function getip() { //获取ip
if ($_server[http_x_forwarded_for])
$ip = $_server[http_x_forwarded_for];
else if ($_server[http_client_ip])
$ip = $_server[http_client_ip];
else if ($_server[remote_addr])
$ip = $_server[remote_addr];
else if (getenv(http_x_forwarded_for))
$ip = getenv(http_x_forwarded_for);
else if (getenv(http_client_ip))
$ip = getenv(http_client_ip);
else if (getenv(remote_addr))
$ip = getenv(remote_addr);
else
$ip = unknown;
return $ip;
}
?>
复制代码 代码如下:
复制代码 代码如下:
function check_date($date) { //检查日期是否合法日期
$datearr = explode(-, $date);
if (is_numeric($datearr[0]) && is_numeric($datearr[1]) && is_numeric($datearr[2])) {
return checkdate($datearr[1],$datearr[2],$datearr[0]);
}
return false;
}
function check_time($time) { //检查时间是否合法时间
$timearr = explode(:, $time);
if (is_numeric($timearr[0]) && is_numeric($timearr[1]) && is_numeric($timearr[2])) {
if (($timearr[0] >= 0 && $timearr[0] = 0 && $timearr[1] = 0 && $timearr[2] return true;
else
return false;
}
return false;
}
function datediff($date1, $date2, $unit = ) { //时间比较函数，返回两个日期相差几秒、几分钟、几小时或几天
switch ($unit) {
case 's':
$dividend = 1;
break;
case 'i':
$dividend = 60;
break;
case 'h':
$dividend = 3600;
break;
case 'd':
$dividend = 86400;
break;
default:
$dividend = 86400;
}
$time1 = strtotime($date1);
$time2 = strtotime($date2);
if ($time1 && $time2)
return (float)($time1 - $time2) / $dividend;
return false;
}
?>
php重定向
复制代码 代码如下:
方法一：header(location: index.php);
方法二：echo window.location =$php_self;īpt>;
方法三：echo ;
?>
获取访问者浏览器
复制代码 代码如下:
function browse_infor()
{
$browser=;$browserver=;
$browsers =array(lynx,mosaic,aol,opera,java,macweb,webexplorer,omniweb);
$agent = $globals[http_user_agent];
for ($i=0; $i{
if (strpos($agent,$browsers[$i]))
{
$browser = $browsers[$i];
$browserver =;
}
}
if (ereg(mozilla,$agent) && !ereg(msie,$agent))
{
$temp =explode((, $agent); $part=$temp[0];
$temp =explode(/, $part); $browserver=$temp[1];
$temp =explode( ,$browserver); $browserver=$temp[0];
$browserver =preg_replace(/([d.]+)/,1,$browserver);
$browserver = $browserver;
$browser = netscape navigator;
}
if (ereg(mozilla,$agent) && ereg(opera,$agent))
{
$temp =explode((, $agent); $part=$temp[1];
$temp =explode(), $part); $browserver=$temp[1];
$temp =explode( ,$browserver);$browserver=$temp[2];
$browserver =preg_replace(/([d.]+)/,1,$browserver);
$browserver = $browserver;
$browser = opera;
}
if (ereg(mozilla,$agent) && ereg(msie,$agent))
{
$temp = explode((, $agent); $part=$temp[1];
$temp = explode(;,$part); $part=$temp[1];
$temp = explode( ,$part);$browserver=$temp[2];
$browserver =preg_replace(/([d.]+)/,1,$browserver);
$browserver = $browserver;
$browser = internet explorer;
}
if ($browser!=)
{
$browseinfo = $browser$browserver;
}
else
{
$browseinfo = unknown;
}
return $browseinfo;
}
//调用方法$browser=browseinfo() ;直接返回结果
?>
获取访问者操作系统
复制代码 代码如下:
function osinfo() {
$os=;
$agent = $globals[http_user_agent];
if (eregi('win',$agent) && strpos($agent, '95')) {
$os=windows 95;
}
elseif (eregi('win 9x',$agent) && strpos($agent, '4.90')) {
$os=windows me;
}
elseif (eregi('win',$agent) && ereg('98',$agent)) {
$os=windows 98;
}
elseif (eregi('win',$agent) && eregi('nt 5.0',$agent)) {
$os=windows 2000;
}
elseif (eregi('win',$agent) && eregi('nt',$agent)) {
$os=windows nt;
}
elseif (eregi('win',$agent) && eregi('nt 5.1',$agent)) {
$os=windows xp;
}
elseif (eregi('win',$agent) && ereg('32',$agent)) {
$os=windows 32;
}
elseif (eregi('linux',$agent)) {
$os=linux;
}
elseif (eregi('unix',$agent)) {
$os=unix;
}
elseif (eregi('sun',$agent) && eregi('os',$agent)) {
$os=sunos;
}
elseif (eregi('ibm',$agent) && eregi('os',$agent)) {
$os=ibm os/2;
}
elseif (eregi('mac',$agent) && eregi('pc',$agent)) {
$os=macintosh;
}
elseif (eregi('powerpc',$agent)) {
$os=powerpc;
}
elseif (eregi('aix',$agent)) {
$os=aix;
}
