Firebase Cloud Messaging PHP CURL

fcm_legacy.php

<?php
    require_once('configs.php');
    require_once('web_header.php');

    $PageTitle = "Test SMS";

    // Firebase Console -> Project Overview -> Settings -> Cloud Messaging
    $Configs['FCM_SERVER_KEY'] = "....";

    function CloudMessaging_SendMessage($message, $topic )
    {   global $Configs;
     
        $Server_Url = $Configs['FCM_SERVER_URL'];;     
        if ($Server_Url == '')
            $Server_Url = "https://fcm.googleapis.com/fcm/send";
     
        $Key = $Configs['FCM_SERVER_KEY'];
        
        if (is_array($message))
            $data = $message;
        else
            $data = array(
                "message" => $message
            );
     
        $fields = array(
            "to" => "/topics/" . $topic,
            'data' => $data,
            "priority" => $priority,
        );
     
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $Server_Url);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array(
            "Authorization: key={$Key}",
            'Content-Type: application/json'
        ));
        curl_setopt( $ch,CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt( $ch,CURLOPT_POSTFIELDS, json_encode( $fields ) );
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        $output = curl_exec ($ch);
        curl_close ($ch);

        return $output;
    }

    $Tx = $_REQUEST;
    $func = $_REQUEST['func'];
    $mode = $_REQUEST['mode'];
    $Id = intval($_REQUEST['id']);
    $errors = array();

    if ($func == 'submit')
    {   
        $topic = trim( $_REQUEST['topic'] );
        $message = trim( $_REQUEST['message'] );
        
        if (count($errors) == 0)
        {       

            if ($mode == '')
            {
                $res = CloudMessaging_SendMessage($message, $topic);
            }
        }
	}

?>

<div class="panel panel-primary">
    <div class="panel-heading">
  	<h2 class="panel-title"><?php echo $PageTitle ?></h2>
    </div>
    <div class="panel-body">


    <?php if (($mode == '') && ($res)) : ?>
    <div class="alert alert-success">
        <p>Sent result:</p>
        <code><?php echo print_r($res, 1) ?></code>
    </div>
    <?php endif;?>
        


    <?php if (count($errors)) : ?>
    <div class="alert alert-warning">
        <?php foreach($errors as $error) : ?>
        <li><?php echo $error ?></li>
        <?php endforeach ?>
    </div>
    <?php endif;?>
        
    <form class="form-horizontal" method="post" enctype="multipart/form-data">
	<input type="hidden" value="submit" name="func" />
	<input type="hidden" value="<?php echo $mode ?>" name="mode" />
	<input type="hidden" value="<?php echo $Id ?>" name="id" />
	<div class="form-group">
		<label class="col-sm-3 control-label" for="topic" >Topic</label>
		<div class="col-sm-5">
			<input type="text" class="form-control" id="topic" name="topic" placeholder="" value="<?php echo $Tx['topic'] ?>" required>
		</div>
	</div>
    <div class="form-group">
		<label class="col-sm-3 control-label" for="message" >Message</label>
		<div class="col-sm-6">
            <textarea class="form-control" id="message" name="message" rows="5"><?php echo FormatHtml( $Tx['message'] ) ?></textarea>
		</div>
	</div>
	<hr/>
	<div class="form-group">
		<div class="col-sm-offset-3 col-sm-9">
			<button type="submit" class="btn btn-primary confirm">บันทึก</button>
            <a href="<?php echo $TablePage ?>" class="btn btn-warning">ย้อนกลับ</a>            
		</div>
	</div>
	</form>
  </div>
</div>
<?php
    require_once('web_footer.php');
?>