php+常用函数总结,php常用函数总结

1.获取IP

2.时间的增加

3.检查日期是否合法日期

4.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

5.PHP重定向

6.获取访问者浏览器

7.获取访问者操作系统

8.文件格式类

9.php生成excel文档

10.时间比较问题

11.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

12.读取文件函数

13.写入文件函数

14.页面快速转向

15.产生随机字符串函数

16.截取一定长度的字符串(该函数对GB2312使用有效)

17.取得客户端IP地址

18.判断邮箱地址

19.分页(两个函数配合使用)

20.获取新插入数据的ID

21.获得当前的脚本网址

22.把全角数字转为半角数字

23.去除HTML标记

24.相对路径转化成绝对路径

26.取得所有链接

27.HTML表格的每行转为CSV格式数组

28.将HTML表格的每行每列转为数组，采集表格数据

29.返回字符串中的所有单词 $distinct=true 去除重复

30.打印出为本PHP项目做出贡献的人员的清单

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;

}

?>

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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']));

}

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]));

}

?>

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

&& $timeArr[1] <= 59) && ($timeArr[2] >= 0 && $timeArr[2] <= 59))

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;

}

?>

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PHP重定向

方法一：header("Location: index.php");

方法二：echo "window.location ="$PHP_SELF";";

方法三：echo "";

?>

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获取访问者浏览器

function browse_infor()

{

$browser="";$browserver="";

$Browsers =array

("Lynx","MOSAIC","AOL","Opera","JAVA","MacWeb","WebExplorer","OmniWe

b");

$Agent = $GLOBALS["HTTP_USER_AGENT"];

for ($i=0; $i<=7; $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

?>

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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)) {

$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() ;

?>

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文件格式类

$mime_types = array(

'gif' => 'p_w_picpath/gif',

'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',

'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',

'psd' => 'p_w_picpath/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' => 'p_w_picpath/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',

);

?>

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php生成excel文档

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

?>

{downsource}

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：

//$db->rows[$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?"

src='../p_w_picpath/newinfor.gif'>":"";

//方法二：

$newTag=$db->rows[$i][date]>=date("Y-m-d 00:00:00")?"

src='../p_w_picpath/newinfor.gif'>":"";

?>

{downsource}

//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);

?>

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//读取文件函数

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;

}

}

?>

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//写入文件函数

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;

}

?>

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//页面快速转向

function turntopage($url="index.php",$info = "页面转向

中...",$second=2){

print "n

n页面转向中....n";

print "n";

print "

print "td { font-family: "Verdana", "Arial";font-size: 12px}n";

print "A {COLOR: #000000; TEXT-DECORATION: none}n";

print "-->nn";

print "n

n";

print "

print "

n";

print "

n";

print "

n";

print "

n";

print "

n";

print "

bgcolor="#AA9FFF">n";

print "

n";

print "

页面转向提示信息n";

print "

n";

print "

n";

print "

$infon";

print "

n";

print "

n";

print "

n";

print " 如果你的浏览器不支持自动跳转,请按这里

n";

print "

n";

print " n";

print "

n";

print "

n";

print "

n";

print "

n";

print "

n";

print "

n";

print "n";

exit;

?>

{downsource}

产生随机字符串函数

function random($length) {

$hash = @#@#;

$chars =

@#ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz@#;

$max = strlen($chars) - 1;

mt_srand((double)microtime() * 1000000);

for($i = 0; $i < $length; $i++) {

$hash .= $chars[mt_rand(0, $max)];

}

return $hash;

}

?>

{downsource}

截取一定长度的字符串(该函数对GB2312使用有效)

function Wordscut($string, $length ,$sss=0) {

if(strlen($string) > $length) {

if($sss){

$length=$length - 3;

$addstr=@# ...@#;

}

for($i = 0; $i < $length; $i++) {

if(ord($string[$i]) > 127) {

$wordscut .= $string[$i].$string[$i + 1];

$i++;

} else {

$wordscut .= $string[$i];

}

}

return $wordscut.$addstr;

}

return $string;

}

?>

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取得客户端IP地址

function GetIP(){

if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv

("HTTP_CLIENT_IP"), "unknown"))

$ip = getenv("HTTP_CLIENT_IP");

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);

}

?>

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判断邮箱地址

function checkEmail($inAddress)

{

return (ereg("^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-])

+",$inAddress));

}

?>

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分页(两个函数配合使用)

function getpage($sql,$page_size=20)

{

global $page,$totalpage,$sums; //out param

$page = $_GET["page"];

//$eachpage = $page_size;

$pagesql = strstr($sql," from ");

$pagesql = "select count(*) as ids ".$pagesql;

$result = mysql_query($pagesql);

if($rs = mysql_fetch_array($result)) $sums = $rs[0];

$totalpage = ceil($sums/$page_size);

if((!$page)($page<1)) $page=1;

$startpos = ($page-1)*$page_size;

$sql .=" limit $startpos,$page_size ";

return $sql;

}

function showbar($string="")

{

global $page,$totalpage;

$out="共

".$totalpage."[email=color=@#red@#]color=@#red@#>".$totalpage."

