php递归遍历之遍历文件夹下的所有文件和子文件

$dirs='e:/pdf'; 

function FileShow($dirs) { 

    $dir=opendir($dirs); 

    while ($f=readdir($dir)) { 

    if($f != '.' && $f != '..'){ 

    $file=$dirs.'/'.$f; 

    if(is_file($file)){ 

        echo 'FileName:'.$file.'<br />'; 

        //echo 'FileName:'.iconv('gb2312','utf-8',$file).'<br />'; 

    }else{ 

        FileShow($file); 

        } 

    } 

    } 

} 

FileShow($dirs);

$random =rand(0,1000);

或者

<?php
 $rand = mt_rand(1, 100);
 
 echo $rand;
?>

srand((double)microtime()*1000000);
$random =rand(0,1000);

/**
*获取一定范围内的多个随机数字
*/
function yang_numberRand($begin = 0, $end = 20, $limit = 5){
    $rand_array = range($begin, $end);
    shuffle($rand_array); //调用现成的数组随机排列函数
    return array_slice($rand_array, 0, $limit); //截取前$limit个
}

if(($HTTP_HOST=="www.111cn.net")or($HTTP_HOST=="111cn.net"))
{
header("HTTP/1.1 301 Moved Permanently");
Header("Location: /index.php");
}
elseif($HTTP_HOST=="www.111cn.net")
{
header("HTTP/1.1 301 Moved Permanently");
Header("Location: http://111cn.net");
}
else
{
Header("Location: /404.htm");
}
?>

//定义编码
header( 'Content-Type:text/html;charset=utf-8 ');

//Atom
header('Content-type: application/atom+xml');

//CSS
header('Content-type: text/css');

//Javascript
header('Content-type: text/javascript');

//JPEG Image
header('Content-type: image/jpeg');

//JSON
header('Content-type: application/json');

//PDF
header('Content-type: application/pdf');

//RSS
header('Content-Type: application/rss+xml; charset=ISO-8859-1');

//Text (Plain)
header('Content-type: text/plain');

//XML
header('Content-type: text/xml');

// ok
header('HTTP/1.1 200 OK');

//设置一个404头:
header('HTTP/1.1 404 Not Found');

//设置地址被永久的重定向
header('HTTP/1.1 301 Moved Permanently');

//转到一个新地址
header('Location: http://www.example.org/');

//文件延迟转向:
header('Refresh: 10; url=http://www.example.org/');
print 'You will be redirected in 10 seconds';

//当然，也可以使用html语法实现
// <meta http-equiv="refresh" content="10;http://www.example.org/ />

// override X-Powered-By: PHP:
header('X-Powered-By: PHP/4.4.0');
header('X-Powered-By: Brain/0.6b');

//文档语言
header('Content-language: en');

//告诉浏览器最后一次修改时间
$time = time() - 60; // or filemtime($fn), etc
header('Last-Modified: '.gmdate('D, d M Y H:i:s', $time).' GMT');

//告诉浏览器文档内容没有发生改变
header('HTTP/1.1 304 Not Modified');

//设置内容长度
header('Content-Length: 1234');

//设置为一个下载类型
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="example.zip"');
header('Content-Transfer-Encoding: binary');
// load the file to send:
readfile('example.zip');

// 对当前文档禁用缓存
header('Cache-Control: no-cache, no-store, max-age=0, must-revalidate');
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); // Date in the past
header('Pragma: no-cache');

//设置内容类型:
header('Content-Type: text/html; charset=iso-8859-1');
header('Content-Type: text/html; charset=utf-8');
header('Content-Type: text/plain'); //纯文本格式
header('Content-Type: image/jpeg'); //JPG***
header('Content-Type: application/zip'); // ZIP文件
header('Content-Type: application/pdf'); // PDF文件
header('Content-Type: audio/mpeg'); // 音频文件
header('Content-Type: application/x-shockw**e-flash'); //Flash动画

//显示登陆对话框
header('HTTP/1.1 401 Unauthorized');
header('WWW-Authenticate: Basic realm="Top Secret"');
print 'Text that will be displayed if the user hits cancel or ';
print 'enters wrong login data';

<?php
$file="./data/file.cache";
 
$array = array("count" => "3000",
 
               "num"  =>"300");
 
//缓存
 
file_put_contents($file,serialize($array));//写入缓存
?>

<?
$file="./data/file.cache";
$handle = fopen($file, "r");
$cacheArray = unserialize(fread($handle, filesize ($file)));
print_r($cacheArray);
?>

<?php //要写入PHP文件的数组

$write_array = array( '1' => 'oneone', '2' => 'two', '3' => 'three', '4' => 'four', '5' => 'five' ); //字符串处理
$string_start = "<?phpn"; $string_process = var_export($write_array, TRUE); $string_end = "n?>"; $string = $string_start.$string_process.$string_end; //开始写入文件
echo file_put_contents('test_array.php', $string);
?>

1，var_export():

<?php
$str="<a href="xxx">超级链接</a>|<a href="xxx">这是个链接</a><br>";
function removelink($str){
$mode=array("#<a href="(.*)">#iUs","#</a>#iUs");
$want=array("","");
$con=preg_replace($mode,$want,$str);
return $con;
}
echo removelink($str);
?>