php 获取目录下所有文件实现代码

php教程 获取目录下所有文件实现代码
class a{   
 private $img_dir;
        private $img_path;
        private $face_files = array();
        private $allow_extension = array();

private function get_face_files()
        {
            $files = array();
            if(is_dir($this->img_dir))
            {
                if ($dh = opendir($this->img_dir))
                {
                    while (($file = readdir($dh)) !== false)
                    {
                        if($file == '.') continue;
                        if($file == '..') continue;
                        $fileinfo = explode('.', (basename($file)));
                        if(in_array($fileinfo[1], $this->allow_extension))
                        {
                            $files[] = array(
                                'filename' => $fileinfo[0],
                                'extension' => $fileinfo[1],
                            );
                        }
                    }
                    closedir($dh);
                }
            }
            return $files;
        }
}

php教程读取flash文件高宽帧数背景颜色代码

<?php
/*
示例：
  $file = '/data/ad_files/5/5.swf';
  $flash = new flash();
  $flash = $flash->getswfinfo($file);
  echo "
文件的宽高是:".$flash["width"].":".$info["height"];
  echo "
文件版本是".$flash["version"];
  echo "
文件帧数量是".$flash["framecount"];
  echo "
文件帧速率是".$flash["framerate"];
  echo "
文件背景颜色是".$flash["bgcolor"];
*/
class flash
{
  //是否返回背景色
  public $need_back_color = false ;
 
  //是否返回版本
  public $need_version = false ;
 
  //是否返回帧速率
  public $need_framerate = false ;
 
  //是否返回帧数量
  public $need_framecount = false ;

  public function __construct()
  {

  }

  public function getswfinfo( $filename )
  {
    if ( file_exists($filename) ) {
       //echo "文件的修改时间:".date("m d y h:i:s.", filemtime($filename))."
";
    } else {
       //echo "目标文件不存在!";
       return array( "error" => $filename ) ;
    }

    //打开文件
    $rs = fopen($filename,"r");
   
    //读取文件的数据
    $str = fread( $rs , filesize( $filename ) ) ;
    ///
    if($str[0] == "f")
    {
       //echo "
文件已是解压缩的文件:";
    } else {
       $first = substr($str,0,8);
       $last = substr($str,8);
       //
       $last = gzuncompress($last);
       //
       $str = $first . $last ;
       $str[0] = "f";
       //echo "
解压缩后的文件信息:";
    }

    $info = $this->getinfo( $str );
    fclose ( $rs ) ;
    return $info;
  }

  private function mydecbin($str,$index)
  {
    $fbin = decbin(ord($str[$index]));
    while(strlen($fbin)<8)$fbin="0".$fbin;
    return $fbin;
  }

  private function colorhex($data)
  {
    $tmp = dechex($data);
    if ( strlen($tmp)<2 ) {
      $tmp='0' . $tmp ;
    }
    return $tmp;
  }

  private function getinfo( $str )
  {
    //换算成二进制
    $fbin = $this->mydecbin( $str , 8 ) ;
   
    //计算rec的单位长度
    $slen = bindec( substr( $fbin , 0 , 5 ) );
   
    //计算rec所在的字节
    $recsize = $slen * 4 + 5 ;
    $recsize = ceil( $recsize / 8 ) ;

    //rec的二进制
    $recbin = $fbin ;
    for( $i = 9 ; $i < $recsize + 8 ; $i++ )
    {
       $recbin .= $this->mydecbin( $str ,$i );
    }

    //rec数据
    $rec = array();
    for( $i = 0 ; $i < 4 ; $i++ )
    {
       $rec[] = bindec( substr( $recbin , 5 + $i * $slen , $slen ) ) / 20 ;
    }
   
    if ( $this->need_back_color ) {
      //背景颜色
      for( $i = $recsize + 12 ; $i < strlen ( $str ) ; $i ++ )
      {
         if ( ord( $str[$i] ) == 67 && ord( $str[$i+1] ) == 2 )
         {
          $bgcolor = $this->colorhex(ord($str[$i+2])).$this->colorhex(ord($str[$i+3])).$this->colorhex(ord($str[$i+4]));
          break;
         }
      }
    }
   
    if ( $this->need_version ) {
      //版本
      $version = ord( $str[3] );
    }
    if ( $this->need_framerate ) {
      //帧速率
      $framerate = ord( $str[$recsize + 8] ) / 256 + ord( $str[$recsize + 9] ) ;
    }

    if ( $this->need_framecount ) {   
      //帧数量
      $framecount = ord( $str[$recsize + 11] ) * 256 + ord( $str[$recsize + 10] );
    }
   
    return  array ( "bgcolor" => $bgcolor ,
            "version" => $version ,
            "framerate" => $framerate ,
            "framecount" => $framecount ,
            'width'=>$rec[1],
            'height'=>$rec[3]
            );
  }
}

