(PHP 5 >= 5.6.0, PHP 7)
pg_connect_poll — ���ڽ��г�����ѯ PostgreSQL ����״̬��
$connection
] ) : int
pg_connect_poll() ��ѯʹ�� pg_connect() ������ PostgreSQL ����״̬������
PGSQL_CONNECT_ASYNC
ѡ��
connection
PostgreSQL ���ݿ�������Դ
���س��� PGSQL_POLLING_FAILED
,
PGSQL_POLLING_READING
,
PGSQL_POLLING_WRITING
,
PGSQL_POLLING_OK
, ����
PGSQL_POLLING_ACTIVE
.