收藏PHP常用函数

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出处：php源码网-开源程序大全(Open Source)

内容：

<?

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;

}

?>

详细出处参考：http://www.jb51.net/article/22199.htm

<?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']));

}

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]));

}

?>

详细出处参考：http://www.jb51.net/article/22199.htm

<?

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;

}

详细出处参考：http://www.jb51.net/article/22199.htm

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;

}

?>

详细出处参考：http://www.jb51.net/article/22199.htm

<?

方法一：header("Location: index.php");

方法二：echo "<scrīpt>window.location ="$PHP_SELF";</scrīpt>";

方法三：echo "<META HTTP-EQUIV="Refresh" CONTENT="0; URL=index.php">";

?>

详细出处参考：http://www.jb51.net/article/22199.htm

PHP重定向

复制代码 代码如下:

<?

方法一：header("Location: index.php");

方法二：echo "<scrīpt>window.location ="$PHP_SELF";</scrīpt>";

方法三：echo "<META HTTP-EQUIV="Refresh" CONTENT="0; URL=index.php">";

?>

获取访问者浏览器

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<=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

?>

详细出处参考：http://www.jb51.net/article/22199.htm

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() ;

?>

详细出处参考：http://www.jb51.net/article/22199.htm

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',

);

?>

详细出处参考：http://www.jb51.net/article/22199.htm

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

?>

详细出处参考：http://www.jb51.net/article/22199.htm

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?"<img src='../image/newinfor.gif'>":"";

//方法二：

$newTag=$db->rows[$i][date]>=date("Y-m-d 00:00:00")?"<img src='../image/newinfor.gif'>":"";

?>

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);

?>

复制代码 代码如下:

//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;

}

}

?>

复制代码 代码如下:

//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;

}

?>

复制代码 代码如下:

//页面快速转向

<?

function turntopage($url="index.php",$info = "页面转向中...",$second=2){

print "<html>n<head>n<title>页面转向中....</title>n";

print "<meta http-equiv="refresh" content="$second;url=$url">n";

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";

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";

print " <tr>n";

print " <td height="30" align="center">页面转向提示信息</td>n";

print " </tr>n";

print " <tr>n";

print " <td align="center">$info</td>n";

print " </tr>n";

print " <tr>n";

print " <td align="center">n";

print " <a href="$url">如果你的浏览器不支持自动跳转,请按这里</a></td>n";

print " </tr>n";

print " </tr>n";

print " </table></td>n";

print " </tr>n";

print " <tr>n";

print " <td height="200"> </td>n";

print " </tr>n";

print "</table>n";

print "</body>n</html>";

exit;

?>

产生随机字符串函数

复制代码 代码如下:

<?

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;

}

?>

截取一定长度的字符串（该函数对GB2312使用有效）

复制代码 代码如下:

<?

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;

}

?>

取得客户端IP地址

代码如下:

<?

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);

}

?>

判断邮箱地址

代码如下:

<?

function checkEmail($inAddress)

{

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

}

?>

分页（两个函数配合使用）

代码如下:

<?

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;

$out="共<font ".$totalpage."color=@#red@#><b>".$totalpage."</b></font>页 ";

$linkNum =4;

$start = ($page-round($linkNum/2))>0 ? ($page-round($linkNum/2)) : "1";

$end = ($page+round($linkNum/2))<$totalpage ? ($page+round($linkNum/2)) : $totalpage;

$prestart=$start-1;

$nextend=$end+1;

if($page<>1)

$out .= "<a href=@#?page=1&&".$string."@#title=第一页>第一页</a> ";

if($start>1)

$out.="<a href=@#?page=".$prestart."@# title=上一页>..<<</a> ";

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

{

$out .= ($page==$t) ? "<font [".$t."]color=@#red@#><b>[".$t."]</b></font> " : "<a $thref=@#?page=$t&&".$string."@#>$t</a> ";

}

if($end<$totalpage)

$out.="<a href=@#?page=".$nextend."&&".$string."@# title=下一页>>>..</a>";

if($page<>$totalpage)

$out .= " <a href=@#?page=".$totalpage."&&".$string."@# title=最后页>最后页</a>";

return $out;

}

?>

获取新插入数据的ID

复制代码 代码如下:

<?

mysql_insert_id();

?>

代码如下:

//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;

}

?>

代码如下:

//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;

}

?>

代码如下:

//去除HTML标记

<?

function Text2Html($txt){

$txt = str_replace(" ","　",$txt);

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

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

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

rn",$txt);

return $txt;

}

?>

代码如下:

//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;

}

?>

复制代码 代码如下:

//取得所有链接

<?

function get_all_url($code){

preg_match_all('/<as+href=["|']?([^>"' ]+)["|']?s*[^>]*>([^>]+)</a>/i',$code,$arr);

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

}

?>

复制代码 代码如下:

//HTML表格的每行转为CSV格式数组

<?

function get_tr_array($table) {

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

$table = str_replace("</td>",'",',$table);

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

//去掉 HTML 标记

$table = preg_replace("'<[/!]*?[^<>]*?>'si","",$table);

//去掉空白字符

$table = preg_replace("'([rn])

