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Issue while trying to receive message notifications from Slack

About

I am trying to receive message posted on my server as soon as user post message the message in group or channel or direct in slack.

App Status

enter image description here

Code in the verified file where challenge was posted.

header('Content-type: application/json');
$myfile = fopen("test.txt", "w") or die("Unable to open file!");
$data = json_decode(file_get_contents('php://input'), true);
fwrite($myfile, $data["challenge"]);
fclose($myfile);
$json = '{"challenge":' . $data["challenge"] . '}';
echo json_encode(["challenge" => $json]);

Question

Now that the above url has been verified successfully, I am still not able to receive the posted messages. I was expecting messages posted at same url which was used to verify challenge parameter. Is that correct?

Am I missing anything retrieving the messages posted on my server?



source https://stackoverflow.com/questions/70535363/issue-while-trying-to-receive-message-notifications-from-slack

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