收藏PHP常用函數

<?
function GetIP() { //獲取IP
    if ($_SERVER["HTTP_X_FORWARDED_FOR"])
        $ip = $_SERVER["HTTP_X_FORWARDED_FOR"]; //OSPHP.COm.CN
    else if ($_SERVER["HTTP_CLIENT_IP"])
        $ip = $_SERVER["HTTP_CLIENT_IP"];
    else if ($_SERVER["REMOTE_ADDR"])
        $ip = $_SERVER["REMOTE_ADDR"];
//開源代碼OSPHP.COM.Cn

    else if (getenv("HTTP_X_FORWARDED_FOR"))
        $ip = getenv("HTTP_X_FORWARDED_FOR");
    else if (getenv("HTTP_CLIENT_IP"))
        $ip = getenv("HTTP_CLIENT_IP");
//PHP開源代碼

    else if (getenv("REMOTE_ADDR"))
        $ip = getenv("REMOTE_ADDR");
    else
        $ip = "Unknown";
    return $ip;
}
?>

 //OSPHP.COM.Cn開源
<?php
function DateAdd($date, $int, $unit = "d") { //時間的增加（還可以改進成時分秒都可以增加，有時

間再補上）
    $dateArr = explode("-", $date);
    $value[$unit] = $int; //PHP開源代碼
    return date("Y-m-d", mktime(0,0,0, $dateArr[1] + $value['m'], $dateArr[2] + $value

['d'], $dateArr[0] + $value['y']));
//開源代碼OSPhP.COm.CN

}

function GetWeekDay($date) {  //計算出給出的日期是星期幾
    $dateArr = explode("-", $date);
    return date("w", mktime(0,0,0,$dateArr[1],$dateArr[2],$dateArr[0])); //PHP開源代碼
}
?>

 

 
<?
function check_date($date) { //檢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])) { //

開源OSPhP.COM.CN
        return checkdate($dateArr[1],$dateArr[2],$dateArr[0]);
    }
    return false;
}
function check_time($time) {  //檢查時間是否合法時間
//oSPHP.COM.CN

    $timeArr = explode(":", $time);
    if (is_numeric($timeArr[0]) && is_numeric($timeArr[1]) && is_numeric($timeArr[2])) {
//OSPHP.com.CN

        if (($timeArr[0] >= 0 && $timeArr[0] <= 23) && ($timeArr[1] >= 0 && $timeArr[1] <=

59) && ($timeArr[2] >= 0 && $timeArr[2] <= 59)) //PHP開源代碼
            return true;
        else
            return false;
    }
    return false;
}

function DateDiff($date1, $date2, $unit = "") { //時間比較函數，返回兩個日期相差幾秒、幾分鐘

、幾小時或幾天
//開源代碼OSPhP.COm.CN

    switch ($unit) {
        case 's':
            $dividend = 1;
            break;
        case 'i':
            $dividend = 60;
//開源OSPhP.COM.CN

            break;
        case 'h':
            $dividend = 3600;
            break;
        case 'd':
            $dividend = 86400;
            break;
//OSPHP.com.CN

        default:
            $dividend = 86400;
    }
    $time1 = strtotime($date1);
    $time2 = strtotime($date2);
    if ($time1 && $time2)
//oSPHP.COM.CN

        return (float)($time1 - $time2) / $dividend;
    return false;
}

?>

 
PHP重定向
<?
方法一：header("Location: index.php");
方法二：echo "<scrīpt>window.location ="$PHP_SELF";</scrīpt>"; //OsPHP.COM.CN
方法三：echo "<META HTTP-EQUIV="Refresh" CONTENT="0; URL=index.php">";

?>

 
獲取訪問者瀏覽器
<?
function browse_infor()
{
$browser="";$browserver=""; //開源代碼OSPhP.COm.CN
$Browsers =array("Lynx","MOSAIC","AOL","Opera","JAVA","MacWeb","WebExplorer","OmniWeb");
$Agent = $GLOBALS["HTTP_USER_AGENT"];
for ($i=0; $i<=7; $i++)
//OsPHP.COM.CN

