php 文件目录操作函数

<?php
$filename = '/path/to/foo.txt';

if (file_exists($filename)) {
    print "The file $filename exists";
} else {
    print "The file $filename does not exist";
}
?>

$fp=fopen('aa.txt',   'w+');   //建立一新文件  
chmod('aa.txt',   0777);   //设定权限,不然的话建立后无法修改,删除   //好象这行不用也可以
fwrite($fp,   '要写入的内容');   //写内容  
fclose($fp);   //关闭文件

function dir_clear($dir) {
    $directory = dir($dir);                //创建一个dir类(Php手册上这么说的)，用来读取目录中的每一个文

件
    while($entry = $directory->read()) {   //循环每一个文件,并取得文件名$entry
        $filename = $dir.'/'.$entry;       //取得完整的文件名，带路径的
        if(is_file($filename)) {           //如果是文件，则执行删除操作
            @unlink($filename);
        }
    }
    $directory->close();                   //关闭读取目录文件的类
    result();
}

<?php
/*
 * PHP 读取目录下及其子目下的文件函数
 * */
$files=getFile("images");//调用函数
foreach ($files as $name){
 echo "$name"."<br>";
}
 
function getFile($dir){
 $files=array();
 if (is_file($dir)){//如果指定路径为文件直接返回
  return $dir;
 }
 
 $hande=opendir($dir);
 
 if ($hande){
  while (false!==($ufile=readdir($hande))){//如果读取目录成功
   if ($ufile!="." && $ufile!=".."){
    $filename=$dir."/".$ufile;
    if (is_file($filename)){
     $files[]=$filename;
    }else{
     $files=array_merge($files,getFile($filename));
    }
   }
  }//end While
  closedir($hande);
 }//end if
 
 return $files;
}
?>

<?php
class BaseClass {
   public function test() {
       echo "BaseClass::test() called＼n";
   }
  
   final public function moreTesting() {
       echo "BaseClass::moreTesting() called＼n";
   }
}

class ChildClass extends BaseClass {
   public function moreTesting() {
       echo "ChildClass::moreTesting() called＼n";
   }
}
// 产生 Fatal error: Cannot override final method BaseClass::moreTesting()
?>
Example #2 Final 类示例

<?php
final class BaseClass {
   public function test() {
       echo "BaseClass::test() called＼n";
   }
  
   // 这里无论你是否将方法声明为final，都没有关系
   final public function moreTesting() {
       echo "BaseClass::moreTesting() called＼n";
   }
}

class ChildClass extends BaseClass {
}
// 产生 Fatal error: Class ChildClass may not inherit from final class (BaseClass)
?>

<?php
function test()
{
    static $var1=1;
    $var1+=2;
    echo $var1.' ';
}

test();
test();
test();
?>

<?php
Class Person{
    // 定义静态成员属性
    public static $country = "中国";
    // 定义静态成员方法
    public static function myCountry() {
        // 内部访问静态成员属性
        echo "我是".self::$country."人<br />";
    }
}
class Student extends Person {
    function study() {
        echo "我是". parent::$country."人<br />";
    }
}
// 输出成员属性值
echo Person::$country."<br />";  // 输出：中国
$p1 = new Person();
//echo $p1->country;   // 错误写法
// 访问静态成员方法
Person::myCountry();   // 输出：我是中国人
// 静态方法也可通过对象访问：
$p1->myCountry();

// 子类中输出成员属性值
echo Student::$country."<br />"; // 输出：中国
$t1 = new Student();
$t1->study();    // 输出：我是中国人
?>

<?php
Class Person{
    // 定义常量
    const country = "中国";

    public function myCountry() {
        //内部访问常量
        echo "我是".self::country."人<br />";
    }
}

// 输出常量
echo Person::country."<br />";

// 访问方法
$p1 = new Person();
$p1 -> myCountry();
?>

<?php
// Declare a simple class
class TestClass
{
    public $foo;

    public function __construct($foo)
    {
        $this->foo = $foo;
    }

    public function __toString() {
        return $this->foo;
    }
}

$class = new TestClass('Hello');
echo $class;
?>

<?php
class SubObject
{
    static $instances = 0;
    public $instance;

    public function __construct() {
        $this->instance = ++self::$instances;
    }

    public function __clone() {
        $this->instance = ++self::$instances;
    }
}

class MyCloneable
{
    public $object1;
    public $object2;

    function __clone()
    {
     
        // 强制复制一份this->object， 否则仍然指向同一个对象
        $this->object1 = clone $this->object1;
    }
}

$obj = new MyCloneable();

$obj->object1 = new SubObject();
$obj->object2 = new SubObject();

$obj2 = clone $obj;

print("Original Object:＼n");
print_r($obj);

print("Cloned Object:＼n");
print_r($obj2);

?>

<?php
session_start();
require_once 'MyClass.php';
$obj = new MyClass;
$_SESSION['obj'] = $obj;
?>

<?php
session_start();
require_once 'MyClass.php';
$_SESSION['obj']->callSomeMethod();
?>

<?php
require_once 'MyClass.php';
session_start();
$_SESSION['obj']->callSomeMethod();
?>

<?php

$discuz_url = ‘http://localhost/klive/root/Discuz_X2.5_SC_GBK/’;//论坛地址
$login_url = $discuz_url .’member.php?mod=logging&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'] = ‘admin’;
$post_fields['password'] = ‘admin’;
//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.”forum.php?mod=post&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);

?>

/* 添加赠品到购物车 */
foreach ($favourable['gift'] as $gift)
{
    if (in_array($gift['id'], $_POST['gift']))
    {
        add_gift_to_cart($act_id, $gift['id'], $gift['price']);
    }
}

function add_gift_to_cart($act_id, $id, $price)
{
    $sql = "INSERT INTO " . $GLOBALS['ecs']->table('cart') . " (" .
                "user_id, session_id, goods_id, goods_sn, goods_name, market_price, goods_price, ".
                "goods_number, is_real, extension_code, parent_id, is_gift, rec_type, is_shipping ) ".
            "SELECT '$_SESSION[user_id]', '" . SESS_ID . "', goods_id, goods_sn, goods_name,

market_price, ".
                "'$price', 1, is_real, extension_code, 0, '$act_id', '" . CART_GENERAL_GOODS . "' ,

is_shipping " .
            "FROM " . $GLOBALS['ecs']->table('goods') .
            " WHERE goods_id = '$id'";
    $GLOBALS['db']->query($sql);
}