Send Apple Push Notifications (APN) from PHP Web Application

Hello,

In this blog I am going to explain how to configure your PHP server to send Apple Push Notifications (APN). Please note you will need a valid apple developer account for this.

First of all you will need a PEM file on your server. Following are the steps to create PEM file. Log into apple member center with your developer account credentials.

https://developer.apple.com/membercenter/index.action

Go to Certificates, Identifies & Profiles

Select iOS Apps - > Certificates

We will see how to create both development and production PEM file. Click on + sign on top right corner to add new certificate. It will show you list of certificate types.



Choose from development if you want development certificate or choose from production if you want production certificate. Click on Next and it will ask you to select your application in next step.



Select your desired application and click on next. Now you have to upload certificate signing request. Following are steps to generate certificate signing request

• Open Keychain Access on your Mac (located in Applications/Utilities).
• Open Preferences and click Certificates. Make sure both Online Certificate Status Protocol and Certificate Revocation List are set to Off.
• Choose Keychain Access > Certificate Assistant > Request a Certificate From a Certificate Authority.
• Note: If you have a private key selected when you do this, the CSR won’t be accepted. Make sure no private key is selected. Enter your user email address and common name. Use the same address and name as you used to register in the iOS Developer Program. No CA Email Address is required.
• Select the options “Saved to disk” and “Let me specify key pair information” and click Continue.
• Specify a filename and click Save.

Upload CSR in the following screen and click on continue.



In the next step click on generate and it will generate your certificate. Download certificate to your local machine and double click on it and it will be added to key chain access and it will open and should show you following screen.



As you can see above development certificates are added as Apple Development iOS Push Services and Production certificate are added as Apple Push Services. Now click on left arrow and expand it. You will see name of certificate signing authority there. Select both name and certificate and double tap on it it will show you following menu.



Click on export two items and save .p12 file.



Now we will convert .p12 file to .pem file using OpenSSL. Open your terminal and run following command.

openssl pkcs12 -in Certificates.p12 -out Certificates.pem -nodes -clcerts

That's it your pem file is ready. Upload it your server and add following functions to send APNs for production and development respectively in your PHP.

public function sendAPNProduction($deviceToken, $msg, $message){

        $payload['aps'] = array('alert' => $msg, 'badge' => 1, 'sound' => 'default');
        $payload['messages'] = $message;
        $payload = json_encode($payload);

        $apnsCert = 'Certicates.pem';

        $streamContext = stream_context_create();
        stream_context_set_option($streamContext, 'ssl', 'local_cert', $apnsCert);

        $apns = stream_socket_client('ssl://gateway.push.apple.com:2195', $error, $errorString, 2, STREAM_CLIENT_CONNECT, $streamContext);

        $apnsMessage = chr(0) . chr(0) . chr(32) . pack('H*', str_replace(' ', '', $deviceToken)) . chr(0) . chr(strlen($payload)) . $payload;
        fwrite($apns, $apnsMessage);

        //socket_close($apns); seems to be wrong here ...
        fclose($apns);

}

public function sendAPNDevelopment($deviceToken, $msg, $message){

        $payload['aps'] = array('alert' => $msg, 'badge' => 1, 'sound' => 'default');
        $payload['messages'] = $message;
        $payload = json_encode($payload);

        $apnsCert = 'Certicates.pem';

        $streamContext = stream_context_create();
        stream_context_set_option($streamContext, 'ssl', 'local_cert', $apnsCert);

        $apns = stream_socket_client('ssl://gateway.sandbox.push.apple.com:2195', $error, $errorString, 2, STREAM_CLIENT_CONNECT, $streamContext);

        $apnsMessage = chr(0) . chr(0) . chr(32) . pack('H*', str_replace(' ', '', $deviceToken)) . chr(0) . chr(strlen($payload)) . $payload;
        fwrite($apns, $apnsMessage);

        //socket_close($apns); seems to be wrong here ...
        fclose($apns);

}

That's it and now your PHP web app is ready to send Apple Push Notifications (APNs). I hope this helps you.