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Last updated: Mon, 16 Jul 2012


(PHP 3, PHP 4, PHP 5)

pg_connect -- 打开一个 PostgreSQL 连接


resource pg_connect ( string connection_string )

pg_connect() 返回其它 PostgreSQL 函数所需要的资源。

pg_connect() 打开一个由 connection_string 所指定的 PostgreSQL 数据库的连接。如果成功则返回连接资源,如果不能连接则返回 FALSEconnection_string 应该是用引号引起来的字符串。

例子 1. 使用 pg_connect()

= pg_connect("dbname=mary");
//connect to a database named "mary"
$dbconn2 = pg_connect("host=localhost port=5432 dbname=mary");
// connect to a database named "mary" on "localhost" at port "5432"
$dbconn3 = pg_connect("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";
$dbconn4 = pg_connect($conn_string);
//connect to a database named "test" on the host "sheep" with a username and password
connection_string 所包括的参数有 hostporttty, optionsdbname, userpassword

如果用同样的 connection_string 再次调用 pg_connect(),不会建立新连接,而是返回前面已经打开的连接资源。如果使用不同的连接字符串,则可以和同一个数据库建立多个连接。

旧的多参数语法 $conn = pg_connect("host", "port", "options", "tty", "dbname") 已经不提倡使用。

参见 pg_pconnect()pg_close()pg_host()pg_port(), pg_tty()pg_options()pg_dbname()

 Last updated: Mon, 16 Jul 2012
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