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<?
/* 发送一个头部，以便让浏览器知道该文件所包含的内容类型*/
header("Content-type: image/jpg");
/* 建立保存新图像高度和宽度的变量*/
$newWidth = 35;
$newHeight = 35;
/* 建立给定高度和宽度的新的空白图像*/
$newImg = ImageCreate($newWidth,$newHeight);
/* 从原来较大的图像中得到数据*/
$origImg = ImageCreateFromJPEG("test.jpg");
/*拷贝调整大小后的图像，使用ImageSX()、ImageSY()得到原来的图像在X、Y方面上的大小 */
ImageCopyResized($newImg,$origImg,0,0,0,0,$newWidth,$newHeight,ImageSX($origImg),ImageSY($origImg));
/*创建希望得到的图像，释放内存 */
$red=ImageColorAllocate($im,255,0,0);
ImageString($newImg,5,10,10," HI ！HELLO！",$red);
ImageJPEG($newImg);
ImageDestroy($newImg);
?＞


error_reporting(E_ERROR | E_WARNING | E_PARSE);
header("Content-Language: charset=zh-cn");
header("Content-type: text/html; charset=GB2312");

//+-----------------------------------------------------------------------------
//定义常量
define( "SITE_NAME", "NetX商务在线5.0---PHP5开发测试版!");
define( "CLASS_PATH" , "classes/");
define( "SESSION_PATH" , "session/");

//+------------------------------------------------------------------------------
//打开缓冲区
ob_start();

//+------------------------------------------------------------------------------
//设置session保存目录
session_save_path(SESSION_PATH);
if(function_exists(session_cache_limiter)) {
session_cache_limiter("nocache");
}
session_start();

//+-----------------------------------------------------------------------------
//定义自动加载类

function __autoload($className){
require_once(CLASS_PATH.$className.".php");
}


//+-----------------------------------------------------------------------------
//定义一个接口
interface index {

public function application();
public function module_var();
public function parse_incoming();
public function safeChars($safestr);

}


//定义一个类
class MainClass implements index{
//+----------------------------------------------------------------------------------
//属性
public $site_name;
public $netx;
public $temp;
public $mod = "";
public $module_class;
public $subtemplate;
public $NetXHeader;
public $module;
public $NetXFooter;
public $input;

//+---------------------------------------------------------------------------------------
//以下是定义类中的方法
//+---------------------------------------------------------------------------------------

//+----------------------------------------------------------------------------
//构造函数
function __construct(){

//+----------------------------------------------------------------------------
//加载MYSQL驱动!
$this->netx = new db_driver;

//+----------------------------------------------------------------------------
//加载模板驱动!
$this->temp = new Template("header");
$this->NetXHeader = new getHeader($this->temp,$this->netx);

$this->temp = new Template("footer");
$this->NetXFooter = new getFooter($this->temp);

//+-------------------------------------------------------------------------------
//解析输入
$this->input = $this->parse_incoming();

//+-------------------------------------------------------------------------------
//模块调用,自动加载$module_var类!
$module_var = $this->module_var();
$this->module = new $module_var($this->netx,$this->input,$module_var);
}
//End Function

//+----------------------------------------------------------------------------
//析构函数
function __destruct(){
$this->netx->db_close();
}
//End Function

function __call($function_name, $args){
$this->halt("使用".get_class()."类未定义的".$function_name."()方法!");
exit;
}

function __set($property_name, $value){
$this->halt("使用".get_class()."类未定义的属性".$property_name);
exit;
}
//+---------------------------------------------------------------------------
//入口函数
public function application(){

$this->NetXHeader->application();
$this->module->application();
$this->NetXFooter ->application();
}
//End Function

//+---------------------------------------------------------------------------
//设置模板变量!
public function module_var(){

@$this->mod = isset($_GET["mod"]) ? $_GET["mod"] : $_POST["mod"];
if(isset($this->mod)){
if (!file_exists(CLASS_PATH.$this->mod.".php")){
$this->mod = "main";
}
return $this->mod;
}else{
$this->mod = "main";
return $this->mod;
}
}
//End Function

//+--------------------------------------------------------------------------------------
//输入解析函数
public function parse_incoming(){
//+--------------------------------------------------------------------------------
//接收GET变量!
$return = array();
if(is_array($_GET)){
foreach($_GET as $k=>$v){
if(is_array( $_GET[$k])){
foreach($_GET[$k] as $k2=>$v2){
$return[$k][$k2] = $this->safeChars($v2);
}
}else{
$return[$k] = $this->safeChars($v);
}
}
}

//+-----------------------------------------------------------------------------
//用POST变量覆写GET变量
if(is_array($_POST)){
foreach($_POST as $k=>$v){
if(is_array($_POST[$k])){
foreach($_POST[$k] as $k2 => $v2){
$return[$k][$k2] = $this->safeChars($v2);
}
}else{
$return[$k] = $this->safeChars($v);
}
}
}
return $return;
}

//+------------------------------------------------------------------------------------
//数据安全性检查
public function safeChars($safestr){

$safestr = trim($safestr);
$safestr = str_replace("*", "*", $safestr);
$safestr = str_replace("|", "|", $safestr);
$safestr = str_replace("&", "&", $safestr); // 正常显示符号 &
$safestr = str_replace(">", ">", $safestr);
$safestr = str_replace("<", "<", $safestr);
$safestr = str_replace(""", """, $safestr);
$safestr = str_replace(""", """, $safestr);
$safestr = str_replace(" ", "<br />", $safestr); // 兼容 XHTML，改用 <br />
$safestr = str_replace(" ", "",$safestr); // 建议保留
$safestr = str_replace(" ","",$safestr);

return $safestr;
}
//End Function

//+------------------------------------------------------------------------------------
//发送警告信息
function halt($msg){
echo "<script language="javascript">";
echo "alert("$msg");";
echo "window.close();";
echo "</script>";
}
//End Function
}
//End Class

//+-----------------------------------------------------------------------------
//创建一个对象,并执行该对象的动作
$app = new MainClass;
$app->application(); //NetX商务在线程序入口
//+----------------------------------------------------------------------------

//+--------------------------------------------------------------------------------
?>


计算两个日期相差几天
<?php
$date1 = "2004-7-1";
$date2 = "2005-8-9";
$d = (maketime($date2) - maketime($date1)) / (3600*24);
echo "相差 $d 天";

function maketime($date)
{
list($year,$month,$day) = explode("-",$date);
return mktime(0,0,0,$month,$day,$year);
}
?>

搂住，对于我们这些新人，你不说清楚它的功能，怎么知道它的是否经典呢？