function.php

八星瓢虫留言本特点：采用PHP+Access数据库实现

<?php
//获取正确时间
function gettime()
{
  $tmphour=date("g")+8;
  $tmpnow=date("Y-n-j")." ".$tmphour.date(":i:s");
  return $tmpnow;
}
//获取真实IP
function getip()
{
  $ip = getenv("HTTP_X_FORWARDED_FOR");
  if (($ip = "") || ($ip = "unknown")) $ip=getenv("REMOTE_ADDR");
  return $ip; 
} 
//获取操作系统类型
function getos() 
{ 
  $agent = $_ENV["HTTP_USER_AGENT"];
  if (eregi('win', $agent) && strpos($agent, '95')){ 
    $os = 'Windows 95'; 
  } 
  else if (eregi('win 9x', $agent) && strpos($agent, '4.90')){ 
    $os = 'Windows ME'; 
  } 
  else if (eregi('win', $agent) && ereg('98', $agent)){ 
    $os = 'Windows 98'; 
  } 
  else if (eregi('win', $agent) && eregi('nt 5.1', $agent)){ 
    $os = 'Windows XP'; 
  } 
  else if (eregi('win', $agent) && eregi('nt 5', $agent)){ 
    $os = 'Windows 2000'; 
  } 
  else if (eregi('win', $agent) && eregi('nt', $agent)){ 
    $os = 'Windows NT'; 
  } 
  else if (eregi('win', $agent) && ereg('32', $agent)){ 
    $os = 'Windows 32'; 
  } 
  else if (eregi('linux', $agent)){ 
    $os = 'Linux'; 
  } 
  else if (eregi('unix', $agent)){ 
    $os = 'Unix'; 
  } 
  else if (eregi('sun', $agent) && eregi('os', $agent)){ 
    $os = 'SunOS'; 
  } 
  else if (eregi('ibm', $agent) && eregi('os', $agent)){ 
    $os = 'IBM OS/2'; 
  } 
  else if (eregi('Mac', $agent) && eregi('PC', $agent)){ 
    $os = 'Macintosh'; 
  } 
  else if (eregi('PowerPC', $agent)){ 
    $os = 'PowerPC'; 
  } 
  else if (eregi('AIX', $agent)){ 
    $os = 'AIX'; 
  } 
  else if (eregi('HPUX', $agent)){ 
    $os = 'HPUX'; 
  } 
  else if (eregi('NetBSD', $agent)){ 
    $os = 'NetBSD'; 
  } 
  else if (eregi('BSD', $agent)){ 
    $os = 'BSD'; 
  } 
  else if (ereg('OSF1', $agent)){ 
    $os = 'OSF1'; 
  } 
  else if (ereg('IRIX', $agent)){ 
    $os = 'IRIX'; 
  } 
  else if (eregi('FreeBSD', $agent)){ 
    $os = 'FreeBSD'; 
  } 
  else if (eregi('teleport', $agent)){ 
    $os = 'teleport'; 
  } 
  else if (eregi('flashget', $agent)){ 
    $os = 'flashget'; 
  } 
  else if (eregi('webzip', $agent)){ 
    $os = 'webzip'; 
  } 
  else if (eregi('offline', $agent)){ 
    $os = 'offline'; 
  } 
  else { 
    $os = 'Unknown'; 
  } 
  return $os; 
}
//提示信息并导向
function alert($msg,$url)
{
  if (is_int($url)==true)
  {
    if ($url==0)
    {
      echo "<script>alert(\"$msg\");window.close();</script>";
    }
    else
    {
      echo "<script>alert(\"$msg\");history.go(-$url);</script>";
    }
  }
  else
  {
    echo "<script>alert(\"$msg\");window.location=\"$url\";</script>";
  }
  exit;
}
//检查是否合法参数
function chkint($value)
{
  $value=intval($value);
  if ($value<=0)
  {
    echo "<script>alert(\"参数错误！\");history.go(-1);</script>";
    exit;
  }
  return $value;
}
?>