(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
pg_get_notify — 获取 SQL NOTIFY 消息
pg_get_notify() 取得 SQL 命令 NOTIFY
生成的消息。要接收通知,必须发送 SQL 命令 LISTEN
。
connection
PgSql\Connection 实例。
mode
An optional parameter that controls how the returned array is indexed. mode
is a constant and can take the following values: PGSQL_ASSOC
, PGSQL_NUM
and PGSQL_BOTH
. Using PGSQL_NUM
, the function will return an array with numerical indices, using PGSQL_ASSOC
it will return only associative indices while PGSQL_BOTH
will return both numerical and associative indices.
版本 | 说明 |
---|---|
8.1.0 | 现在 connection 参数接受 PgSql\Connection 实例,之前接受 resource。 |
示例 #1 PostgreSQL NOTIFY 消息
<?php
$conn = pg_pconnect("dbname=publisher");
if (!$conn) {
echo "An error occurred.\n";
exit;
}
// 从其它进程监听 'author_updated' 消息
pg_query($conn, 'LISTEN author_updated;');
$notify = pg_get_notify($conn);
if (!$notify) {
echo "No messages\n";
} else {
print_r($notify);
}
?>