(PHP 4, PHP 5, PHP 7)
pg_pconnect — 打开一个持久的 PostgreSQL 连接
pg_pconnect() 打开一个到 PostgreSQL 数据库的持久连接。返回其它 PostgreSQL 函数所需要的连接资源号。
If a second call is made to pg_pconnect() with
connection_string as an existing connection, the
existing connection will be returned unless you pass
pg_close() 不能关闭由 pg_pconnect() 打开的持久连接。
connection_string can be empty to use all default parameters, or it
can contain one or more parameter settings separated by whitespace.
Each parameter setting is in the form keyword = value. Spaces around
the equal sign are optional. To write an empty value or a value
containing spaces, surround it with single quotes, e.g., keyword =
'a value'. Single quotes and backslashes within the value must be
escaped with a backslash, i.e., \' and \.
The currently recognized parameter keywords are:
requiressl (deprecated in favor of
service. Which of these arguments exist depends
on your PostgreSQL version.
PGSQL_CONNECT_FORCE_NEW is passed, then a new connection
is created, even if the
connection_string is identical to
an existing connection.
PostgreSQL connection resource on success,
FALSE on failure.
Example #1 Using pg_pconnect()
$dbconn = pg_pconnect("dbname=mary");
//connect to a database named "mary"
$dbconn2 = pg_pconnect("host=localhost port=5432 dbname=mary");
// connect to a database named "mary" on "localhost" at port "5432"
$dbconn3 = pg_pconnect("host=sheep port=5432 dbname=mary user=lamb password=foo");
//connect to a database named "mary" on the host "sheep" with a username and password
$conn_string = "host=sheep port=5432 dbname=test user=lamb password=bar";
$dbconn4 = pg_pconnect($conn_string);
//connect to a database named "test" on the host "sheep" with a username and password