Skip to content

Instantly share code, notes, and snippets.

@alexstone
Created March 3, 2014 06:54
Show Gist options
  • Save alexstone/9319715 to your computer and use it in GitHub Desktop.
Save alexstone/9319715 to your computer and use it in GitHub Desktop.
Fire a Slack Notification via CURL
<?php
// (string) $message - message to be passed to Slack
// (string) $room - room in which to write the message, too
// (string) $icon - You can set up custom emoji icons to use with each message
public static function slack($message, $room = "engineering", $icon = ":longbox:") {
$room = ($room) ? $room : "engineering";
$data = "payload=" . json_encode(array(
"channel" => "#{$room}",
"text" => $message,
"icon_emoji" => $icon
));
// You can get your webhook endpoint from your Slack settings
$ch = curl_init("WEBHOOK ENDPOINT GOES HERE");
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$result = curl_exec($ch);
curl_close($ch);
// Laravel-specific log writing method
// Log::info("Sent to Slack: " . $message, array('context' => 'Notifications'));
return $result;
}
@johnny-y-wang
Copy link

Thanks a lot!

@gberthalon
Copy link

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
you save my night yvonnel098

@viacreativedev
Copy link

Thanks for this!

@4foot30
Copy link

4foot30 commented Nov 20, 2016

@pugwonk Hello - I'm having similar URL-encoding issues. I tried your suggestion of curl_setopt($ch, CURLOPT_POSTFIELDS, array('payload' => $data)); which let me pass just about any character through without causing the Slack invalid_payload error - brilliant! :)

But the actual message came through to Slack in url-encoded form instead of readable text :( I think Slack have changed how they handle this since your post.

I'm doing $message = urlencode($message); - if I don't then I can't get proper formatting in the Slack message (it displays \n instead of actually putting in a line-break for example).

Has anyone else spotted anything like this?

Here's my code (roughly!):

            $message = urlencode($message); // Contains things like 'This is the message to the channel:\n\nHere is the second line with some *bold text* hopefully!'

            $channel = '#the-channel-to-post-to';
            $data = 'payload=' . json_encode(array(
                    'channel'  => $channel,
                    'text'     => $message,
            ));

            $url = 'MY_WEBHOOK_URL';

            $ch = curl_init();
            curl_setopt($ch, CURLOPT_URL, $url);
            curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
            curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
            $result = curl_exec($ch);
            if ($result === false) {
                echo 'Curl error: ' . curl_error($ch);
            }

            curl_close($ch);

Thanks :)

@4foot30
Copy link

4foot30 commented Nov 23, 2016

If it helps anyone, I got around most of the encoding problems by passing the parts of my $message through this function:

function htmlReplace($string) {
    // https://api.slack.com/docs/message-formatting#how_to_escape_characters
    // Also use backslashes to escape double quotes/backslashes themselves,
    // that would otherwise break the JSON.
    // (deal with the slashes before the quotes otherwise the escaped quotes would be re-escaped!)
    return str_replace(array('&', '<', '>', '\\', '"'), array('&amp;', '&lt;', '&gt;', '\\\\', '\"'), $string);
}

@jdc-cunningham
Copy link

Thank you

@repsher
Copy link

repsher commented Feb 26, 2017

Thank you!

@barrasme
Copy link

Top job exactly what I was looking for.

@InternetMedicineMan
Copy link

How are you able to set the channel? When I'm giving permission for my app to use the Incoming Webhook, I get a unique URL for every single Channel. I can send the channel all day long, but it's the URL that defines which channel it goes to. Is there a generic URL that I can't find? Or is there a permission I need to create that I am overlooking?

@mosin771098
Copy link

mosin771098 commented Jun 21, 2017

hello
i want to use slack rest api in curl to create a channel not with webhook but that is not working plz help me

@netEmmanuel
Copy link

Those this still work i am getting an error missing_text_or_fallback_or_attachments

@raholiarivelo
Copy link

thanks, it's help me so mush :)

in symfony nexylan / slack-bundle, we use "withIcon" to change the icon but here how to do it ?

@dani3l3
Copy link

dani3l3 commented Jan 31, 2021

Brilliant, thanks. emoji icons aren't working for me but, besides that, it's a very useful function!

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment