check active node with line notify

gistfile1.txt

<?php


$content = file_get_contents("https://lokiblocks.com/service_nodes");
$data= explode('</a></td>', $content);
$a = 1;
$active = '';
$count = 0;
foreach($data as $value)
{
  $sn = substr($value, -64);
  if($sn == 'print_sn_key')
  {
    $count++;
    $active .= "\nLoki_1 is active";
  }else if($sn == 'print_sn_key'){
    $count++;
    $active .= "\nLoki_2  is active";
  }else if($sn == 'print_sn_key'){
    $count++;
    $active .= "\nLoki_3 is active";
  }else if($sn == 'print_sn_key'){
    $count++;
    $active .= "\nLoki_4 is active";
  }

}
	$line_token = ['token','token'];
				        for($i =0 ; $i<2;$i++)
				        {
			
									
									$line_token[$i];
									$ch = curl_init();
									curl_setopt($ch, CURLOPT_URL, "https://notify-api.line.me/api/notify");
									curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
									curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
									curl_setopt($ch, CURLOPT_POST, 1);

									curl_setopt($ch, CURLOPT_POSTFIELDS, "message= ". $active." \n\nNode running: ".$count." node");									
							
									curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
									curl_setopt($ch, CURLOPT_HTTPHEADER, [
													'Content-type: application/x-www-form-urlencoded',
													'Authorization: Bearer '.$line_token[$i],
											]);

									curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

									curl_exec($ch);
									curl_close($ch);
					
        				}