
, int $close_type
) : bool
Closes a previously opened database connection.
Note:
Failing to call the parent implementation may cause memory leaks or crash PHP. This is not considered a bug. Please, keep in mind that the mysqlnd library functions have never been designed to be exposed to the user space.
参数
-
connection -
The connection to be closed. Do not modify!
-
close_type -
Why the connection is to be closed. The value of
close_typeis one ofMYSQLND_UH_MYSQLND_CLOSE_EXPLICIT,MYSQLND_UH_MYSQLND_CLOSE_IMPLICIT,MYSQLND_UH_MYSQLND_CLOSE_DISCONNECTEDorMYSQLND_UH_MYSQLND_CLOSE_LAST. The latter should never be seen, unless the default behaviour of the mysqlnd library has been changed by a plugin.
返回值
Returns TRUE on success.
Otherwise, returns FALSE
范例
Example #1 MysqlndUhConnection::close() example
<?php
function close_type_to_string($close_type) {
$mapping = array(
MYSQLND_UH_MYSQLND_CLOSE_DISCONNECTED => "MYSQLND_UH_MYSQLND_CLOSE_DISCONNECTED",
MYSQLND_UH_MYSQLND_CLOSE_EXPLICIT => "MYSQLND_UH_MYSQLND_CLOSE_EXPLICIT",
MYSQLND_UH_MYSQLND_CLOSE_IMPLICIT => "MYSQLND_UH_MYSQLND_CLOSE_IMPLICIT",
MYSQLND_UH_MYSQLND_CLOSE_LAST => "MYSQLND_UH_MYSQLND_CLOSE_IMPLICIT"
);
return (isset($mapping[$close_type])) ? $mapping[$close_type] : 'unknown';
}
class proxy extends MysqlndUhConnection {
public function close($res, $close_type) {
printf("%s(%s)\n", __METHOD__, var_export(func_get_args(), true));
printf("close_type = %s\n", close_type_to_string($close_type));
/* WARNING: you must call the parent */
$ret = parent::close($res, $close_type);
printf("%s returns %s\n", __METHOD__, var_export($ret, true));
return $ret;
}
}
mysqlnd_uh_set_connection_proxy(new proxy());
$mysqli = new mysqli("localhost", "root", "", "test");
$mysqli->close();
?>
以上例程会输出：
proxy::close(array ( 0 => NULL, 1 => 0, )) close_type = MYSQLND_UH_MYSQLND_CLOSE_EXPLICIT proxy::close returns true
参见
- mysqlnd_uh_set_connection_proxy() - Installs a proxy for mysqlnd connections
- mysqli_close() - 关闭先前打开的数据库连接
- mysql_close() - 关闭 MySQL 连接
User Contributed Notes
There are no user contributed notes for this page.官方地址：https://www.php.net/manual/en/mysqlnduhconnection.close.php