Error disconnecting Asterisk Manager - php

Question

I am using Asterisk Manager to get events on incoming calls. I want to disconnect the Manager when a "Ring" event is received.
Below is my code which checks the "Ring" event upon receiving a call. My code disconnects the Manager, but also generates an error. Sometimes the error message appears multiple times.
What am I doing wrong?
<?php
require_once('phpagi/phpagi.php');
function newstatus($ecode,$data,$server,$port){
if (!isset($data['ChannelStateDesc'])){
$data['ChannelStateDesc'] = '';
}
print_r($data);
if ($data['Event'] == "Newchannel" && $data['ChannelStateDesc'] == "Ring") {
echo "Call Ringing!!!\n";
global $asm;
$asm->disconnect();
}
}
$e = 'ENTERQUEUE';
if ($e == 'ENTERQUEUE'){
$asm = new AGI_AsteriskManager();
$asm->connect();
$asm->add_event_handler("Newchannel", "newstatus");
$asm->wait_response(true);
}
Error Message:
PHP Warning: fgets(): 9 is not a valid stream resource in /scripts/phpagi/phpagi-asmanager.php on line 158

Answer 1

With $asm->connect(); you open a socket,
with $asm->disconnect(); you close the socket.
The Problem is, disconnect closes the socket in the eventcallback, but wait_response is a eventloop and the eventhandler get called again on a disconnected state.
If a request was just sent, wait_response will return the response. Otherwise, it will loop forever, handling events.
If you have remaining code, you could call that code (function) in the event handler (ie, new_status). If you want to do something on every event, you could register a wildcard event handler.
function newstatus($ecode, $data, $server, $port)
{
// ...
echo "Call Ringing!!!\n";
do_something($data);
// ...no disconnect necessary
}
function on_all_events(...)
{
// ...
}
function do_something($data)
{
var_dump($data);
}
add_event_handler('*', 'on_all_events');