Online PHP editor | output for v00fv

<?php /* Parameter Example $data = array('post_id'=>'12345','post_title'=>'A Blog post'); $target = 'single tocken id or topic name'; or $target = array('token1','token2','...'); // up to 1000 in one request */ function sendMessage($data, $target){ //FCM api URL $url = 'https://fcm.googleapis.com/fcm/send'; //api_key available in Firebase Console -> Project Settings -> CLOUD MESSAGING -> Server key $server_key = 'AIzaSyDdGQuWaop0NoJd09t4DKLi-Vdt7hQJ0pU'; $fields = array(); $fields['data'] = $data; if(is_array($target)){ $fields['registration_ids'] = $target; }else{ $fields['to'] = $target; } //header with content_type api key $headers = array( 'Content-Type:application/json', 'Authorization:key='.$server_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; } echo sendMessage(array('message' => 'lol', 'post_title' => 'LOL'), '/topics/news'); ?>