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php批量上传一[带预览]

代码如下：

<?php
require(inc/conn.php);
?>
<head>
<head>
<meta http-equiv="Content-Type" c />
<title>图片上传实现</title>
<script language="javascript">
function preview(x){
    if(!x || !x.value) return;
    var patn = /.jpg$|.jpeg$|.gif$/i;
    if(patn.test(x.value)){
        if(x.parentNode.nextSibling.firstChild){
            //看看是不是已经添加了图片标签，如果添加了就直接修改图片地址
            x.parentNode.nextSibling.firstChild.setAttribute(src,file://localhost/+x.value);
        }else{
            //没添加就创建个咯，然后加入到当前节点的父节点的下一个节点 -_-
            var img = document.createElement(img);
            img.setAttribute(src,file://localhost/+x.value);
            img.setAttribute(width,120);
            img.setAttribute(height,100);
            x.parentNode.nextSibling.appendChild(img);
            //parentNode  父节点
            //nextSibling 下个节点
            //appendChild 添加个子节点
                        return(x.value);
        }
    }else{
        alert(貌似你选的不是个图片的说！);
        x.value=;                            //本人不懂js，考来的，对不住各位了，也谢谢原作者！
    }
}
</script>
</head>
</head>
<body>

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php压缩技术

GZIP（GNU-ZIP）是一种压缩技术。经过GZIP压缩后页面大小可以变为原来的30%甚至更小。这样用户浏览的时候就会感觉很爽很愉快！
要实现GZIP压缩页面需要浏览器和服务器共同支持，实际上就是服务器压缩，传到浏览器后浏览器解压并解析。浏览器那边不需要我们担心，因为现在绝大多数浏览器都支持解析GZIP过的页面。我们只要把页面在服务器端压缩再输出到浏览器就行了。

有点罗嗦，下面说正事：
正如要制作压缩饼干，先要拿到原料，要压缩一个页面，首先要获得要输出的内容。PHP中的ob_start()（ob => output buffer）函数可以实现这个功能，它可以把程序里准备输出的内容先放到一个叫做“缓冲区”的地方，当然，你可以理解为制作压缩饼干的暂时放原料的工作台。
这个函数一定要在页面输出之前使用，所以一般把它放在代码的最顶端。因为它就像是一个工作台，所以你要在原料到来之前就要准备好它，否则原料来了没地方放，会出问题的。用ob_start()得到要压缩的页面之后，我们就可以制作压缩饼干了，不对，应该是可以压缩页面了！不过好像还缺少一台压缩机，EZ，我们用PHP带的zlib扩展做一台：

