PHP 메일 보내기 함수

function sendmail_ctrl($from_mail, $from_name, $to_mail, $to_name, $subject, $body, $headers)
{
$fp = popen( '/usr/sbin/sendmail -f'.$from_mail.' '.$to_mail,"w");
if(!$fp) return false;

if($to_name){
fputs($fp, "To: $to_name <$to_mail>\n");
}else{
fputs($fp, "To: $to_mail\n");
}

fputs($fp, "From: $from_name <$from_mail>\n");
fputs($fp, "Subject: $subject\n");
fputs($fp, $headers."\n\n");
fputs($fp, $body);
fputs($fp, "\n");
pclose($fp);
return true;
}