{
if (strpos($Agent,$Browsers[$i]))
{
$browser = $Browsers[$i];
$browserver ="";
}
}
if (ereg("Mozilla",$Agent) && !ereg("MSIE",$Agent))
//oSPHP.COM.CN

{
$temp =explode("(", $Agent); $Part=$temp[0];
$temp =explode("/", $Part); $browserver=$temp[1]; //oSPHP.COM.CN
$temp =explode(" ",$browserver); $browserver=$temp[0];
$browserver =preg_replace("/([d.]+)/","1",$browserver);
$browserver = " $browserver";
//PHP開源代碼

$browser = "Netscape Navigator";
}
if (ereg("Mozilla",$Agent) && ereg("Opera",$Agent))
{
$temp =explode("(", $Agent); $Part=$temp[1];
//開源代碼OSPHP.COM.Cn

$temp =explode(")", $Part); $browserver=$temp[1];
$temp =explode(" ",$browserver);$browserver=$temp[2]; //OSPHP.COM.Cn開源
$browserver =preg_replace("/([d.]+)/","1",$browserver);
$browserver = " $browserver";
$browser = "Opera";
}
if (ereg("Mozilla",$Agent) && ereg("MSIE",$Agent))
//PHP開源代碼

{
$temp = explode("(", $Agent); $Part=$temp[1];
$temp = explode(";",$Part); $Part=$temp[1]; //OsPHP.COM.CN
$temp = explode(" ",$Part);$browserver=$temp[2];
$browserver =preg_replace("/([d.]+)/","1",$browserver);
$browserver = " $browserver"; //PHP開源代碼
$browser = "Internet Explorer";
}
if ($browser!="")
{
$browseinfo = "$browser$browserver";
}
else
{
$browseinfo = "Unknown";
}
return $browseinfo;
}
//調用方法$browser=browseinfo() ;直接返回結果

?>
//OsPHP.COM.CN

 
獲取訪問者操作系統
<?
function osinfo() {
$os="";
$Agent = $GLOBALS["HTTP_USER_AGENT"];
if (eregi('win',$Agent) && strpos($Agent, '95')) { //OSPHP.COM.Cn開源
$os="Windows 95";
}
elseif (eregi('win 9x',$Agent) && strpos($Agent, '4.90')) {
$os="Windows ME";
}
elseif (eregi('win',$Agent) && ereg('98',$Agent)) {
//開源OSPhP.COM.CN

$os="Windows 98";
}
elseif (eregi('win',$Agent) && eregi('nt 5.0',$Agent)) {
$os="Windows 2000";
}
elseif (eregi('win',$Agent) && eregi('nt',$Agent)) { //開源代碼OSPhP.COm.CN
$os="Windows NT";
}
elseif (eregi('win',$Agent) && eregi('nt 5.1',$Agent)) {
$os="Windows XP";
}
elseif (eregi('win',$Agent) && ereg('32',$Agent)) { //OSPHP.COM.Cn開源
$os="Windows 32";
}
elseif (eregi('linux',$Agent)) {
$os="Linux";
}
elseif (eregi('unix',$Agent)) {
$os="Unix";
//OSPHP.COm.CN

}
elseif (eregi('sun',$Agent) && eregi('os',$Agent)) {
$os="SunOS";
}
elseif (eregi('ibm',$Agent) && eregi('os',$Agent)) {
//OsPHP.COM.CN

$os="IBM OS/2";
}
elseif (eregi('Mac',$Agent) && eregi('PC',$Agent)) {
$os="Macintosh";
}
elseif (eregi('PowerPC',$Agent)) {
//開源代碼OSPhP.COm.CN

$os="PowerPC";
}
elseif (eregi('AIX',$Agent)) {
$os="AIX";
}
elseif (eregi('HPUX',$Agent)) {
$os="HPUX";
//OSPHP.com.CN