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php读取execel内容

<?
define(ABC_CRITICAL,      0);
define(ABC_ERROR,         1);
define(ABC_ALERT,         2);
define(ABC_WARNING,       3);
define(ABC_NOTICE,        4);
define(ABC_INFO,          5);
define(ABC_DEBUG,         6);
define(ABC_TRACE,         7);
define(ABC_VAR_DUMP,      8);
define(ABC_NO_LOG,      -1);
$php_version = split( ".", phpversion() );
if( $php_version[0] == 4 && $php_version[1] <= 1 ) {
    if( !function_exists(var_export) ) {
        function var_export( $exp, $ret ) {
ob_start();
var_dump( $exp );
$result = ob_get_contents();
ob_end_clean();
return $result;
}}}function print_bt()
{
print "<code>n";
$cs = debug_backtrace();
for( $i = 1; $i < count($cs) ; $i++ )
{
$item = $cs[ $i ];
for( $j = 0; $j < count($item[args]); $j++ )
if( is_string($item[args][$j]) )
$item[args][$j] = """ . $item[args][$j] . """;
$args = join(",", $item[args] );
if( isset( $item[class] ) )
$str = sprintf("%s(%d): %s%s%s(%s)",
$item[file],
$item[line],
$item[class],
$item[type],
$item[function],
$args );
else
$str = sprintf("%s(%d): %s(%s)",
$item[file],
$item[line],
$item[function],
$args );
echo $str . "<br>n";
}print "</code>n";
}function _die( $str )
{
print "Script died with reason: $str<br>n";
print_bt();
exit();
}class DebugOut
{
var $priorities = array(ABC_CRITICAL    => critical,
                        ABC_ERROR       => error,
                        ABC_ALERT       => alert,
                        ABC_WARNING     => warning,
                        ABC_NOTICE      => notice,
                        ABC_INFO        => info,
                        ABC_DEBUG       => debug,
                        ABC_TRACE       => trace,
                        ABC_VAR_DUMP        => dump
                        );
var $_ready = false;
var $_currentPriority = ABC_DEBUG;
var $_consumers = array();
var  $_filename;
var  $_fp;
var  $_logger_name;
 function DebugOut($name, $logger_name, $level ){
     $this->_filename = $name;
     $this->_currentPriority = $level;
     $this->_logger_name = $logger_name;
     if ($level > ABC_NO_LOG){
        $this->_openfile();
     }
     register_shutdown_function(array($this,"close"));
 } function log($message, $priority = ABC_INFO) {
        if ($priority > $this->_currentPriority) {
            return false;
        }
        return $this->_writeLine($message, $priority, strftime(%b %d %H:%M:%S));
 } function dump($variable,$name) {
       $priority = ABC_VAR_DUMP;
       if ($priority > $this->_currentPriority ) {
            return false;
       }       $time = strftime(%b %d %H:%M:%S);
       $message = var_export($variable,true);
       return fwrite($this->_fp,
                     sprintf("%s %s [%s] variable %s = %s rn",
                             $time,
                             $this->_logger_name,
                             $this->priorities[$priority],
                             $name,
                             $message)
                             );
 } function info($message) {
        return $this->log($message, ABC_INFO);
 } function debug($message) {
        return $this->log($message, ABC_DEBUG);
 } function notice($message) {
        return $this->log($message, ABC_NOTICE);
 } function warning($message) {
        return $this->log($message, ABC_WARNING);
 } function trace($message) {
        return $this->log($message, ABC_TRACE);
 } function error($message) {
        return $this->log($message, ABC_ERROR);
 }
 function _writeLine($message, $priority, $time) {
    if( fwrite($this->_fp, sprintf("%s %s [%s] %srn", $time, $this->_logger_name, $this->priorities[$priority], $message)) ) {
        return fflush($this->_fp);
    } else {
        return false;
    } } function _openfile() {
    if (($this->_fp = @fopen($this->_filename, a)) == false) {
        return false;
    }        return true;
 } function close(){
    if($this->_currentPriority != ABC_NO_LOG){
        $this->info("Logger stoped");
        return fclose($this->_fp);
    } }
 function Factory($name, $logger_name, $level) {
