php 取得客户端IP地址代码

取得客户端ip地址
<?

//开源代码

function getip(){
             if (getenv("http_client_ip") && strcasecmp(getenv("http_client_ip"), "unknown"))
$ip = getenv("http_client_ip"); //开源
             else if (getenv("http_x_forwarded_for") && strcasecmp(getenv("http_x_forwarded_for"), "unknown"))
$ip = getenv("http_x_forwarded_for"); //
             else if (getenv("remote_addr") && strcasecmp(getenv("remote_addr"), "unknown"))
$ip = getenv("remote_addr");
             else if (isset($_server[@#remote_addr@#]) && $_server[@#remote_addr@#] && strcasecmp($_server[@#remote_addr@#], "unknown"))

//

$ip = $_server[@#remote_addr@#];
else
$ip = "unknown";
             return($ip);
}
?>

判断邮箱地址
<?
function checkemail($inaddress)
{
return (ereg("^([a-za-z0-9_-])+@([a-za-z0-9_-])+(.[a-za-z0-9_-])+",$inaddress));
}
?>

<?
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;
}
?>

<?
function browse_infor()
{
$browser="";$browserver="";

//

$browsers =array("lynx","mosaic","aol","opera","java","macweb","webexplorer","omniweb");
$agent = $globals["http_user_agent"];
for ($i=0; $i<=7; $i++) //一聚教程
{
if (strpos($agent,$browsers[$i]))
{
$browser = $browsers[$i];
$browserver ="";
}
}
if (ereg("mozilla",$agent) && !ereg("msie",$agent)) //一聚教程
{
$temp =explode("(", $agent); $part=$temp[0];
$temp =explode("/", $part); $browserver=$temp[1];

//开源

$temp =explode(" ",$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];

//php一聚教程

$temp =explode(")", $part); $browserver=$temp[1];
$temp =explode(" ",$browserver);$browserver=$temp[2];

//一聚教程

$browserver =preg_replace("/([d.]+)/","1",$browserver);
$browserver = " $browserver";
$browser = "opera";
}
if (ereg("mozilla",$agent) && ereg("msie",$agent))

//php一聚教程

{
$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
<?
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)) {

//开源

$os="windows 98";
}
elseif (eregi('win',$agent) && eregi('nt 5.0',$agent)) {
$os="windows 2000";
}
elseif (eregi('win',$agent) && eregi('nt',$agent)) {

//开源

$os="windows nt";
}
elseif (eregi('win',$agent) && eregi('nt 5.1',$agent)) {
$os="windows xp";
}
elseif (eregi('win',$agent) && ereg('32',$agent)) {

//开源

$os="windows 32";
}
elseif (eregi('linux',$agent)) {
$os="linux";
}
elseif (eregi('unix',$agent)) {
$os="unix"; //php一聚教程
}
elseif (eregi('sun',$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";

//一聚教程

}
elseif (eregi('netbsd',$agent)) {
$os="netbsd";
}
elseif (eregi('bsd',$agent)) {
$os="bsd";
}
elseif (ereg('osf1',$agent)) {

//一聚教程

$os="osf1";
}
elseif (ereg('irix',$agent)) {
$os="irix";
}
elseif (eregi('freebsd',$agent)) {
$os="freebsd";

//

}
if ($os=='') $os = "unknown";
return $os;
}
//调用方法$os=os_infor() ;
?>

这里的日期操作函数有时间的增加，计算出给出的日期是星期几 ，检查日期是否合法日期  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

<?php
function dateadd($date, $int, $unit = "d") {

//时间的增加（还可以改进成时分秒都可以增加，有时间再补上）
$datearr = explode("-", $date);
$value[$unit] = $int;

//

    return date("y-m-d", mktime(0,0,0, $datearr[1] + $value['m'], $datearr[2] + $value['d'], $datearr[0] + $value['y']));

//一聚教程网

}

function getweekday($date) {  //计算出给出的日期是星期几
$datearr = explode("-", $date);
    return date("w", mktime(0,0,0,$datearr[1],$datearr[2],$datearr[0]));

//

}
?>

<?
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])) { //一聚教程网
        return checkdate($datearr[1],$datearr[2],$datearr[0]);
    }
    return false;
}
function check_time($time) {  //检查时间是否合法时间

//一聚教程网

$timearr = explode(":", $time);
    if (is_numeric($timearr[0]) && is_numeric($timearr[1]) && is_numeric($timearr[2])) {

//

        if (($timearr[0] >= 0 && $timearr[0] <= 23) && ($timearr[1] >= 0 && $timearr[1] <= 59) && ($timearr[2] >= 0 && $timearr[2] <= 59))

//php

            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;
}
?>

//html表格的每行转为csv格式数组

<?
function get_tr_array($table) {

//php教程开源代码

$table = preg_replace("'<td[^>]*?>'si",'"',$table);
$table = str_replace("</td>",'",',$table);
$table = str_replace("</tr>","{tr}",$table); //开源代码osphp.com.cn
//去掉 html 标记 
$table = preg_replace("'<[/!]*?[^<>]*?>'si","",$table);
//去掉空白字符  
$table = preg_replace("'([rn])[s]+'","",$table);

$table = str_replace(" ","",$table);
$table = str_replace(" ","",$table);
$table = explode(",{tr}",$table);

array_pop($table);
        return $table;
}
?>

//将html表格的每行每列转为数组，采集表格数据

<?
function get_td_array($table) {
$table = preg_replace("'<table[^>]*?>'si","",$table);

//osphp.com.cn

$table = preg_replace("'<tr[^>]*?>'si","",$table);
$table = preg_replace("'<td[^>]*?>'si","",$table);
$table = str_replace("</tr>","{tr}",$table); //开源代码osphp.com.cn
$table = str_replace("</td>","{td}",$table);
//去掉 html 标记 
$table = preg_replace("'<[/!]*?[^<>]*?>'si","",$table); //osphp.com.cn开源
//去掉空白字符  
$table = preg_replace("'([rn])[s]+'","",$table);
$table = str_replace(" ","",$table);

 

$table = str_replace(" ","",$table);
$table = explode('{tr}', $table);
array_pop($table); //php开源代码
        foreach ($table as $key=>$tr) {
$td = explode('{td}', $tr);
array_pop($td);
$td_array[] = $td; //        }
        return $td_array;
}
?>

//返回字符串中的所有单词 $distinct=true 去除重复

<?
function split_en_str($str,$distinct=true) {
preg_match_all('/([a-za-z]+)/',$str,$match);

        if ($distinct == true) {
$match[1] = array_unique($match[1]);
        }
sort($match[1]); //osphp.com.cn
        return $match[1];
}
?>

//取得所有链接

<?
function get_all_url($code){ 
preg_match_all('/<as+href=["|']?([^>"' ]+)["|']?s*[^>]*>([^>]+)</a>/i',$code,$arr);  //osphp.com.cn
        return array('name'=>$arr[2],'url'=>$arr[1]); 
}
?>