Запись в файл fwrite и перенос строк \r\n - [VM1] Общие вопросы и ошибки

if (!empty($checkout['email'])) {
	  $file_name='file.txt';
      $file = fopen($file_name, "a");
      fwrite($file, htmlentities($checkout['name'], ENT_COMPAT, "UTF-8").";".
                    htmlentities($checkout['email'], ENT_COMPAT, "UTF-8")." ");
      fclose($file);

fwrite($file, htmlentities($checkout['name'], ENT_COMPAT, "UTF-8", "\r\n").";".
                    htmlentities($checkout['email'], ENT_COMPAT, "UTF-8")." ");

$fp=fopen('notify_promsviazbank_cards_LOG.php','a');
$contents = "<?php  ";
$contents .= "\n\nORDER = ".$ORDER."\nAMOUNT = ".$AMOUNT."\nCURRENCY = ".$CURRENCY."\nRRN = ".$RRN."\nINT_REF = ".$INT_REF."\nTRTYPE = ".$TRTYPE."\nTERMINAL = ".$TERMINAL."\nBACKREF = ".$BACKREF."\nEMAIL = ".$EMAIL."\nTIMESTAMP = ".$TIMESTAMP."\nNONCE = ".$NONCE."\nRESULT = ".$RESULT."\nRC = ".$RC."\nRCTEXT = ".$RCTEXT."\nP_SIGN = ".$P_SIGN."\nNAME = ".$NAME."\nCARD = ".$CARD."\nORG_AMOUNT = ".$ORG_AMOUNT."\nP_SIGN_model = ".$P_SIGN_model."\n\n";
$contents .= "  ?>";
fwrite($fp, $contents, strlen($contents));  
fclose($fp); 

if (!empty($checkout['email'])) {
  $contents = "".htmlentities($checkout['name'], ENT_QUOTES, "UTF-8")."\n".htmlentities($checkout['email'], ENT_QUOTES, "UTF-8")."";
  $fp=fopen('file.txt','a');
  fwrite($fp, $contents, strlen($contents));  
  fclose($fp);
}

 if (!empty($checkout['email'])) {
	  
$file_name='file.txt';
      
$file = fopen($file_name, "a");
$contents = "".htmlentities($checkout['name'], ENT_QUOTES, "UTF-8")."\n".htmlentities($checkout['email'], ENT_QUOTES, "UTF-8")."";
  fwrite($file, $contents, strlen($contents));  
  fclose($file);}

fputs($file, $checkout['name']."; ".$checkout['email']."\r\n");