    $instance = new DebugOut($name, $logger_name, $level);
    return $instance;
 } function &getWriterSingleton($name, $logger_name, $level = ABC_DEBUG){
      static $instances;
      if (!isset($instances)){
        $instances = array();
      }      $signature = serialize(array($name, $level));
      if (!isset($instances[$signature])) {
            $instances[$signature] = DebugOut::Factory($name, $logger_name, $level);
      }     
      return $instances[$signature];
 } function attach(&$logObserver) {
    if (!is_object($logObserver)) {
        return false;
    }    $logObserver->_listenerID = uniqid(rand());
    $this->_listeners[$logObserver->_listenerID] = &$logObserver;
 }}define (ABC_BAD_DATE, -1);
class ExcelDateUtil{
function xls2tstamp($date) {
$date=$date>25568?$date:25569;
   $ofs=(70 * 365 + 17+2) * 86400;
   return ($date * 86400) - $ofs;
}function getDateArray($xls_date){
    $ret = array();
    if ($xls_date == 60) {
        $ret[day]   = 29;
        $ret[month] = 2;
        $ret[year]  = 1900;
        return $ret;
    } else if ($xls_date < 60) {
         $xls_date++;
    }
    $l = $xls_date + 68569 + 2415019;
    $n = (int)(( 4 * $l ) / 146097);
    $l = $l - (int)(( 146097 * $n + 3 ) / 4);
    $i = (int)(( 4000 * ( $l + 1 ) ) / 1461001);
    $l = $l - (int)(( 1461 * $i ) / 4) + 31;
    $j = (int)(( 80 * $l ) / 2447);
    $ret[day] = $l - (int)(( 2447 * $j ) / 80);
    $l = (int)($j / 11);
    $ret[month] = $j + 2 - ( 12 * $l );
    $ret[year] = 100 * ( $n - 49 ) + $i + $l;
    return $ret;
}function isInternalDateFormat($format) {
    $retval =false;
    switch(format) {
        case 0x0e:
        case 0x0f:
        case 0x10:
        case 0x11:
        case 0x12:
        case 0x13:
        case 0x14:
        case 0x15:
        case 0x16:
        case 0x2d:
        case 0x2e:
        case 0x2f:
        case 0xa4:
        case 0xa5:
        case 0xa6:
        case 0xa7:
        case 0xa8:
        case 0xa9:
        case 0xaa:
        case 0xab:
        case 0xac:
        case 0xad:
        $retval = true; break;
        default: $retval = false; break;
    }         return $retval;
}}define(EXCEL_FONT_RID,0x31);
define(XF_SCRIPT_NONE,0);
define(XF_SCRIPT_SUPERSCRIPT,1);
define(XF_SCRIPT_SUBSCRIPT,2);
define(XF_UNDERLINE_NONE,0x0);
define(XF_UNDERLINE_SINGLE,0x1);
define(XF_UNDERLINE_DOUBLE,0x2);
define(XF_UNDERLINE_SINGLE_ACCOUNTING,0x3);
define(XF_UNDERLINE_DOUBLE_ACCOUNTING,0x4);
define(XF_STYLE_ITALIC, 0x2);
define(XF_STYLE_STRIKEOUT, 0x8);
define(XF_BOLDNESS_REGULAR,0x190);
define(XF_BOLDNESS_BOLD,0x2BC);
class ExcelFont {
 function basicFontRecord() {
    return  array(size     => 10,
                    script   => XF_SCRIPT_NONE,
                    undeline => XF_UNDERLINE_NONE,
                    italic   => false,
                    strikeout=> false,
                    bold     => false,
                    boldness => XF_BOLDNESS_REGULAR,
                    palete   => 0,
                    name     => Arial);
 } function getFontRecord(&$wb,$ptr) {
    $retval = array(size     => 0,
                    script   => XF_SCRIPT_NONE,
                    undeline => XF_UNDERLINE_NONE,
                    italic   => false,
                    strikeout=> false,
                    bold     => false,
                    boldness => XF_BOLDNESS_REGULAR,
                    palete   => 0,
                    name     => );
    $retval[size] = (ord($wb[$ptr])+ 256*ord($wb[$ptr+1]))/20;
    $style=ord($wb[$ptr+2]);
    if (($style & XF_STYLE_ITALIC) != 0) {
        $retval[italic] = true;
    }    if (($style & XF_STYLE_STRIKEOUT) != 0) {
        $retval[strikeout] = true;
    }    $retval[palete] = ord($wb[$ptr+4])+256*ord($wb[$ptr+5]);
    $retval[boldness] = ord($wb[$ptr+6])+256*ord($wb[$ptr+7]);
    $retval[bold] = $retval[boldness] == XF_BOLDNESS_REGULAR ? false:true;
    $retval[script] =  ord($wb[$ptr+8])+256*ord($wb[$ptr+9]);
    $retval[underline] = ord($wb[$ptr+10]);
    $length = ord($wb[$ptr+14]);
    if($length >0) {
        if(ord($wb[$ptr+15]) == 0) {
            $retval[name] = substr($wb,$ptr+16,$length);
        } else {
            $retval[name] = ExcelFont::getUnicodeString($wb,$ptr+15,$length);
        }    }    return $retval;
 } function toString(&$record,$index) {
    $retval = sprintf("Font Index = %d nFont Size =%dnItalic = %snStrikeoout=%snPalete=%snBoldness = %s Bold=%sn Script = %dn Underline = %dn FontName=%s<hr>",
                $index,
                $record[size],
                $record[italic]    == true?"true":"false",
                $record[strikeout] == true?"true":"false",
                $record[palete],
                $record[boldness],
                $record[bold] == true?"true":"false",
                $record[script],
                $record[underline],
                $record[name]
                );
    return $retval;
 } function getUnicodeString(&$string,$offset,$length) {
        $bstring = "";
        $index   = $offset + 1;
        for ($k = 0; $k < $length; $k++)
        {
            $bstring = $bstring.$string[$index];
            $index        += 2;
        }        return substr($bstring,0,$length);
 } function ExcelToCSS($rec, $app_font=true, $app_size=true, $app_italic=true, $app_bold=true){
    $ret = "";
    if($app_font==true){
        $ret = $ret."font-family:".$rec[name]."; ";
    }    if($app_size==true){
        $ret = $ret."font-size:".$rec[size]."pt; ";
    }    if($app_bold==true){
        if($rec[bold]==true){
            $ret = $ret."font-weight:bold; ";
        } else {
            $ret = $ret."font-weight:normal; ";
        }    }    if($app_italic==true){
        if($rec[italic]==true){
            $ret = $ret."font-style:italic; ";
        } else {
            $ret = $ret."font-style:normal; ";
        }    }    return $ret;
 }}define ( DP_EMPTY, 0 );
define ( DP_STRING_SOURCE, 1 );
define ( DP_FILE_SOURCE, 2 );
class ExcelParserUtil
{
function str2long($str) {
return ord($str[0]) + 256*(ord($str[1]) +
256*(ord($str[2]) + 256*(ord($str[3])) ));
}}
class DataProvider
{
function DataProvider( $data, $dataType )
{
switch( $dataType )
{
case DP_FILE_SOURCE:
if( !( $this->_data = @fopen( $data, "rb" )) )
return;
$this->_size = @filesize( $data );
if( !$this->_size )
_die("Failed to determine file size.");
break;
case DP_STRING_SOURCE:
$this->_data = $data;
$this->_size = strlen( $data );
break;
default:
_die("Invalid data type provided.");
}$this->_type = $dataType;
register_shutdown_function( array( $this, "close") );
}function get( $offset, $length )
{
if( !$this->isValid() )
_die("Data provider is empty.");
if( $this->_baseOfs + $offset + $length > $this->_size )
_die("Invalid offset/length.");
switch( $this->_type )
{
case DP_FILE_SOURCE:
{
if( @fseek( $this->_data, $this->_baseOfs + $offset, SEEK_SET ) == -1 )
_die("Failed to seek file position specified by offest.");
return @fread( $this->_data, $length );
}case DP_STRING_SOURCE:
{
$rc = substr( $this->_data, $this->_baseOfs + $offset, $length );
return $rc;
}default:
_die("Invalid data type or class was not initialized.");
}}function getByte( $offset )
{
return $this->get( $offset, 1 );
}function getOrd( $offset )
{
return ord( $this->getByte( $offset ) );
}function getLong( $offset )
{
$str = $this->get( $offset, 4 );
return ExcelParserUtil::str2long( $str );
}function getSize()
{
if( !$this->isValid() )
_die("Data provider is empty.");
return $this->_size;
}function getBlocks()
{
if( !$this->isValid() )
_die("Data provider is empty.");
return (int)(($this->_size - 1) / 0x200) - 1;
}function ReadFromFat( $chain, $gran = 0x200 )
{
$rc = ;
for( $i = 0; $i < count($chain); $i++ )
$rc .= $this->get( $chain[$i] * $gran, $gran );
return $rc;
}function close()
{
switch($this->_type )
{
case DP_FILE_SOURCE:
@fclose( $this->_data );
case DP_STRING_SOURCE:
$this->_data = null;
default:
$_type = DP_EMPTY;
break;
}}function isValid()
{
return $this->_type != DP_EMPTY;
}var $_type = DP_EMPTY;
var $_data = null;
var $_size = -1;
var $_baseOfs = 0;
}class ExcelFileParser {
var $dp = null;
var $max_blocks;
var $max_sblocks;
var $fat;
var $sfat;
var $formats;
var $xf;
var $fonts;
    var $dbglog;

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PHP程序员一般都忽略了的几点精华

我发现很多的PHP程序员，尤其是学习还不是很久的，都不知道PHP的精华所在。Perl当年如何在商界出名？其强大的正则表达式。而PHP呢？他是一门从Unix下发展起来的语言，当然也就继续了Perl的很多特点，同时C的优点都有。快速、简洁、明了，尤其是C程序员，PHP是至爱，我就是深爱着“PHP”（都忘了女友了:)）。这里，我想来写一篇PHP的变量、数组应用技巧和PHP的正则表达式、PHP的模板应用，以后有时间再写PHP与COM、PHP与XML的完全结合。

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php实现文件在线压缩功能


<?php

class ZipAllFloder{
    var $cachelist = array();
    var $datasec      = array();  
    var $ctrl_dir     = array();  
    var $eof_ctrl_dir = "x50x4bx05x06x00x00x00x00";  
    var $old_offset   = 0;  
    
    function StartWork($dir){
        $result = $this->GetList($dir);
        $this->ClearCache();
        return $result;
    } 
    function ReadAndExport($filelist,$zipfilename){  
        if (count($filelist)>0){  
            foreach($filelist as $filename){  
                if (is_file($filename)){  
                    $fp = fopen ($filename, "r");  
                    $content = @fread ($fp,filesize($filename));  
                    fclose ($fp);  
                    $filename = basename($filename);  
                    $this -> addFile($content, $filename);  
                }  
            }  
        }else{
            $this -> addFile("This folder have none a single file!","nofile.log");
        }
        $out = $this -> outfile(); 
        $this -> IniVars();
        $fp = fopen($zipfilename,"w");  
        fwrite($fp,$out,strlen($out));  
        fclose($fp);
        $this -> cachelist[] = $zipfilename; 
    }
    function GetList($dir){  
        if (file_exists($dir)){  
            $handle = opendir($dir); 
            while($files = readdir($handle)){  
                if (($files==".")||($files=="..")) continue; 
                if(is_dir($dir."/".$files)){
                    $this -> GetList($dir."/".$files);
                }else{
                    $filelist[] = $dir."/".$files; 
                } 
            }  
            closedir($handle);
            $zipfilename = dirname($dir)."/[FOLDER]".basename($dir).".zip";
            $this -> ReadAndExport($filelist,$zipfilename);
        }  
        return $zipfilename;  
    }  
    function ClearCache(){
        if($num = count($this ->cachelist)){
            for($i=0;$i<$num-1;$i++){
                @unlink($this ->cachelist[$i]);
            }
        }
    }
    function IniVars(){
        $this -> datasec = array();
        $this -> ctrl_dir = array();
        $this -> eof_ctrl_dir = "x50x4bx05x06x00x00x00x00";
        $this -> old_offset   = 0;
    }
    function unix2DosTime($unixtime = 0) {  
        $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);  
        if ($timearray[year] < 1980) {  
            $timearray[year]    = 1980;  
            $timearray[mon]     = 1;  
            $timearray[mday]    = 1;  
            $timearray[hours]   = 0;  
            $timearray[minutes] = 0;  
            $timearray[seconds] = 0;  
        }
        return (($timearray[year]-1980)<<25)|($timearray[mon]<<21)|($timearray[mday]<<16)|($timearray[hours]<<11)|($timearray[minutes]<<5)|($timearray[seconds]>>1);  
    }
    function addFile($data, $name, $time = 0){  
        $name = str_replace(, /, $name);  
        $dtime = dechex($this->unix2DosTime($time));  
        $hexdtime = x . $dtime[6] . $dtime[7]  
                  . x . $dtime[4] . $dtime[5]  
                  . x . $dtime[2] . $dtime[3]  
                  . x . $dtime[0] . $dtime[1];  
        eval($hexdtime = " . $hexdtime . ";);  
        $fr   = "x50x4bx03x04";  
        $fr   .= "x14x00";
        $fr   .= "x00x00";
        $fr   .= "x08x00";
        $fr   .= $hexdtime; 
        $unc_len = strlen($data);  
        $crc     = crc32($data);  
        $zdata   = gzcompress($data);  
        $c_len   = strlen($zdata);  
        $zdata   = substr(substr($zdata, 0, strlen($zdata) - 4), 2);
        $fr      .= pack(V, $crc);
        $fr      .= pack(V, $c_len);
        $fr      .= pack(V, $unc_len);
        $fr      .= pack(v, strlen($name));
        $fr      .= pack(v, 0);
        $fr      .= $name;  
        $fr .= $zdata;  
        $fr .= pack(V, $crc);
        $fr .= pack(V, $c_len);
        $fr .= pack(V, $unc_len);
        $this -> datasec[] = $fr;  
        $new_offset        = strlen(implode(, $this->datasec));  
        $cdrec = "x50x4bx01x02";  
        $cdrec .= "x00x00";
        $cdrec .= "x14x00";
        $cdrec .= "x00x00";
        $cdrec .= "x08x00";
        $cdrec .= $hexdtime;
        $cdrec .= pack(V, $crc);
        $cdrec .= pack(V, $c_len);
        $cdrec .= pack(V, $unc_len);
        $cdrec .= pack(v, strlen($name) );
        $cdrec .= pack(v, 0 );
        $cdrec .= pack(v, 0 );
        $cdrec .= pack(v, 0 );
        $cdrec .= pack(v, 0 );
        $cdrec .= pack(V, 32 );
        $cdrec .= pack(V, $this -> old_offset );
        $this -> old_offset = $new_offset;  
        $cdrec .= $name;  
        $this -> ctrl_dir[] = $cdrec;  
    }
    function outfile(){  
        $data    = implode(, $this -> datasec);  
        $ctrldir = implode(, $this -> ctrl_dir);  
        return  
            $data .  
            $ctrldir .  
            $this -> eof_ctrl_dir .  
            pack(v, sizeof($this -> ctrl_dir)) .
            pack(v, sizeof($this -> ctrl_dir)) .
            pack(V, strlen($ctrldir)) .
            pack(V, strlen($data)) .
            "x00x00";
    }
}

