说明
int 
pg_connection_status ( resource connection)
     pg_connection_status() 返回一个连接的状态。可能的状态为
     PGSQL_CONNECTION_OK 和 PGSQL_CONNECTION_BAD。
    
     
例子 1. pg_connection_status() 例子 
<?php     $dbconn = pg_connect("dbname=publisher") or die("Could not connect");     $stat = pg_connection_status($dbconn);     echo 'connection_status: '.$stat; ?>
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例子 2. pg_connection_status() 例子 
<?php     $dbconn = pg_connect("dbname=publisher") or die("Could not connect");     $stat = pg_connection_status($dbconn);     echo 'connection_status: '.$stat; ?>
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     参见 pg_connection_busy()。