mysql_pconnect Open a persistent connection to a MySQL server &mysql.alternative.note; mysqli_connect with p: host prefix PDO::__construct with PDO::ATTR_PERSISTENT as a driver option &reftitle.description; resourcemysql_pconnect stringserverini_get("mysql.default_host") stringusernameini_get("mysql.default_user") stringpasswordini_get("mysql.default_password") intclient_flags0 Establishes a persistent connection to a MySQL server. 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'. &reftitle.parameters; server 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 the localhost. If the PHP directive mysql.default_host is undefined (default), then the default value is 'localhost:3306' username The username. Default value is the name of the user that owns the server process. password The password. Default value is an empty password. client_flags The client_flags parameter can be a combination of the following constants: 128 (enable LOAD DATA LOCAL handling), MYSQL_CLIENT_SSL, MYSQL_CLIENT_COMPRESS, MYSQL_CLIENT_IGNORE_SPACE or MYSQL_CLIENT_INTERACTIVE. &reftitle.returnvalues; Returns a MySQL persistent link identifier on success, or &false; on failure. &reftitle.notes; Note, that these kind of links only work if you are using a module version of PHP. See the Persistent 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. &reftitle.seealso; mysql_connect Persistent Database Connections