php专业的身份证验证，不用正则验证身份证

  <form action="add.php" method="post" >
   新闻标题：
  <input type="text" name="title" /><br>
  新闻内容：<br>
  <textarea name="content" rows="10" cols="50" >

  </textarea><br>

  <input type="submit" name="submit" value="提交"/>

  </form>

<?php
require_once("mysql_inc.php"); //引用conn.php，连接数据库

$title=$_POST['title'];
$content=$_POST['content']; //获得表单变量

//以下建立一文本文档，其值自动计数
$countfile="count.txt";
if(!file_exists($countfile))
{
fopen($countfile,"w"); //如果此文件不存在，则自动建立一个
}
$fp=fopen($countfile,"r");
$num=fgets($fp,20);
$num=$num+1; //每次其值自动加一
fclose($fp);
$fp=fopen($countfile,"w");
fwrite($fp,$num); //更新其值
fclose($fp);

//利用上面自动计数的值获得HTML的路径$path
$houzui=".html";
$path=$num.$houzui;
//这样形成的路径是自动增长的，如1.html,2.html,3.html……….添加一条新闻便自动加上1

//以下用SQL语句添加数据至表 news
$sql="insert into news (id,title,content,path) values ('','".$title."','".$content."','".$path."')";
$query=mysql_query($sql);

//以下为关键之处，把从表单获得的数据替换模板中的{title},{content}标记
$fp=fopen("mode.html","r"); //只读打开模板
$str=fread($fp,filesize("mode.html"));//读取模板中内容
$str=str_replace("{title}",$title,$str);
$str=str_replace("{content}",$content,$str);//替换内容
fclose($fp);

$handle=fopen($path,"w"); //写入方式打开新闻路径
fwrite($handle,$str); //把刚才替换的内容写进生成的HTML文件
fclose($handle);

//收尾工作:
echo "<a href=$path target=_blank>查看刚才添加的新闻</a>";

<?php
   class mysql{

     private $host;//�����
     private $name;//�û���
     private $pass;//����
     private $database;//��ݿ���
     private $ut;//���뷽ʽ

     function __construct($host,$name,$pass,$database,$ut){
      $this->host=$host;
      $this->name=$name;
      $this->pass=$pass;
      $this->database=$database;
      $this->ut=$ut;
      $this->connect();

     }

     function connect(){
      $link=mysql_connect($this->host,$this->name,$this->pass) or die ($this->error());
      mysql_select_db($this->database,$link) or die("û����ݿ⣺".$this->database);
      mysql_query("SET NAMES '$this->ut'");
     }

 function query($sql, $type = '') {
     if(!($query = mysql_query($sql))) $this->show('Say:', $sql);
     return $query;
 }

    function show($message = '', $sql = '') {
  if(!$sql) echo $message;
  else echo $message.'<br>'.$sql;
 }

    function affected_rows() {
  return mysql_affected_rows();
 }

 function result($query, $row) {
  return mysql_result($query, $row);
 }

 function num_rows($query) {
  return @mysql_num_rows($query);
 }

 function num_fields($query) {
  return mysql_num_fields($query);
 }

 function free_result($query) {
  return mysql_free_result($query);
 }

 function insert_id() {
  return mysql_insert_id();
 }

 function fetch_row($query) {
  return mysql_fetch_row($query);
 }

 function version() {
  return mysql_get_server_info();
 }

 function close() {
  return mysql_close();
 }

      function htmtocode($content){
     $content=str_replace("n","<br>",str_replace(" ","&nbsp",$content));
     return $content;
     }
   }

   $db=new mysql("localhost","root","","database","utf8");

?>

<?php
$discuz_url = 'http://127.0.0.1/discuz/'; //论坛地址
$login_url = $discuz_url . 'logging.php?action=login'; //登录页地址

