Push notification desde PHP - Firebase.

Push Notification

<?php 

 function send_notification($tokens, $message)
	{
	   $url='https://fcm.googleapis.com/fcm/send';

	   $fields = array(
	   				   'registration_ids' => $tokens,
	   				   'data' => $message
	   	              );


	   $headers = array(
	   				   'Authorization:key = AOyUEjHurDZNKM-D7hcGG7wnSwSEY_ngA4P-w',
	   				   'Content-Type: application/json'
	   	              );

	   $ch = curl_init();
	   curl_setopt($ch,CURLOPT_URL,$url);
	   curl_setopt($ch,CURLOPT_POST,true);
	   curl_setopt($ch,CURLOPT_HTTPHEADER,$headers);
	   curl_setopt($ch,CURLOPT_RETURNTRANSFER, true);
	   curl_setopt($ch,CURLOPT_SSL_VERIFYHOST, 0);
	   curl_setopt($ch,CURLOPT_SSL_VERIFYPEER, false);
	   curl_setopt($ch,CURLOPT_POSTFIELDS, json_encode($fields));

	   $result = curl_exec($ch);

	   if($result === FALSE)
	   {
	   	die('Curl failed: ' . curl_error($ch));
	   }
	   curl_close($ch);
	   return $result;
	}

	$conn = mysqli_connect("localhost","root","Password","fcm");
	$sql = "select token from users";
	$result = mysqli_query($conn,$sql);
	$tokens = array();

	if(mysqli_num_rows($result) > 0)
	{
 	   while ($row = mysqli_fetch_assoc($result)) 
 	   {
 	   	 $tokens[] = $row["Token"];
 	   }
 	  
	}

	mysqli_close($conn);

	$message = array("message" => "FCM PUSH NOTIFICATION TEST");
	$message_status = send_notification($tokens, $message);

	echo $message_status;

?>