Returns a positive MySQL persistent link identifier on
success, or FALSE on
error.
mysql_pconnect() establishes a
connection to a MySQL server. The following defaults are
assumed for missing optional parameters: server = 'localhost:3306', username = name of the user that owns
the server process and
password = empty password. The client_flags parameter can be a
combination of the constants MYSQL_CLIENT_SSL,
MYSQL_CLIENT_COMPRESS, MYSQL_CLIENT_IGNORE_SPACE or
MYSQL_CLIENT_INTERACTIVE.
The server parameter
can also include a port number. eg. "hostname:port" or a path
to a socket eg. ":/path/to/socket" for the localhost.
注: Support for ":port" was added in 3.0B4.
Support for the ":/path/to/socket" was added in 3.0.10.
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()).
The optional
client_flags parameter became available in PHP
4.3.0.
This type of link is therefore called 'persistent'.
注: 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.
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