?>

php教程自动获取关键字代码

$mincipin=5;//最小词频

$minlen=4;//关键字最小长度

tiqukeyword($tiqustr,$minlen,$mincipin);

function tiqukeyword($tiqustr,$minlen,$mincipin)

{$strlong=strlen($tiqustr);

$arr=array();

$k=-1;

for($i=0;$i<($strlong-$mincipin*$minlen);$i++){

$end=ceil(($strlong-$i)/$mincipin+$i);

for($j=$minlen;$j<$end;$j++){$num=0;

if(($guanjianzi=substr($tiqustr,$i,$j))!==false){

$wz=$i+$j;

$num++;}

else{break;}

while($wz<$strlong){if(($wz=strpos($tiqustr,$guanjianzi,$wz))!==false)

{$num++;

$wz=$wz+strlen($guanjianzi);}

else break;

}

if($j==$minlen){

if($num>=$mincipin){$maxnum=$num;$k++;$str=substr($tiqustr,$i,$j);

$arr[$k]=array($i,$j,$str,$num,0);

}

else{break;}
}

else{

if($num>=$maxnum){

$maxnum=$num;

$str=substr($tiqustr,$i,$j);

$arr[$k]=array($i,$j,$str,$num,0);

}

else break;

}
}

}

echo '初步得到的数组：';

print_r($arr);

//echo '<br/><br/><br/><br/>';

 

$arrlong=count($arr);

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

$bjarr=$arr[$i];

$nowid=$i;

if($bjarr[4]==1)continue;

for($j=$i+1;$j<$arrlong;$j++){

if($arr[$j][4]==1)continue;

$qujianks=$bjarr[0];

$qujianjs=$bjarr[1]+$bjarr[0]-1;

$a=$arr[$j][0];

$b=$arr[$j][1]+$arr[$j][0]-1;

if(($bjarr[2]==$arr[$j][2])&&($bjarr[3]>$arr[$j][3]))$arr[$j][4]=1;

 

if($a<=$qujianks&&$qujianks<=$b&&$a<=$qujianjs&&$qujianjs<=$b)

{if($bjarr[3]<=$arr[$j][3]){

$arr[$nowid][4]=1;$nowid=$j;$bjarr=$arr[$j];
}
}

elseif($qujianks<=$a&&$a<=$qujianjs&&$qujianks<=$b&&$b<=$qujianjs){

$arr[$j][4]=1;
}

}

}

 

echo '<br/><br/><br/><br/>重叠加标记后的数组：';

print_r($arr);

 

$jieguoarr=array();

for($i=0;$i<$arrlong;$i++)

{if($arr[$i][4]==0)$jieguoarr[]=$arr[$i];

 

}

echo '<br/><br/><br/><br/>';

echo '最后得到的数组：';

print_r($jieguoarr);

}

 

类名 :httprequest($url="",$method="get",$usesocket=0)
//$url为请求的地址；默认请求方法为get；$usesocket默认为0，使用fsockopen方法，如果设置为1则使用socket_create方法

方法：
open($ip="",$port=-1) //打开同服务器的连接，默认不用设置这两个参数（一个同事在linux用的时候，请求的不是hostname解析的ip，因此加了这两个参数，以连接真实的服务器ip）
settimeout($timeout=0) //设置获取数据的超时时间，必须在send方法调用之前设置才有效,单位秒，默认值0为不限制
setrequestheader($key,$value="") //设置请求头，必须在send方法调用之前设置才有效
removerequestheader($key,$value="") //移除指定键值的请求头，必须在send方法调用之前调用才有效
send($data="") //发送数据$data到服务器
getresponsebody() //获取服务器返回的文本
getallresponseheaders() //获取服务器响应的所有头信息
getresponseheader($key) //获取服务器响应的某个头信息，例如server,set_cookie等

