Oracle 5.0, Reference Manual

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Mysqlnd Memcache plugin (
mysqlnd_memcache
)
2803
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
.
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.
Return Values
TRUE
if the association or disassociation is successful, otherwise
FALSE
if there is an error.
Examples
Example 20.394.
mysqlnd_memcache_set
example with
var_dump
as a simple debugging
callback.
<?php
$mysqli = new mysqli("host", "user", "passwd", "database");
$memc = new Memcached();
$memc->addServer("host", 11211);
mysqlnd_memcache_set($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");
?>
The above example will output:
Sending query for id via Memcache: bool(true)
Sending query for f1 via Memcache: bool(false)
var_dump won't be invoked: