(PHP 4, PHP 5, PECL mysql:1.0)
mysql_pconnect — Open a persistent connection to a MySQL server
([ string $server
[, string $username
[, string $password
[, int $client_flags
mysql_pconnect() acts very much like
mysql_connect() with two major differences.
First, when connecting, the function would first try to find a
(persistent) link that's already open with the same host,
username and password. If one is found, an identifier for it
will be returned instead of opening a new connection.
Second, the connection to the SQL server will not be closed when
the execution of the script ends. Instead, the link will remain
open for future use (mysql_close() will not
close links established by mysql_pconnect()).
This type of link is therefore called 'persistent'.
The MySQL server. It can also include a port number. e.g.
"hostname:port" or a path to a local socket e.g. ":/path/to/socket" for
If the PHP directive
mysql.default_host is undefined (default), then the default
value is 'localhost:3306'
The username. Default value is the name of the user that owns the
The password. Default value is an empty password.
parameter can be a combination
of the following constants:
128 (enable LOAD DATA LOCAL handling),
Returns a MySQL persistent link identifier on success, or FALSE on
Added the client_flags
Added support for ":/path/to/socket" with
Added support for ":port" with server
Note, that these kind of links only work if you are using
a module version of PHP. See the
Database Connections section for more information.
Using persistent connections can require a bit of tuning of your Apache
and MySQL configurations to ensure that you do not exceed the number of
connections allowed by MySQL.
You can suppress the error message on failure by prepending
to the function name.