Oracle 5.0, Справочное руководство

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Mysqlnd user handler plugin (
mysqlnd_uh
)
2711
mysqlnd_uh will be called. The functions installed by PECL/mysqlnd_uh are the methods of the built-in
classes.
The built-in PHP classes and their methods do nothing but call their
mysqlnd
C library counterparts, to
behave exactly like the original
mysqlnd
function they replace. The code below illustrates in pseudo-
code what the extension does.
Example 20.330. Pseudo-code: what a built-in class does
class MysqlndUhConnection {
public function connect(($conn, $host, $user, $passwd, $db, $port, $socket, $mysql_flags) {
MYSQLND* c_mysqlnd_connection = convert_from_php_to_c($conn);
...
return call_c_function(mysqlnd_conn__connect(c_mysqlnd_connection, ...));
}
}
The build-in classes behave like a transparent proxy. It is possible for you to replace the proxy with
your own. This is done by subclassing
MysqlndUhConnection
or
MysqlndUhPreparedStatement
to extend the functionality of the proxy, followed by registering a new proxy object. Proxy objects are
installed by
mysqlnd_uh_set_connection_proxy
and
mysqlnd_uh_set_statement_proxy
.
Example 20.331. Installing a proxy
<?php
class proxy extends MysqlndUhConnection {
public function connect($res, $host, $user, $passwd, $db, $port, $socket, $mysql_flags) {
printf("%s(%s)\n", __METHOD__, var_export(func_get_args(), true));
$ret = parent::connect($res, $host, $user, $passwd, $db, $port, $socket, $mysql_flags);
printf("%s returns %s\n", __METHOD__, var_export($ret, true));
return $ret;
}
}
mysqlnd_uh_set_connection_proxy(new proxy());
$mysqli = new mysqli("localhost", "root", "", "test");
?>
The above example will output:
proxy::connect(array (
0 => NULL,
1 => 'localhost',
2 => 'root',
3 => '',
4 => 'test',
5 => 3306,
6 => NULL,
7 => 131072,
))
proxy::connect returns true
20.7.8.4.3. Installing a proxy
Copyright 1997-2012 the PHP Documentation Group. [2230]
The extension provides two built-in classes:
MysqlndUhConnection
and
MysqlndUhPreparedStatement
. The classes are used for hooking
mysqlnd
library calls. Their
methods correspond to
mysqlnd
internal functions. By default they act like a transparent proxy and do