$post_fields = array();
//以下两项不需要修改
$post_fields['loginfield'] = 'username';
$post_fields['loginsubmit'] = 'true';
//用户名和密码，必须填写
$post_fields['username'] = 'tianxin';
$post_fields['password'] = '111111';
//安全提问
$post_fields['questionid'] = 0;
$post_fields['answer'] = '';
//@todo验证码
$post_fields['seccodeverify'] = '';

//获取表单FORMHASH
$ch = curl_init($login_url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$contents = curl_exec($ch);
curl_close($ch);
preg_match('/<inputs*type="hidden"s*name="formhash"s*value="(.*?)"s*/>/i', $contents, $matches);
if (!empty($matches)) {
    $formhash = $matches[1];
} else {
    die('Not found the forumhash.');
}

//POST数据，获取COOKIE,cookie文件放在网站的temp目录下
$cookie_file = tempnam('./temp', 'cookie');

$ch = curl_init($login_url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_fields);
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file);
curl_exec($ch);
curl_close($ch);

//取到了关键的cookie文件就可以带着cookie文件去模拟发帖,fid为论坛的栏目ID
$send_url = $discuz_url . "post.php?action=newthread&fid=2";

$ch = curl_init($send_url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file);
$contents = curl_exec($ch);
curl_close($ch);

//这里的hash码和登陆窗口的hash码的正则不太一样，这里的hidden多了一个id属性
preg_match('/<inputs*type="hidden"s*name="formhash"s*id="formhash"s*value="(.*?)"s*/>/i', $contents, $matches);
if (!empty($matches)) {
    $formhash = $matches[1];
} else {
    die('Not found the forumhash.');
}

$post_data = array();
//帖子标题
$post_data['subject'] = 'test2';
//帖子内容
$post_data['message'] = 'test2';
$post_data['topicsubmit'] = "yes";
$post_data['extra'] = '';
//帖子标签
$post_data['tags'] = 'test';
//帖子的hash码，这个非常关键！假如缺少这个hash码，discuz会警告你来路的页面不正确
$post_data['formhash'] = $formhash;

$ch = curl_init($send_url);
curl_setopt($ch, CURLOPT_REFERER, $send_url);       //伪装REFERER
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
$contents = curl_exec($ch);
curl_close($ch);

//清理cookie文件
unlink($cookie_file);
?>

<?php$cookie_file=tempnam('./temp','cookie');$login_url='/bbs/logging.php?action=login&amp;loginsubmit=yes';$post_fields='username=用户名&password=用户密码&referer=index.php&formhash=24eca8af&loginfield=username&questionid=0&loginsubmit=登录';$ch = curl_init($login_url);curl_setopt($ch,CURLOPT_HEADER,0);curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);curl_setopt($ch,CURLOPT_POST,1);curl_setopt($ch,CURLOPT_POSTFIELDS,$post_fields);curl_setopt($ch,CURLOPT_COOKIEJAR,$cookie_file);curl_exec($ch);curl_close($ch);$url='/bbs';$ch =curl_init($url);curl_setopt($ch,CURLOPT_HEADER,0);curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);curl_setopt($ch,CURLOPT_COOKIEFILE,$cookie_file);$contents=curl_exec($ch);echo $contents;curl_close($ch);?>

 /** 返回文件从X行到Y行的内容(支持php5、php4) 
 * @param string $filename 文件名
 * @param int $startLine 开始的行数
 * @param int $endLine 结束的行数
 * @return string
 */
function getFileLines($filename, $startLine = 1, $endLine=50, $method='rb') {
    $content = array();
    $count = $endLine - $startLine; 
    // 判断php版本（因为要用到SplFileObject，PHP>=5.1.0）
    if(version_compare(PHP_VERSION, '5.1.0', '>=')){
        $fp = new SplFileObject($filename, $method);
        $fp->seek($startLine-1);// 转到第N行, seek方法参数从0开始计数
        for($i = 0; $i <= $count; ++$i) {
            $content[]=$fp->current();// current()获取当前行内容
            $fp->next();// 下一行
        }
    }else{//PHP<5.1
        $fp = fopen($filename, $method);
        if(!$fp) return 'error:can not read file';
        for ($i=1;$i<$startLine;++$i) {// 跳过前$startLine行
            fgets($fp);
        }
        for($i;$i<=$endLine;++$i){
            $content[]=fgets($fp);// 读取文件行内容
        }
        fclose($fp);
    }
    return array_filter($content); // array_filter过滤：false,null,''
}  

