watcher not work

[krowkrow]

`$zk->get('/test', 'mywatch');

function mywatch($eventType, $eventState, $eventKey)
{
echo 'listen node';
print_r(func_get_args());
}
`

i add node /test/a, or remove it,
mywatch function not work,

PHP7.0.24 NTS

[Timandes]

According to ZooKeeper Programmer's Guide[1],

getData() and exists() set data watches. getChildren() sets child watches

So,

A successful create() will trigger a data watch for the znode being created and a child watch for the parent znode. A successful delete() will trigger both a data watch and a child watch (since there can be no more children) for a znode being deleted as well as a child watch for the parent znode.

[1] http://zookeeper.apache.org/doc/r3.5.3-beta/zookeeperProgrammers.html#ch_zkWatches