展开收缩
+'","",$table);

$table = str_replace(" ","",$table);

$table = str_replace(" ","",$table);

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

array_pop($table);

return $table;

}

?>

复制代码 代码如下:

//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);

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

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

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

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

//去掉 HTML 标记

$table = preg_replace("'<[/!]*?[^<>]*?>'si","",$table);

//去掉空白字符

$table = preg_replace("'([rn])

展开收缩
+'","",$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;

}

?>

复制代码 代码如下:

//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];

}

?>

复制代码 代码如下:

//打印出为本PHP项目做出贡献的人员的清单

<?

string phpcredits(void)

?>

//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;

}

//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;

}

//去除HTML标记

function Text2Html($txt){

$txt = str_replace(" ","　",$txt);

$txt = str_replace("<","&lt;",$txt);

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

$txt = preg_replace("/[\r\n]{1,}/isU","<br/>\r\n",$txt);

return $txt;

}

//清除HTML标记

function ClearHtml($str){

$str = str_replace('<','&lt;',$str);

$str = str_replace('>','&gt;',$str);

return $str;

}

//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;

}

//取得所有链接

function get_all_url($code){

preg_match_all('/<a\s+href=["|\']?([^>"\' ]+)["|\']?\s*[^>]*>([^>]+)<\/a>/i',$code,$arr);

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

}

//获取指定标记中的内容

function get_tag_data($str, $start, $end){

if ( $start == '' || $end == '' ){

return;

}

$str = explode($start, $str);

$str = explode($end, $str[1]);

return $str[0];

}

//HTML表格的每行转为CSV格式数组

function get_tr_array($table) {

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

$table = str_replace("</td>",'",',$table);

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

//去掉 HTML 标记

$table = preg_replace("'<[\/\!]*?[^<>]*?>'si","",$table);

//去掉空白字符

$table = preg_replace("'([\r\n])[\s]+'","",$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);

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

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

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

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

//去掉 HTML 标记

$table = preg_replace("'<[\/\!]*?[^<>]*?>'si","",$table);

//去掉空白字符

$table = preg_replace("'([\r\n])[\s]+'","",$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;

}

//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];

}

//文件读取函式

function PHP_Read($file_name) {

$fd=fopen($file_name,r);

while($bufline=fgets($fd, 4096)){

$buf.=$bufline;

}

fclose($fd);

return $buf;

}

?>

文件写入函式

//文件写入函式

function PHP_Write($file_name,$data,$method="w") {

$filenum=@fopen($file_name,$method);

flock($filenum,LOCK_EX);

$file_data=fwrite($filenum,$data);

fclose($filenum);

return $file_data;

}

?>

静态页面生成函式

//静态页面生成函式

function phptohtm($filefrom,$fileto,$u2u=1){

if($u2u==1){

$data=PHP_Read($filefrom);

}else{

$data=$filefrom;

}

PHP_Write($fileto,$data);

return true;

}

?>

指定条件信息数量检索函式

//指定条件信息数量检索函式

function rec_exist($table,$where){

$query="select count(*) as num from $table ".$where;

$result=mysql_query($query) or die(nerror(1));

$rowcount=mysql_fetch_array($result);

$num=$rowcount["num"];

if ($num==0){

return false;

}

return $num;

}

?>

目录删除函式

//目录删除函式

function del_DIR($directory){

$mydir=dir($directory);

while($file=$mydir->read()){

if((is_dir("$directory/$file")) AND ($file!=".") AND ($file!="..")){

del_DIR("$directory/$file");

}else{

if(($file!=".") AND ($file!="..")){

unlink("$directory/$file");

//echo "unlink $directory/$file ok ";

}

}

}

$mydir->close();

rmdir($directory);

//echo "rmdir $directory ok ";

}

?>

目录名称合法性检测函式

//目录名称合法性检测

function isen($str){

$ret="";

for($i=0;$i $p=ord(substr($str,$i,1));

if(($p<48 & $p!=45 & $p!=46) || ($p>57 & $p<65) || ($p>90 & $p<97 & $p!=95) || $p>122){

nerror("不符合规范！");

}

$ret.=chr($p);

}

return $ret;

}

?>

分页函式

//分页函式

function splitlist($HALT,$LRLIST,$ECHOCNT,$paper,$table,$where,$page_id,$userid){

global $splitstr,$sumcnt;

if($paper=="" || $sumcnt==""){

$query = "select count(*) as num from $table $where";

$result = mysql_query($query);

$row = mysql_fetch_array($result);

$sumcnt=$row["num"];

if($sumcnt==0){

nerror("该版内还没有选择发布新闻 ！");

}

$paper=1;

}

$sumpaper=($sumcnt-$sumcnt%$ECHOCNT)/$ECHOCNT;

if(($sumcnt%$ECHOCNT)!=0) $sumpaper+=1;

if($sumpaper==1 && $HALT==0) return($where);

$enwhere=base64_encode(base64_encode($where));

if(($LRLIST*2+1) < $sumpaper){

if(($paper-$LRLIST) < 2){

$tract=1;

$sub=$LRLIST*2+1;

