Android Code Snippet Simple send Push Notification using PHP

<?php
                function sendNotification ($title,$body,$ServerKey) {
                $curl = curl_init();
                
                curl_setopt_array($curl, array(
                CURLOPT_URL => "https://fcm.googleapis.com/fcm/send",
                CURLOPT_RETURNTRANSFER => true,
                CURLOPT_ENCODING => "",
                CURLOPT_MAXREDIRS => 10,
                CURLOPT_TIMEOUT => 30,
                CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
                CURLOPT_CUSTOMREQUEST => "POST",
                CURLOPT_POSTFIELDS => "{\"data\":{\"title\":\"".$title."\",\"body\":\"".$body."\"},\"to\":\"\/topics\/general\"}",
                
                CURLOPT_HTTPHEADER => array(
                        "authorization: key=".$ServerKey,
                        "content-type: application/json"
                        ),
                ));
                
                $response = curl_exec($curl);
                $err = curl_error($curl);
                
                curl_close($curl);
                
                if ($err) {
                echo "cURL Error #:" . $err;
                } else {
                echo $response;
                }

                }


        sendNotification('Danger','Not really , just be prepared','xxxxxxxxxxxxxxxxxxxxxx' ); // change the xxxxxxxxxx for your Server Key from firebase console

?>