属性：
$url //要请求的url
$method //请求方法(post/get)
$port //请求的端口
$hostname //请求的主机名
$uri //url的文件部分
$protocol //请求协议(http)(包括本属性的以上5个属性均由程序自动通过url分析)
$excption //异常信息
$_headers=array() //请求头array("key"=>"value")
$_senddata //发送到服务器的数据
$status //返回的状态码
$statustext //状态信息
$httpprotocolversion //服务器的http协议版本

注意：
host头由程序自动设置，当用post方法请求时，content-length和content-type已被自动设置。
支持gzip压缩的页面

inc.http.php教程文件

<?php

class httprequest{
 public $url,$method,$port,$hostname,$uri,$protocol,$excption,$_headers=array(),$_senddata,$status,$statustext,$httpprotocolversion;
 private $fp=0,$_buffer="",$responsebody,$responseheader,$timeout=0,$usesocket;
 //构造函数
 function __construct($url="",$method="get",$usesocket=0){
  $this->url = $url;
  $this->method = strtoupper($method);
  $this->usesocket = $usesocket;
  $this->setrequestheader("accept","*/*");
  $this->setrequestheader("accept-language","zh-cn");
  $this->setrequestheader("accept-encoding","gzip, deflate");
  $this->setrequestheader("user-agent","httprequest class 1.0");  //可调用setrequestheader来修改
 }
 
 //连接服务器
 public function open($ip="",$port=-1){
  if(!$this->_geturlinfo()) return false;
  $this->setrequestheader("host",$this->hostname);
  $this->setrequestheader("connection","close");
  $ip = ($ip=="" ? $this->hostname : $ip);
  $port = ($port==-1 ? $this->port : $port);
  if($this->usesocket==1){
   if(!$this->fp=$socket=socket_create(af_inet,sock_stream,0)) {
    $this->excption="can not create socket";return false;
   }else{
    if(!socket_connect($this->fp,$ip, $port) ){
     $this->excption="can not connect to server " . $this->hostname . " on port" . $this->port;return false;
    }
   }
  }else{
   if(!$this->fp=fsockopen($ip, $port,$errno,$errstr,10)) {
    $this->excption="can not connect to server " . $this->hostname . " on port" . $this->port;return false;
   }
  }
  return true;
 }
 
 public function send($data=""){
  if(!$this->fp){$this->excption="is not a resource id";return false;}
  if($this->method=="get" && $data!=""){
   $s_str="?";
   if(strpos($this->uri,"?")>0) $s_str = "&";
   $this->uri.= $s_str . $data;
   $data="";
  }
  $senddata=$this->method . " " . $this->uri . " http/1.1rn";
  if($this->method=="post"){
   $this->setrequestheader("content-length",strlen($data));
   $this->setrequestheader("content-type", "application/x-www-form-urlencoded");
  }
  foreach($this->_headers as $keys => $value){
   $senddata .= "$keys: $valuern";
  }
  $senddata .= "rn";
  if($this->method=="post") $senddata .= $data;
  $this->_senddata = $senddata;
  if($this->usesocket==1){
   socket_write($this->fp,$this->_senddata);
   $buffer="";
   $timestart = time();
   do{
    if($this->timeout>0){
     if(time()-$timestart>$this->timeout){break;}
    }
    $this->_buffer.=$buffer;
    $buffer = socket_read($this->fp,4096);
   }while($buffer!="");
   socket_close($this->fp); 
  }else{
   fputs($this->fp, $senddata);
   $this->_buffer="";
   $timestart = time();
   while(!feof($this->fp))
   {
    if($this->timeout>0){
     if(time()-$timestart>$this->timeout){break;}
    }
    $this->_buffer.=fgets($this->fp,4096);
   }
   fclose($this->fp);   
  }
  $this->_splitcontent();
  $this->_getheaderinfo();
 }
 
 public function getresponsebody(){
  if($this->getresponseheader("content-encoding")=="gzip" && $this->getresponseheader("transfer-encoding")=="chunked"){
   return gzdecode_1(transfer_encoding_chunked_decode($this->responsebody));
  }else if($this->getresponseheader("content-encoding")=="gzip"){
   return gzdecode_1($this->responsebody);
  }else{
   return $this->responsebody;
  }
 }
 