elseif (eregi('hpux',$agent)) {
$os=hpux;
}
elseif (eregi('netbsd',$agent)) {
$os=netbsd;
}
elseif (eregi('bsd',$agent)) {
$os=bsd;
}
elseif (ereg('osf1',$agent)) {
$os=osf1;
}
elseif (ereg('irix',$agent)) {
$os=irix;
}
elseif (eregi('freebsd',$agent)) {
$os=freebsd;
}
if ($os=='') $os = unknown;
return $os;
}
//调用方法$os=os_infor() ;
?>
文件格式类
复制代码 代码如下:
$mime_types = array(
'gif' => 'image/gif',
'jpg' => 'image/jpeg',
'jpeg' => 'image/jpeg',
'jpe' => 'image/jpeg',
'bmp' => 'image/bmp',
'png' => 'image/png',
'tif' => 'image/tiff',
'tiff' => 'image/tiff',
'pict' => 'image/x-pict',
'pic' => 'image/x-pict',
'pct' => 'image/x-pict',
'tif' => 'image/tiff',
'tiff' => 'image/tiff',
'psd' => 'image/x-photoshop',
'swf' => 'application/x-shockwave-flash',
'js' => 'application/x-javascrīpt',
'pdf' => 'application/pdf',
'ps' => 'application/postscrīpt',
'eps' => 'application/postscrīpt',
'ai' => 'application/postscrīpt',
'wmf' => 'application/x-msmetafile',
'css' => 'text/css',
'htm' => 'text/html',
'html' => 'text/html',
'txt' => 'text/plain',
'xml' => 'text/xml',
'wml' => 'text/wml',
'wbmp' => 'image/vnd.wap.wbmp',
'mid' => 'audio/midi',
'wav' => 'audio/wav',
'mp3' => 'audio/mpeg',
'mp2' => 'audio/mpeg',
'avi' => 'video/x-msvideo',
'mpeg' => 'video/mpeg',
'mpg' => 'video/mpeg',
'qt' => 'video/quicktime',
'mov' => 'video/quicktime',
'lha' => 'application/x-lha',
'lzh' => 'application/x-lha',
'z' => 'application/x-compress',
'gtar' => 'application/x-gtar',
'gz' => 'application/x-gzip',
'gzip' => 'application/x-gzip',
'tgz' => 'application/x-gzip',
'tar' => 'application/x-tar',
'bz2' => 'application/bzip2',
'zip' => 'application/zip',
'arj' => 'application/x-arj',
'rar' => 'application/x-rar-compressed',
'hqx' => 'application/mac-binhex40',
'sit' => 'application/x-stuffit',
'bin' => 'application/x-macbinary',
'uu' => 'text/x-uuencode',
'uue' => 'text/x-uuencode',
'latex'=> 'application/x-latex',
'ltx' => 'application/x-latex',
'tcl' => 'application/x-tcl',
'pgp' => 'application/pgp',
'asc' => 'application/pgp',
'exe' => 'application/x-msdownload',
'doc' => 'application/msword',
'rtf' => 'application/rtf',
'xls' => 'application/vnd.ms-excel',
'ppt' => 'application/vnd.ms-powerpoint',
'mdb' => 'application/x-msaccess',
'wri' => 'application/x-mswrite',
);
?>
php生成excel文档
复制代码 代码如下:
header(content-type:application/vnd.ms-excel);
header(content-disposition:filename=test.xls);
echo test1t;
echo test2tn;
echo test1t;
echo test2tn;
echo test1t;
echo test2tn;
echo test1t;
echo test2tn;
echo test1t;
echo test2tn;
echo test1t;
echo test2tn;
//改动相应文件头就可以输出.doc .xls等文件格式了
?>
时间比较问题
举一个简单例子说明:比如一个论坛对当天发表的贴子用new图片标记一下。
方法一：
复制代码 代码如下:
//$db->rows[$i][date]中为数据库中datetime字段值.
$today=time();
$theday=date(y-m-d h:i:s,$today-24*3600);
$newtag=$db->rows[$i][date]>=$theday?:;
//方法二：
$newtag=$db->rows[$i][date]>=date(y-m-d 00:00:00)?:;
?>
复制代码 代码如下:
//提取页面和浏览器提交的变量，作用相当于使php.ini开了全局变量
@extract($_server, extr_skip);
@extract($_session, extr_skip);
@extract($_post, extr_skip);
@extract($_files, extr_skip);
@extract($_get, extr_skip);
@extract($_env, extr_skip);
?>
//读取文件函数
复制代码 代码如下:
function readfromfile($file_name) {
if (file_exists($file_name)) {
$filenum=fopen($file_name,r);
flock($filenum,lock_ex);
$file_data=fread($filenum, filesize($file_name));
rewind($filenum);
fclose($filenum);
return $file_data;
}
}
?>
//写入文件函数
复制代码 代码如下:
function writetofile($file_name,$data,$method=w) {
$filenum=fopen($file_name,$method);
flock($filenum,lock_ex);
$file_data=fwrite($filenum,$data);
fclose($filenum);
return $file_data;
}
?>
http://www.bkjia.com/phpjc/319306.htmlwww.bkjia.comtruehttp://www.bkjia.com/phpjc/319306.htmltecharticle复制代码 代码如下: ? function getip() { //获取ip if ($_server[http_x_forwarded_for]) $ip = $_server[http_x_forwarded_for]; else if ($_server[http_client_ip]) $ip =...