send_notification.php

<?php

#API access key from Google API's Console
define( 'API_ACCESS_KEY', 'YOU_FIREBASE_CLOUD_MESSIGING_API_KEY' );

$registrationIds = "MOBILE_UNIQUE_ID";
#prep the bundle
$msg = array (
	'body' 	=> 'Body Of Notification',
	'title'	=> 'Title Of Notification'
);

$fields = array (
	'to'		=> $registrationIds,
	'notification'	=> $msg
);

$headers = array (
	'Authorization: key=' . API_ACCESS_KEY,
	'Content-Type: application/json'
);
#Send Reponse To FireBase Server
$ch = curl_init();
curl_setopt( $ch,CURLOPT_URL, 'https://fcm.googleapis.com/fcm/send' );
curl_setopt( $ch,CURLOPT_POST, true );
curl_setopt( $ch,CURLOPT_HTTPHEADER, $headers );
curl_setopt( $ch,CURLOPT_RETURNTRANSFER, true );
curl_setopt( $ch,CURLOPT_SSL_VERIFYPEER, false );
curl_setopt( $ch,CURLOPT_POSTFIELDS, json_encode( $fields ) );
$result = curl_exec($ch );
curl_close( $ch );
#Echo Result Of FireBase Server
echo $result;