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이 문서에서는 PHP 중국어 웹사이트 매뉴얼 풀어 주다
(PECL sam >= 0.1.0)
SAMConnection::subscribe — Create a subscription to a specified topic.
$targetTopic
)The "subscribe" method is used to create a new subscription to a specified topic.
targetTopic
The identity of the topic (topic://topicname) to subscribe to.
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.
Example #1 Subscribe to a topic
<?php
$subid = $conn -> subscribe ( 'topic://A' );
if (! $subid ) {
// The subscribe failed!
echo "Subscribe failed ( $conn -> errno ) $conn -> error " ;
}
?>