编辑代码

<?php 

private function getOsInfo(&$source) {

  $userAgent = $_SERVER['HTTP_USER_AGENT'];

  if(preg_match('/windows|win32/i', $userAgent)) {
    $os = 'Windows';
  } else if(preg_match('/macintosh|mac os x/i', $userAgent)) {
    $os = 'Mac';
  } else if(preg_match('/linux/i', $userAgent)) {
    $os = 'Linux'; 
  } else if(preg_match('/android/i', $userAgent)) {
    $os = 'Android';
  } else if(preg_match('/iphone|ipad|ipod/i', $userAgent)) {
    $os = 'iOS';
  } else {
    $os = 'Unknown';
  }

  $source['os'] = $os;

}