 public function getallresponseheaders(){
  return  $this->responseheader;
 }
 
 public function getresponseheader($key){
  $key = str_replace("-","-",$key);
  $headerstr = $this->responseheader . "rn";
  $count = preg_match_all("/n$key:(.+?)r/is",$headerstr,$result,preg_set_order);
  if($count>0){
   $returnstr="";
   foreach($result as $key1=>$value){
    if(strtoupper($key)=="set-cookie"){
     $value[1] = substr($value[1],0,strpos($value[1],";"));
    }
    $returnstr .= ltrim($value[1]) . "; ";
   }
   $returnstr = substr($returnstr,0,strlen($returnstr)-2);
   return $returnstr;
  }else{return "";}
 }
 
 public function settimeout($timeout=0){
  $this->timeout = $timeout; 
 }
 
 public function setrequestheader($key,$value=""){
  $this->_headers[$key]=$value;
 }
 
 public function removerequestheader($key){
  if(count($this->_headers)==0){return;}
  $_temp=array();
  foreach($this->_headers as $keys => $value){
   if($keys!=$key){
    $_temp[$keys]=$value;
   }
  }
  $this->_headers = $_temp;
 }
 
 //拆分url
 private function _geturlinfo(){
  $url = $this->url;
  $count = preg_match("/^http://([^:/]+?)(:(d+))?/(.+?)$/is",$url,$result);
  if($count>0){
   $this->uri="/" . $result[4];
  }else{
   $count = preg_match("/^http://([^:/]+?)(:(d+))?(/)?$/is",$url,$result);
   if($count>0){
    $this->uri="/";
   }
  }
  if($count>0){
   $this->protocol="http";
   $this->hostname=$result[1];
   if(isset($result[2]) && $result[2]!="") {$this->port=intval($result[3]);}else{$this->port=80;}
   return true;
  }else{$this->excption="url format error";return false;}
 }
 
 private function _splitcontent(){
  $this->responseheader="";
  $this->responsebody="";
  $p1 = strpos($this->_buffer,"rnrn");
  if($p1>0){
   $this->responseheader = substr($this->_buffer,0,$p1);
   if($p1+4<strlen($this->_buffer)){
    $this->responsebody = substr($this->_buffer,$p1+4);
   }
  }
 }
 
 private function _getheaderinfo(){
  $headerstr = $this->responseheader;
  $count = preg_match("/^http/(.+?)s(d+)s(.+?)rn/is",$headerstr,$result);
  if($count>0){
   $this->httpprotocolversion = $result[1];
   $this->status = intval($result[2]);
   $this->statustext = $result[3];
  }
 }
}

//以下两函数参考网络
function gzdecode_1 ($data) {
 $data = ($data);
 if (!function_exists ( 'gzdecode' )) {
  $flags = ord ( substr ( $data, 3, 1 ) );
  $headerlen = 10;
  $extralen = 0;
  $filenamelen = 0;
  if ($flags & 4) {
   $extralen = unpack ( 'v', substr ( $data, 10, 2 ) );
   $extralen = $extralen [1];
   $headerlen += 2 + $extralen;
  }
  if ($flags & 8) // filename
   $headerlen = strpos ( $data, chr ( 0 ), $headerlen ) + 1;
  if ($flags & 16) // comment
   $headerlen = strpos ( $data, chr ( 0 ), $headerlen ) + 1;
  if ($flags & 2) // crc at end of file
   $headerlen += 2;
  $unpacked = @gzinflate ( substr ( $data, $headerlen ) );
  if ($unpacked === false)
   $unpacked = $data;
  return $unpacked;
 }else{
  return gzdecode($data);
 }
}

function transfer_encoding_chunked_decode($in) {
 $out = "";
 while ( $in !="") {
  $lf_pos = strpos ( $in, "12" );
  if ($lf_pos === false) {
   $out .= $in;
   break;
  }
  $chunk_hex = trim ( substr ( $in, 0, $lf_pos ) );
  $sc_pos = strpos ( $chunk_hex, ';' );
  if ($sc_pos !== false)
   $chunk_hex = substr ( $chunk_hex, 0, $sc_pos );
  if ($chunk_hex =="") {
   $out .= substr ( $in, 0, $lf_pos );
   $in = substr ( $in, $lf_pos + 1 );
   continue;
  }
  $chunk_len = hexdec ( $chunk_hex );
  if ($chunk_len) {
   $out .= substr ( $in, $lf_pos + 1, $chunk_len );
   $in = substr ( $in, $lf_pos + 2 + $chunk_len );
  } else {
   $in = "";
  }
 }
 return $out;
}
function utf8togb($str){
 return iconv("utf-8","gbk",$str);
}

