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(PHP 4, PHP 5)
mysql_pconnect — Open a persistent connection to a MySQL server
Esta extensão tornou-se defasada a partir do PHP 5.5.0 e foi removida no PHP 7.0.0. Em vez disso, as extensões MySQLi ou PDO_MySQL devem ser usadas. Veja também o guia MySQL: escolhendo uma API. Alternativas a esta função incluem:
p:
host prefixPDO::ATTR_PERSISTENT
as a driver option$server
= ini_get("mysql.default_host"),$username
= ini_get("mysql.default_user"),$password
= ini_get("mysql.default_password"),$client_flags
= 0Establishes 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'.
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
.
Returns a MySQL persistent link identifier on success, or false
on
failure.
Nota:
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.