$zip = new ZipAllFloder();
$str = $zip->StartWork("./baby");
echo $str;
?>

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php+ajax剪切图片

<style>
#image{background-image:url(http://pic1.phprm.com/2013/09/05/test1.jpg);width:1000px;height:200px;border:1px solid #000}
/*绝对定位很重要*/
#helper{position:absolute;width:100px;height:100px;border:1px solid #a9b53f;cursor:pointer;display:none;background-color:#999;top:30px;left:30px}
</style>
<script>
//目标源
var target;
//拖拽辅助容器
var helper;
//鼠标默认状态（false=没有按下）
var iMouseDown=false;
//当前的目标源
var ctar;
//鼠标偏移量
var mouseOff;
//ajax相关
var ajax;
//继承number类的NANA0，用途为：如果一个数为100px会返回100。
Number.prototype.NaN0=function(){return isNaN(this)?0:this;}
//初始化AJAX
function createRequest(){
var ajax;
if(window.ActiveXObject){
  try{
   ajax = new ActiveXObject("Microsoft.XMLHTTP");
  }catch(e){
   ajax = false;
  }
}else{
  try{
   ajax = new XMLHttpRequest();
  }catch(e){
   ajax = false;
  }
}
if(!ajax){
  alert("Error creating the XMLHttpRequest object.");
}else{
  return ajax;
}
}
//反送AJAX请求
function cutp(cutC){
ajax=createRequest();
ajax.onreadystatechange = action;
//发送请求的URL
url = "path=./test1.jpg&x="+parseInt(cutC.style.left)+"&y="+parseInt(cutC.style.top)+"&width="+parseInt(cutC.offsetWidth)+"&height="+parseInt
(cutC.offsetHeight);
window.status = url;
ajax.open("GET", "image.php?"+url, true);
ajax.send(null);
}
function action(){
var show = document.getElementById("show");
//如果SHOW这个容器原先有子节点，就清楚子节点
if(show.hasChildNodes()){
  show.removeChild(show.childNodes[0]);
}
//状态为4&200的时候返回信息
if(ajax.readyState==4&&ajax.status==200){
  show.innerHTML = ajax.responseText;
}
}
//创建可拖拽容器
function createContainer(arg){
helper = document.getElementById(helper);
//设置属性
helper.setAttribute("cut",1);
arg.onmouseover = function(){
  helper.style.display="block";
}
arg.onmouseout = function(){
  helper.style.display="none";
}
helper.ondblclick = function(){
  cutp(helper);
}
}
//获取鼠标位置
function mouseCoords(ev){
if(ev.pageX || ev.pageY){
  return {x:ev.pageX, y:ev.pageY};
}
return {
  x:ev.clientX + document.body.scrollLeft - document.body.clientLeft,
  y:ev.clientY + document.body.scrollTop  - document.body.clientTop
};
}