function gbtoutf8($str){
 return iconv("gbk","utf-8",$str);
}
?>

response.asp教程文件

<%
response.cookies("a") = "anlige"
response.cookies("a").expires = dateadd("yyyy",1,now())
response.cookies("b")("c") = "wsdasdadsa"
response.cookies("b")("d") = "ddd"
response.cookies("b").expires = dateadd("yyyy",1,now())
response.write "querystring : " & request.querystring & "<br />"
for each v in request.querystring
 response.write v & "=" & request.querystring(v) & "<br />"
next
response.write "<br />form : " &  request.form  & "<br />"
for each v in request.form
 response.write v & "=" & request.form(v) & "<br />"
next
response.write "<br />url : " &  request.servervariables("url")  & "<br />"
response.write "referer : " &  request.servervariables("http_referer")  & "<br />"
response.write "host : " &  request.servervariables("http_host")  & "<br />"
response.write "user-agent : " &  request.servervariables("http_user_agent")  & "<br />"
response.write "cookie" & request.servervariables("http_cookie")
%>

index.php文件

<a href="?action=get">get传数据</a>
<a href="?action=post">post传数据</a>
<a href="?action=header_referer">向服务器发送来路信息</a>
<a href="?action=header_useragent">向服务器发送user-agent</a>
<a href="?action=status">获取服务器返回的状态</a>
<a href="?action=get_headers">获取服务器响应头</a>
<a href="?action=get_image">保存图片</a><br /><br /><br />
<?php
include("inc_http.php");
$responseurl = "http://dev.mo.cn/aiencode/http/response.asp";

$act = isset($_get["action"]) ? $_get["action"] : "";
if($act == "get"){  //get传数据

 $myhttp = new httprequest("$responseurl?a=text");
 $myhttp->open();
 $myhttp->send("name=anlige&city=" . urlencode("杭州"));
 echo($myhttp->getresponsebody()); 
 
}else if($act == "post"){ //post传数据

 $myhttp = new httprequest("$responseurl?a=text","post");
 $myhttp->open();
 $myhttp->send("name=anlige&city=" . urlencode("杭州"));
 echo($myhttp->getresponsebody());
 
}else if($act == "header_referer"){  //向服务器发送来路信息

 $myhttp = new httprequest("$responseurl?a=text","post");
 $myhttp->open();
 $myhttp->setrequestheader("referer","http://www.baidu.com");
 $myhttp->send("name=anlige&city=" . urlencode("杭州"));
 echo($myhttp->getresponsebody()); 
 
}else if($act == "header_useragent"){  //向服务器发送user-agent

 $myhttp = new httprequest("$responseurl?a=text","post");
 $myhttp->open();
 $myhttp->setrequestheader("referer","http://www.baidu.com");
 $myhttp->setrequestheader("user-agent","mozilla/4.0 (compatible; msie 7.0; windows nt 6.0; trident/4.0)");
 $myhttp->send("name=anlige&city=" . urlencode("杭州"));
 echo($myhttp->getresponsebody()); 
 
}else if($act == "status"){   //获取服务器返回的状态

 $myhttp = new httprequest("$responseurl?a=text","post");
 $myhttp->open();
 $myhttp->send("name=anlige&city=" . urlencode("杭州"));
 echo($myhttp->status . " " . $myhttp->statustext ."<br /><br />"); 
 echo($myhttp->getresponsebody());
 
}else if($act == "get_headers"){  //获取服务器响应头

 $myhttp = new httprequest("$responseurl?a=text","get");
 $myhttp->open();
 $myhttp->send("name=anlige&city=" . urlencode("杭州"));
 echo($myhttp->getallresponseheaders()."<br /><br />");  
 echo($myhttp->getresponseheader("server")."<br /><br />"); 
 