页 ";

$linkNum =4;

$start = ($page-round($linkNum/2))>0 ? ($page-round($linkNum/2)) :

"1";

$end = ($page+round($linkNum/2))

($linkNum/2)) : $totalpage;

$prestart=$start-1;

$nextend=$end+1;

if($page<>1)

$out .= "第一页 ";

if($start>1)

$out.="..<< ";

for($t=$start;$t<=$end;$t++)

{

$out .= ($page==$t) ? "[".$t."]

" : "$t ";

}

if($end

$out.="

>>>..

";

if($page<>$totalpage)

$out .= "

页>最后页

";

return $out;

}

?>

{downsource}

获取新插入数据的ID

mysql_insert_id();

?>

{downsource}

//获得当前的脚本网址

function get_php_url(){

if(!empty($_server["REQUEST_URI"])){

$scriptName = $_SERVER["REQUEST_URI"];

$nowurl = $scriptName;

}else{

$scriptName = $_SERVER["PHP_SELF"];

if(empty($_SERVER["QUERY_STRING"])) $nowurl = $scriptName;

else $nowurl = $scriptName."?".$_SERVER["QUERY_STRING"];

}

return $nowurl;

}

?>

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//把全角数字转为半角数字

function GetAlabNum($fnum){

$nums = array("０","１","２","３","４","５","６","７","８","９");

$fnums = "0123456789";

for($i=0;$i<=9;$i++) $fnum = str_replace($nums[$i],$fnums

[$i],$fnum);

$fnum = ereg_replace("[^0-9.]|^0{1,}","",$fnum);

if($fnum=="") $fnum=0;

return $fnum;

}

?>

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//去除HTML标记

function Text2Html($txt){

$txt = str_replace(" ","　",$txt);

$txt = str_replace("

$txt = str_replace(">",">",$txt);

$txt = preg_replace("/[rn]{1,}/isU","

rn",$txt);

return $txt;

}

?>

{downsource}

//相对路径转化成绝对路径

function relative_to_absolute($content, $feed_url) {

preg_match('/(http|https|ftp):///', $feed_url, $protocol);

$server_url = preg_replace("/(http|https|ftp|news):///", "",

$feed_url);

$server_url = preg_replace("//.*/", "", $server_url);

if ($server_url == '') {

return $content;

}

if (isset($protocol[0])) {

$new_content = preg_replace('/href="//', 'href="'.$protocol

[0].$server_url.'/', $content);

$new_content = preg_replace('/src="//', 'src="'.$protocol

[0].$server_url.'/', $new_content);

} else {

$new_content = $content;

}

return $new_content;

}

?>

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//取得所有链接

function get_all_url($code){

preg_match_all('/"' ]+)["|']?s*[^>]*>([^>]+)

/i',$code,$arr);

return array('name'=>$arr[2],'url'=>$arr[1]);

}

?>

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//HTML表格的每行转为CSV格式数组

function get_tr_array($table) {

$table = preg_replace("'

]*?>'si",'"',$table);

$table = str_replace("

",'",',$table);

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

//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;

}

?>

{downsource}

//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 = preg_replace("'

]*?>'si","",$table);

$table = preg_replace("'

]*?>'si","",$table);

$table = str_replace("

","{tr}",$table);

$table = str_replace("","{td}",$table);

//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);

foreach ($table as $key=>$tr) {

$td = explode('{td}', $tr);

array_pop($td);

$td_array[] = $td;

}

return $td_array;

}

?>

{downsource}

//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]);

return $match[1];

}

?>

{downsource}

//打印出为本PHP项目做出贡献的人员的清单

string phpcredits(void)

?>

//生成随机密码

function randStr($len=6)

{

//用来产生密码的字符串

$chars='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijkmnpqrstuvwxyz23456789';

$password="";

while(strlen($password)

$password.=substr($chars,(mt_rand()%strlen($chars)),1);

return $password;

}