Send push notification from firebase to android device

script for sending push notification to android phone

const GOOGLE_API_KEY = "XXXXX";
const GOOGLE_GCM_URL = "https://fcm.googleapis.com/fcm/send";

$fields = array(
	            'to'       => $device_token,
	            'sound'    => 'default',
	            'priority' => 'high',
	            'data'	   => array("title"			 => $this-title,
	            					          "message" 	 => $this->message // You may add more data
	            	            )
	        );
          
$headers = array(
	            self::GOOGLE_GCM_URL,
	            'Content-Type: application/json',
	            'Authorization: key='.self::GOOGLE_API_KEY
	        );

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, self::GOOGLE_GCM_URL);
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);