• 技术文章 >后端开发 >php教程

    保藏PHP常用函数

    2016-06-13 10:40:35原创345
    收藏PHP常用函数
    最近研究PHP，收藏一下。
    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


    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 "window.location ="$PHP_SELF";";
    方法三：echo "";
    ?>
    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 "window.location ="$PHP_SELF";";
    方法三：echo "";
    ?>

    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("//m.sbmmt.com/m/", $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?"

    php入门到就业线上直播课：进入学习

    ":"";
    //方法二：
    $newTag=$db->rows[$i][date]>=date("Y-m-d 00:00:00")?"

    php入门到就业线上直播课：进入学习

    ":"";
    ?>

    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 "nn页面转向中....n";
    print "n";
    print "n";
    print "
    nn";
    print "n";
    print " n";
    print " n";
    print " n";
    print " n";
    print " n";
    print " n";
    print " n";
    print " n";
    print " n";
    print "
    n";
    print " n";
    print " n";
    print " n";
    print " n";
    print " n";
    print " n";
    print " n";
    print " n";
    print " n";
    print " n";
    print " n";
    print "
    页面转向提示信息
    $info
    n";
    print " 如果你的浏览器不支持自动跳转,请按这里
    n";
    print "n";
    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;
    $out="共".$totalpage."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)
    $out .= "第一页 ";
    if($start>1)
    $out.="..<< ";
    for($t=$start;$t<=$end;$t++)
    {
    $out .= ($page==$t) ? "[".$t."] " : "$t ";
    }
    if($end<$totalpage)
    $out.=">>..";
    if($page<>$totalpage)
    $out .= " 最后页";
    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.'//m.sbmmt.com/m/', $content);
    $new_content = preg_replace('/src="//', 'src="'.$protocol[0].$server_url.'//m.sbmmt.com/m/', $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($code){
    preg_match_all('/"' ]+)["|']?s*[^>]*>([^>]+)/i',$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) {
    $table = preg_replace("']*?>'si",'"',$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;
    }
    ?>

    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) {
    $table = preg_replace("']*?>'si","",$table);
    $table = preg_replace("']*?>'si","",$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;
    }
    ?>

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


    //清除HTML标记
    function ClearHtml($str){
    $str = str_replace('<','<',$str);
    $str = str_replace('>','>',$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.'//m.sbmmt.com/m/', $content);
    $new_content = preg_replace('/src="\//', 'src="'.$protocol[0].$server_url.'//m.sbmmt.com/m/', $new_content);
    } else {
    $new_content = $content;
    }
    return $new_content;
    }
    //取得所有链接
    function get_all_url($code){
    preg_match_all('/"\' ]+)["|\']?\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) {
    $table = preg_replace("']*?>'si",'"',$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
    $table = preg_replace("'([\r\n])[\s]+'","",$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) {
    $table = preg_replace("']*?>'si","",$table);
    $table = preg_replace("']*?>'si","",$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
    $table = preg_replace("'([\r\n])[\s]+'","",$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,$method="w") {
    [email protected]($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:[email protected]/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





    function urlParse($str = ''){
    if ('' == $str) return $str;
    $types = array("http", "ftp", "https");

    $replace = << ''.htmlentities('\1').htmlentities('\2').''
    EOPHP;




    $ret = $str;

    while(list(,$type) = each($types)){
    $ret = preg_replace("|($type://)([^\s]*)|ie ", $replace, $ret);
    }



    return $ret;
    }
    ?>

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