Edit

[EDIT] FILE: test.php

f<?php

ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

echo 'dsd';
//API URL of FCM
		$url = 'https://fcm.googleapis.com/fcm/send';

/*api_key available in:
		Firebase Console -> Project Settings -> CLOUD MESSAGING -> Server key*/   
		
		$api_key = 'AAAAmvXY1N8:APA91bHZWMGHRadYCgzE354MdYf7nfqmMyfxO4XvjfMSYV6GNZ4m06fjMnwJdDQQmGCEvidU5HSU8Eb8jY3V71SJW1os-LTT0nrYZWkpNUNuHaBA9iv9BIvTz9n6Db9hf7a_GMv7Ud-i';
					
		$fields = array (
			'registration_ids' => array (
					"rg"
			),
			'data' => array (
					"message" => 'dfgdfg'
			)
		);

$api_key = 'AAAAn-F4NX4:APA91bGo1j7rqDpc1FtozZl7-2K4CdBGuZ5sIWX1uWisPCu-zRl_ynaYkslQxR6X7xjZygeAHIv_O-qInCZ5z_ZKrQfjrOJCVeAH8fg-AF_esgO6oemNPrdY_SqnzXerCmQcwxTE3TvK';

//header includes Content type and api key
		$headers = array(
			'Content-Type:application/json',
			'Authorization:key='.$api_key
		);
					
				
    
    
    
    $ch = curl_init();
		curl_setopt($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 ($result === FALSE) {
			die('FCM Send Error: ' . curl_error($ch));
		}
		curl_close($ch);
		return $result;

CANCEL