}else if(($paper+$LRLIST) >= $sumpaper){

$tract=$sumpaper-($LRLIST*2);

$sub=$sumpaper;

}else{

$tract=$paper-$LRLIST;

$sub=$paper+$LRLIST;

}

}else{

$tract=1;

$sub=$sumpaper;

}

$uppaper=$paper-1;

$downpaper=$paper+1;

$startcnt=($paper-1)*$ECHOCNT;

$where.=" limit ${ startcnt },${ ECHOCNT }";

if($tract > 1) { $splitstr="【 << "; }

else $splitstr="【 << ";

for($i=$tract;$i<=$sub;$i++){

if ($i!=$paper) $splitstr.="".$i." ";

else $splitstr.="".$i." ";

}

if ($sub!=$sumpaper) $splitstr.=">> 】";

else $splitstr.=">> 】";

return($where);

}

?>

关于分页函式的使用说明

/*

#### 检索分页函式 ####

Int $HALT - 检索结果仅分1页时是否(1/0)显示页码条

Int $LRLIST - (页码条显示页码数-1)/2

Int $ECHOCNT - 检索时每页显示记录的数量

Int $paper - 页数，预提取：$paper=$HTTP_GET_VARS[paper];

Varchar $table - 数据表名,预附值：$table="db.table";

Varchar $where - 检索条件，预附值：$where="where field='value'";

Varchar $enwhere - 将原$where进行两次base64_encode()编码后以GET的方式提交

Varchar $splitstr - 页码条输出字串，执行函式后在相应的位置执行 echo $splitstr;

函式调用前需获取变量 -

$paper=$HTTP_GET_VARS[paper];

$sumcnt=$HTTP_GET_VARS[sumcnt];

$enwhere=$HTTP_GET_VARS[enwhere];

Return (Varchar $where) - 分页后检索语句的检索条件

注意：本函式需调用出错处理函式 nerror($error);

*/

图片文件上传函式

//图片文件上传函式

function upload_img($UploadFile,$UploadFile_name,$UploadFile_size,$UploadPath,$max_size=64){

//$TimeLimit=60; //设置超时限制时间 缺省时间为 30秒 设置为0时为不限时

//set_time_limit($TimeLimit);

if(($UploadFile!= "none" )&&($UploadFile != "" )){

$FileName=$UploadPath.$UploadFile_name;

if($UploadFile_size <1024){

$FileSize="(string)$UploadFile_size" . "字节";

}elseif($UploadFile_size <(1024 * $max_size)){

$FileSize=number_format((double)($UploadFile_size / 1024), 1) . " KB";

}else{

nerror("文件超过限制大小！");

}

//{

//$FileSize="number_format((double)($UploadFile_size" / (1024 * 1024)), 1) . " MB";

// }

if(!file_exists($FileName)){

if(copy($UploadFile,$FileName)){

return "$UploadFile_name ($FileSize)";

}else{

nerror("文件 $UploadFile_name 上载失败！");

}

unlink($UploadFile);

}else{

nerror("文件 $UploadFile_name 已经存在！");

}

//set_time_limit(30); //恢复缺省超时设置

}

}

如何判断ip地址合法性

if(!strcmp(long2ip(sprintf("%u",ip2long($ip))),$ip)) echo "is ipn";

----

email的正则判断

eregi("^[_.0-9a-zA-Z-]+@([0-9a-zA-Z][0-9a-zA-Z_-]+.)+[a-zA-Z]$", $email);

检测ip地址和mask是否合法的例子

$ip = '192.168.0.84';

$mask = '255.255.255.0';

$network = '192.168.0';

$ip = ip2long($ip);

$mask = ip2long($mask);

$network = ip2long($network);

if( ($ip & $mask) == $network) echo "valid ip and maskn";

?>

----

文件下载头部输出如何设定

header("Content-type: application/x-download");

header("Content-Disposition: attachment; filename=$file_download_name;");

header("Accept-Ranges: bytes");

header("Content-Length: $download_size");

echo 'xxx'

用header输出ftp下载方式,并且支持断点续传

一个例子:

header('Pragma: public');

header('Cache-Control: private');

header('Cache-Control: no-cache, must-revalidate');

header('Accept-Ranges: bytes');

header('Connection: close');

header("Content-Type: audio/mpeg");

header("Location:ftp://download:1bk3l4s3k9s2@232.2.22.22/2222/web技术开发知识库/cn_web.rmvb");

正则匹配中文

ereg("^[".chr(0xa1)."-".chr(0xff)."]+$", $str);

批量替换文本里面的超级链接

<?php

function urlParse($str = ''){

if ('' == $str) return $str;

$types = array("http", "ftp", "https");

$replace = <<<EOPHP

'<a href="'.htmlentities('\1').htmlentities('\2').'">'.htmlentities('\1').htmlentities('\2').'</a>'

EOPHP;

$ret = $str;

while(list(,$type) = each($types)){

$ret = preg_replace("|($type://)([^\s]*)|ie ", $replace, $ret);

}

return $ret;

}

?>

企鹅博客
  • 本文由 发表于 2020年6月16日 08:52:23
  • 转载请务必保留本文链接：https://www.qieseo.com/232552.html

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