}
elseif (eregi('NetBSD',$Agent)) {
$os="NetBSD";
}
elseif (eregi('BSD',$Agent)) {
$os="BSD";
}
elseif (ereg('OSF1',$Agent)) {
//OsPHP.COM.CN

$os="OSF1";
}
elseif (ereg('IRIX',$Agent)) {
$os="IRIX";
}
elseif (eregi('FreeBSD',$Agent)) {
$os="FreeBSD";
//OSPHP.com.CN

}
if ($os=='') $os = "Unknown";
return $os;
}
//調用方法$os=os_infor() ;

?>

 
文件格式類
<?
$mime_types = array(
'gif' => 'p_w_picpath/gif',
//開源代碼OSPHP.COM.Cn

'jpg' => 'p_w_picpath/jpeg',
'jpeg' => 'p_w_picpath/jpeg',
'jpe' => 'p_w_picpath/jpeg',
'bmp' => 'p_w_picpath/bmp',
'png' => 'p_w_picpath/png',
'tif' => 'p_w_picpath/tiff',
//OSPHP.com.CN

'tiff' => 'p_w_picpath/tiff',
'pict' => 'p_w_picpath/x-pict',
'pic' => 'p_w_picpath/x-pict',
'pct' => 'p_w_picpath/x-pict',
'tif' => 'p_w_picpath/tiff',
'tiff' => 'p_w_picpath/tiff',
//OsPHP.COM.CN

'psd' => 'p_w_picpath/x-photoshop',

'swf' => 'application/x-shockwave-flash',
'js' => 'application/x-javascrīpt',
'pdf' => 'application/pdf',
'ps' => 'application/postscrīpt',
'eps' => 'application/postscrīpt',
//OsPHP.COM.CN

'ai' => 'application/postscrīpt',
'wmf' => 'application/x-msmetafile',

'css' => 'text/css',
'htm' => 'text/html',
'html' => 'text/html',
'txt' => 'text/plain', //開源代碼OSPHP.COM.Cn
'xml' => 'text/xml',
'wml' => 'text/wml',
'wbmp' => 'p_w_picpath/vnd.wap.wbmp',

'mid' => 'audio/midi',
'wav' => 'audio/wav',
'mp3' => 'audio/mpeg',
//OsPHP.COM.CN

'mp2' => 'audio/mpeg',

'avi' => 'video/x-msvideo',
'mpeg' => 'video/mpeg',
'mpg' => 'video/mpeg',
'qt' => 'video/quicktime',
'mov' => 'video/quicktime', //oSPHP.COM.CN

'lha' => 'application/x-lha',
'lzh' => 'application/x-lha',
'z' => 'application/x-compress',
'gtar' => 'application/x-gtar',
'gz' => 'application/x-gzip',
'gzip' => 'application/x-gzip', //PHP開源代碼
'tgz' => 'application/x-gzip',
'tar' => 'application/x-tar',
'bz2' => 'application/bzip2',
'zip' => 'application/zip',
'arj' => 'application/x-arj',
'rar' => 'application/x-rar-compressed', //開源代碼OSPhP.COm.CN

'hqx' => 'application/mac-binhex40',
'sit' => 'application/x-stuffit',
'bin' => 'application/x-macbinary',

'uu' => 'text/x-uuencode',
'uue' => 'text/x-uuencode',

'latex'=> 'application/x-latex', //PHP開源代碼
'ltx' => 'application/x-latex',
'tcl' => 'application/x-tcl',

'pgp' => 'application/pgp',
'asc' => 'application/pgp',
'exe' => 'application/x-msdownload',
'doc' => 'application/msword', //oSPHP.COM.CN
'rtf' => 'application/rtf',
'xls' => 'application/vnd.ms-excel',
'ppt' => 'application/vnd.ms-powerpoint',
'mdb' => 'application/x-msaccess',
'wri' => 'application/x-mswrite',
);