//获取鼠标在当前容器的偏移量
function getMouseOffset(target, ev){
ev = ev || window.event;
var docPos    = getPosition(target);
var mousePos  = mouseCoords(ev);
return {x:mousePos.x - docPos.x, y:mousePos.y - docPos.y};
}
//获取鼠标相对父节点的偏移量
function getPosition(e){
var left = 0;
var top  = 0;
while (e.offsetParent){
  left += e.offsetLeft + (e.currentStyle?(parseInt(e.currentStyle.borderLeftWidth)).NaN0():0);
  top  += e.offsetTop  + (e.currentStyle?(parseInt(e.currentStyle.borderTopWidth)).NaN0():0);
  e     = e.offsetParent;
}
left += e.offsetLeft + (e.currentStyle?(parseInt(e.currentStyle.borderLeftWidth)).NaN0():0);
top  += e.offsetTop  + (e.currentStyle?(parseInt(e.currentStyle.borderTopWidth)).NaN0():0);
return {x:left, y:top};
}
//鼠标移动处罚的函数
function mouseMove(ev){
ev = ev||window.event;
var tar = ev.target||ev.srcElement;
var mousePos = mouseCoords(ev);
var rootar = tar.parentNode;
var mouseOf = getPosition(rootar);
//判断状态
if(iMouseDown&&mouseOff){
  var limLefX=mouseOf.x+rootar.offsetWidth-tar.offsetWidth;
  var limBottomY =mouseOf.y+rootar.offsetHeight-tar.offsetHeight;
  var conLeft = mousePos.x-mouseOff.x;
  var conTop = mousePos.y-mouseOff.y;
  if(conLeft>=mouseOf.x&&conLeft<=limLefX){
   helper.style.left = mousePos.x-mouseOff.x;
  }
  if(conTop>=mouseOf.y&&conTop<=limBottomY){
   helper.style.top = mousePos.y-mouseOff.y;
  }
}
}

//鼠标按键起来的函数
function mouseUp(){
iMouseDown = false;
}

//按下鼠标按键的函数
function mouseDown(ev){
iMouseDown = true;
ev = ev||window.event;
var tar = ev.target||ev.srcElement;
if(tar.getAttribute("cut")){
  var hmouseOff = getPosition(tar);
  helper.style.left = hmouseOff.x;
  helper.style.top = hmouseOff.y;
  mouseOff = getMouseOffset(tar,ev);
}
}
//监听事件
document.onmouseup = mouseUp;
document.onmousemove = mouseMove;
document.onmousedown = mouseDown;
window.onload=function(){
target = document.getElementById("image");
createContainer(target);
}
</script>
<div id="image" class="im"><div id="helper" class="drag">#dragHelper</div></div>
<div id="show"></div>

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用PHP实现小型站点广告管理

图片链接广告大概是最为常用的网络广告模式，但是多条广告的动态随机显示可不是那么简单的事情。PHP的文件上传函数提供了在这块468x60像素的区域（网页广告的标准尺寸）实现能够根据权值大小而随机显示广告的解决方案，从而避免了开发FTP程序或是ASP和Perl CAI中需要外挂扩展才能实现此项功能的弊端。

　　本例在PHP4 MySQL Apache for Win9x/2000下调试通过，共包括两部分：用来增加新广告的程序AddNewAd.php3以及显示广告的程序ShowAd.php3，都存放在服务器PHP文件目录下的“test/guanggao/”目录中。在guanggao目录中建立一个存放广告链接图片的子目录“adbanner/”。下面我们按步骤进行分析。

1.首先，建立MySQL数据库:guanggao

　　在Windows环境下，建立一个MySQL空数据库很简单，因为每个数据库都是存在于mysql/data/目录下的一个子目录，所以只要在该目录下新建子目录guanggao就可以了，这时数据库内还没有任何表和数据。

2.建立新增广告程序：AddNewAd.php3

　　设计思路：其中先用表单得到用户的新广告信息；然后用PHP函数copy()将链接图片（banner）文件上传到服务器adbanner目录下；最后将图片文件名、广告网址、说明、加权信息等写入建立的MySQL数据表ad中。该程序代码如下：

　　# AddNewAd.php3

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