How to send push notification message on android :
define( 'API_ACCESS_KEY',
'AIzaSyCpLu60wrNH5nTbOxnTC89YsLSJV7PwfAY' );
$message_txt =$_REQUEST['msg'];
$msg['message'] = array("other"=>
array('title'=>$message_txt));
$registrationIds = array();
$mylink = "SELECT
* FROM notification WHERE device_type ='android'"; // Ids whre send notifications