echo '<pre>';
var_dump(getFileLines('test.php',35270,35280));
echo '</pre>'; 

function readBigFile($filename, $count = 20, $tag = "rn") {
$content = "";//最终内容
$current = "";//当前读取内容寄存
$step= 1;//每次走多少字符
$tagLen = strlen($tag);
$start = 0;//起始位置
$i = 0;//计数器
$handle = fopen($filename,'r+');//读写模式打开文件，指针指向文件起始位置
while($i < $count && !feof($handle)) {
fseek($handle, $start, SEEK_SET);//指针设置在文件开头
$current = fread($handle,$step);//读取文件
$content .= $current;//组合字符串
$start += $step;//依据步长向前移动
//依据分隔符的长度截取字符串最后免得几个字符
$substrTag = substr($content, -$tagLen);
if ($substrTag == $tag) { //判断是否为判断是否是换行或其他分隔符
$i++;
$content .= "<br />";
}
}
//关闭文件
fclose($handle);
//返回结果
return $content;
}
$filename = "csdn.sql";//需要读取的文件
$tag = "n";//行分隔符 注意这里必须用双引号
$count = 100;//读取行数
$data = readBigFile($filename,$count,$tag);
echo $data;

function msubstr($str, $start=0, $length, $charset="utf-8", $suffix=true)
    {
        if(function_exists("mb_substr"))
            return mb_substr($str, $start, $length, $charset);
        elseif(function_exists('iconv_substr')) {
            return iconv_substr($str,$start,$length,$charset);
        }
        $re['utf-8']   = "/[x01-x7f]|[xc2-xdf][x80-xbf]|[xe0-xef][x80-xbf]{2}|[xf0-xff][x80-xbf]{3}/";
        $re['gb2312'] = "/[x01-x7f]|[xb0-xf7][xa0-xfe]/";
        $re['gbk']    = "/[x01-x7f]|[x81-xfe][x40-xfe]/";
        $re['big5']   = "/[x01-x7f]|[x81-xfe]([x40-x7e]|xa1-xfe])/";
        preg_match_all($re[$charset], $str, $match);
        $slice = join("",array_slice($match[0], $start, $length));
        if($suffix) return $slice."…";
        return $slice;
    }

<?php
//$start：指定开始截取字符串的位置；$length指定截取字符的长度
function substr2($string, $start, $length)
{
$len = strlen($string);
if($len > $length)
{
   $str = '';
   $len1 = $start + $length; //截取到原字符串的位置
   for($i=$start; $i<$len1; $i++)
   {
    if(ord(substr($string, $i, 2)) > 0xa0) //在ASCII中，0xa0表示汉字的开始
    {
     $str.=substr($string, $i, 2);
     $i++;
    }
    else
    {
     $str.=substr($string, $i, 1);
    }
   }
   return $str.'...';
}
else
{
   return $string;
}
}

?>

<?php
function chinesesubstr($str, $start, $len){
   $strlen = $start + $len;
   for($i=0; $i<$strlen; $i++){
    if(ord(substr($str, $i, 1)) > 0xa0){
     $tmpstr .= substr($str, $i, 2);
     $i++;
    }else{
     $tmpstr .= substr($str, $i, 1);
    }
   }
   return $tmpstr;
}
$str = "waiting for you 等wait你back";
echo chinesesubstr($str, 0, 19)
?>