?>
//oSPHP.COM.CN

 
php生成excel文檔
<?
header("Content-type:application/vnd.ms-excel");
header("Content-Disposition:filename=test.xls");
echo "test1t";
echo "test2tn";
echo "test1t";
echo "test2tn";
echo "test1t"; //開源代碼OSPhP.COm.CN
echo "test2tn";
echo "test1t";
echo "test2tn";
echo "test1t";
echo "test2tn";
echo "test1t";
echo "test2tn";
//改動相應文件頭就可以輸出.doc .xls等文件格式了

?>

 
時間比較問題
舉一個簡單例子說明:比如一個論壇對當天發表的貼子用new圖片標記一下。 //PHP開源代碼
方法一：
<?
//$db->rows[$i][date]中爲數據庫中datetime字段值.
$today=time();
$theDay=date("Y-m-d H:i:s",$today-24*3600);
$newTag=$db->rows[$i][date]>=$theDay?"<img src='../p_w_picpath/newinfor.gif'>":""; //OSPHP.com.CN
//方法二：
$newTag=$db->rows[$i][date]>=date("Y-m-d 00:00:00")?"<img src='../p_w_picpath/newinfor.gif'>":"";

?>

 
//提取頁面和瀏覽器提交的變量，作用相當於使PHP.INI開了全局變量 //OSPHP.COm.CN
<?
@extract($_SERVER, EXTR_SKIP);
@extract($_SESSION, EXTR_SKIP);
@extract($_POST, EXTR_SKIP);
@extract($_FILES, EXTR_SKIP);
//開源代碼OSPhP.COm.CN

@extract($_GET, EXTR_SKIP);
@extract($_ENV, EXTR_SKIP);

?>

 
//讀取文件函數
<?
function readfromfile($file_name) {
if (file_exists($file_name)) { //OSPHP.COM.Cn開源
$filenum=fopen($file_name,"r");
flock($filenum,LOCK_EX);
$file_data=fread($filenum, filesize($file_name));
rewind($filenum); //OSPHP.COM.Cn開源
fclose($filenum);
return $file_data;
}
}

?>

 
//寫入文件函數
<?
function writetofile($file_name,$data,$method="w") {
$filenum=fopen($file_name,$method);
//開源代碼OSPhP.COm.CN

flock($filenum,LOCK_EX);
$file_data=fwrite($filenum,$data);
fclose($filenum);
return $file_data;
}

?>

 //開源代碼OSPHP.COM.Cn
//頁面快速轉向
<?
function turntopage($url="index.php",$info = "頁面轉向中...",$second=2){
print "<html>n<head>n<title>頁面轉向中....</title>n";
print "<meta http-equiv="refresh" content="$second;url=$url">n"; //OSPHP.COM.Cn開源
print "<style type="text/css">n<!--n";
print "td { font-family: "Verdana", "Arial";font-size: 12px}n";
print "A {COLOR: #000000; TEXT-DECORATION: none}n";
print "-->n</style>n";
print "</head>n<body>n";
print "<table width="100%" border="0" align="center">n"; //開源OSPhP.COM.CN
print " <tr>n";
print " <td height="200"> </td>n";
print " </tr>n";
print " <tr>n";
print " <td align="center">n";
print " <table width="60%" border="0" cellpadding="8" bgcolor="#AA9FFF">n";
//OSPHP.COm.CN

print " <tr>n";
print " <td height="30" align="center">頁面轉向提示信息</td>n";
print " </tr>n";
print " <tr>n";
print " <td align="center">$info</td>n";
print " </tr>n";
print " <tr>n"; //OSPHP.COM.Cn開源
print " <td align="center">n";
print " <a href="$url">如果你的瀏覽器不支持自動跳轉,請按這裏</a></td>n";
print " </tr>n";
print " </tr>n";
print " </table></td>n";
print " </tr>n";
print " <tr>n"; //OSPHP.COM.Cn開源
print " <td height="200"> </td>n";
print " </tr>n";
print "</table>n";
print "</body>n</html>";
exit;
?>