SAMConnection::subscribe
(PECL sam >= 0.1.0)
SAMConnection::subscribe — Create a subscription to a specified topic
说明
SAMConnection::subscribe
( string
$targetTopic
) : stringThe "subscribe" method is used to create a new subscription to a specified topic.
参数
-
targetTopic -
The identity of the topic (topic://topicname) to subscribe to.
返回值
A subscription identifier that can be used in a subsequent receive call as
a selector to obtain any topic data or FALSE if an error occurred. The
subscription identifier should be used in the receive call in place of the
simple topic name.
范例
Example #1 Subscribe to a topic
<?php
$subid = $conn->subscribe('topic://A');
if (!$subid) {
// The subscribe failed!
echo "Subscribe failed ($conn->errno) $conn->error";
}
?>