mysqlnd_memcache_setAssociate a MySQL connection with a Memcache connection
&reftitle.description;
boolmysqlnd_memcache_setmixedmysql_connectionMemcachedmemcache_connectionstringpatterncallablecallback
Associate mysql_connection with
memcache_connection using pattern
as a PCRE regular expression, and callback as a notification
callback or to unset the association of mysql_connection.
While associating a MySQL connection with a Memcache connection, this function
will query the MySQL Server for its configuration. It will automatically
detect whether the server is configured to use the InnoDB Memcache Daemon
Plugin or MySQL Cluster NDB Memcache support. It will also query the server
to automatically identify exported tables and other configuration options.
The results of this automatic configuration can be retrieved using
mysqlnd_memcache_get_config.
&reftitle.parameters;
mysql_connection
A handle to a MySQL Server using one of the MySQL API extensions for PHP, which are
PDO_MYSQL, mysqli or
ext/mysql.
memcache_connection
A Memcached instance with a
connection to the MySQL Memcache Daemon plugin. If this parameter
is omitted, then mysql_connection will be unassociated
from any memcache connection. And if a previous association exists, then it will be
replaced.
pattern
A regular expression in Perl Compatible
Regular Expression syntax used to identify potential
Memcache-queries. The query should have three sub patterns. The
first subpattern contains the requested field list, the second the name
of the ID column from the query and the third the requested value. If
this parameter is omitted or os set to &null;, then a default
pattern will be used.
callback
A callback which will be used whenever a query is being sent to
MySQL. The callback will receive a single &boolean; parameter
telling if a query was sent via Memcache.
&reftitle.returnvalues;
&true; if the association or disassociation is successful, otherwise &false; if there
is an error.
&reftitle.examples;
<function>mysqlnd_memcache_set</function> example with
<function>var_dump</function> as a simple debugging callback.
addServer("host", 11211);
mysqlnd_memcache_set($mysqli, $memc, NULL, 'var_dump');
/* This query will be intercepted and executed via Memcache protocol */
echo "Sending query for id via Memcache: ";
$mysqli->query("SELECT f1, f2, f3 FROM test WHERE id = 1");
/* f1 is not configured as valid key field, this won't be sent via Memcache */
echo "Sending query for f1 via Memcache: ";
$mysqli->query("SELECT id FROM test WHERE f1 = 1");
mysqlnd_memcache_set($mysqli);
/* Now the regular MySQL protocol will be used */
echo "var_dump won't be invoked: ";
$mysqli->query("SELECT f1, f2, f3 WHERE id = 1");
?>
]]>
&example.outputs;
&reftitle.seealso;
mysqlnd_memcache_get_config