}else if($act == "get_image"){
 
 $myhttp = new httprequest("http://www.baidu.com/img/baidu_logo.gif");
 $myhttp->open();
 $myhttp->send(); 
 $fp = @fopen("demo.gif","w");
 fwrite($fp,$myhttp->getresponsebody());
 fclose($fp);
 echo("<img src="demo.gif" />");
}

?>

php教程文件缓存实例代码
缓存在实际使用当中应用很广泛，可以减轻对服务器数据库教程的访问，提高运行速度。目前很多cms内容管理系统中频繁使用缓存机制来提高系统运行的效率
cache.php 代码如下：
php代码
<? 
/*
用户需要事先定义的常量：
_cachepath_        模板缓存路径
_cacheenable_        自动缓存机制是否开启，未定义或为空，表示关闭自动缓存机制
_recachetime_        自动重新缓存间隔时间，单位为秒，未定义或为空，表示关闭自动重新缓存
*/ 
 
class cache { 
 
var $cachefile; 
var $cachefilevar; 
 
function cache() { 
        //生成当前页的cache组文件名 $this->cachefilevar 及文件名 $this->cachefile 
        //动态页的参数不同对应的cache文件也不同，但是每一个动态页的所有cache文件都有相同的文件名，只是扩展名不同 
        $s=array(".","/");$r=array("_",""); 
        $this->cachefilevar=str_replace($s,$r,$_server["script_name"])."_".$_get[_actionvar_]; 
        $this->cachefile=$this->cachefilevar.".".md5($_server["request_uri"]); 
} 
 
//删除当前页/模块的缓存 
function delete() { 
        //删除当前页的缓存 
        $d = dir(_cachepath_); 
        $strlen=strlen($this->cachefilevar); 
        //返回当前页的所有cache文件组 
        while (false !== ($entry = $d->read())) { 
                    if (substr($entry,0,$strlen)==$this->cachefilevar) { 
                            if (!unlink(_cachepath_."/".$entry)) {echo "cache目录无法写入";exit;} 
                    } 
            } 
} 
 
//判断是否已cache过，以及是否需要cache 
function check() { 
        //如果设置了缓存更新间隔时间 _recachetime_ 
        if (_recachetime_+0>0)        { 
                //返回当前页cache的最后更新时间 
                $var=@file(_cachepath_."/".$this->cachefilevar);$var=$var[0]; 
                //如果更新时间超出更新间隔时间则删除cache文件 
                if (time()-$var>_recachetime_) { 
                        $this->delete();$ischage=true; 
                } 
        } 
        //返回当前页的cache 
        $file=_cachepath_."/".$this->cachefile; 
        //判断当前页cache是否存在 且 cache功能是否开启 
        return (file_exists($file) and _cacheenable_ and !$ischange); 
} 
 
//读取cache 
function read() { 
        //返回当前页的cache 
        $file=_cachepath_."/".$this->cachefile; 
        //读取cache文件的内容 
        if (_cacheenable_) return readfile($file); 
        else return false; 
} 
 
//生成cache 
function write($output) { 
        //返回当前页的cache 
        $file=_cachepath_."/".$this->cachefile; 
        //如果cache功能开启 
        if (_cacheenable_) { 
                //把输出的内容写入cache文件 
                fopen($file,'w'">$fp=@fopen($file,'w'); 
                if (!@fputs($fp,$output)) {echo "模板cache写入失败";exit;} 
                @fclose($fp); 
                //如果设置了缓存更新间隔时间 _recachetime_ 
                if (_recachetime_+0>0) { 
                        //更新当前页cache的最后更新时间 
                        $file=_cachepath_."/".$this->cachefilevar; 
                        $fp=@fopen($file,'w'); 
                        if (!@fwrite($fp,time())) {echo "cache目录无法写入";exit;} 
                        @fclose($fp); 
                } 
        } 
} 
 
} 
?> 
使用过程：
php代码
<?php 
        define("_cachepath_","./cache/"); 
        define("_cacheenable_","1"); 
        define("_recachetime_","43200"); 
        include('cache.php'); 
        $cache=new cache(); 
        if ($cache->check()) { 
        $template=$cache->read(); 
                }else { 
                ob_start(); 
                ob_implicit_flush(0); 
        ?> 
                                  页面内容。。。。 
<?php 
        $template = ob_get_contents(); 
        $cache->write($template); 
        } 
        ?>