php在线文件与文件夹压缩实例代码

时间：2015-01-23 来源：西部数据作者：西部数据

注明这款php文件压缩代码他要借助于zip.exe文件,所以我们要把zip.exe压缩文件给拿出来,实例代码如下:

<?php

if ( !IsSet($_GET['dirname']) )

{

show_input_form() ;

}

else

{

// check if empty

if ( emptyempty($_GET['dirname']) )

{

  hg_exit("请输入文件夹名!") ;

}

// check valid dirname

if ( FALSE !== strpos($_GET['dirname'], "/") )

{

  hg_exit(""/" 是非法的文件夹名!") ;

}

if ( FALSE !== strstr($_GET['dirname'], "..") )

{

  hg_exit("".." 是非法的文件夹名!") ;

}

// check valid dir

if ( !is_dir($_GET['dirname']) )

{

  hg_exit(""{$_GET['dirname']}" 不是一个有效的文件夹!") ;

}

$szData = "" ;

$szInfo = "" ;

$file_count = @ZipDir($_GET['dirname'], &$szData, &$szInfo) ;

$info_size_16byte = @sprintf("%016d", @strlen($szInfo)) ;

$szData = @sprintf("%016d",$file_count) . $info_size_16byte . $szInfo . $szData ;

$filename = $_GET['dirname'] . ".dat" ;

if ( function_exists(gzencode) )

{

  $szData = gzencode($szData) ;

  $filename .= ".gz" ;

}

Header("Content-type: application/octet-stream");

Header("Accept-Ranges: bytes");

Header("Accept-Length: " . strlen($szData));

Header("Content-Disposition: attachment; filename=$filename");

echo $szData ;

}

function show_input_form()

{

echo HtmlHead("文件打包") ;

echo "<form name="input">n"

  . "请输入要打包的文件夹,注意,仅当前目录下的文件夹才可以下载!<p>n"

  . "<input name="dirname">n"

  . "<input type="button" value="确定" onClick="show_download_link(dirname.value);">n"

  . "</form>n" ;

echo "<script>n"

  . "input.dirname.focus();n"

  . "function show_download_link(dir)n"

  . "{"

  . "   var top = (screen.height-200)/2 ;n"

  . "   var left = (screen.width-300)/2 ;n"

  . "   newwin=window.open('', '', 'width=300,height=200,top=' + top + ',left=' + left + ', resizable=0,scrollbars=auto');n"

  . "   url = "{$_SERVER['PHP_SELF']}" + "?dirname=" + dir ;n"

  . "   newwin.document.write('<a href=' + url + '>点击此链接下载，<br>或者右键点击此处选择"另存为"</a>');n"

  . "}"

  . "</script>n" ;

echo HtmlFoot() ;

}

function ZipDir($szDirName, &$szData, &$szInfo)

{

// write dir header

$szInfo .= "$szDirName|[dir]n" ;

$file_count = 0 ;

$hDir = OpenDir($szDirName) ;

while ( $file = ReadDir($hDir) )

{

  if ( $file=="." || $file==".." ) continue ;

  $szCurFile = "$szDirName/$file" ;

  if ( Is_Dir($szCurFile) )

  {

   $file_count += ZipDir($szCurFile, &$szData, &$szInfo) ;

  }

  else if ( Is_File($szCurFile) )

  {

   $hCurFile = fopen($szCurFile, "rb") ;

   $size = filesize($szCurFile) ;

   $szStream = fread( $hCurFile, $size ) ;

   fclose($hCurFile) ;

   $file_count++ ;

   // write info

   $szInfo .= "$szCurFile|$sizen" ;

   // write data

   $szData .= $szStream ;

  }

}

// write dir footer

$szInfo .= "$szDirName|[/dir]n" ;

return $file_count ;

}

function hg_exit($str)

{

echo HtmlHead("Error, exit!") ;

echo "<h5>" . $str . "</h5>" ;

echo HtmlFoot() ;

exit ;

}

function HtmlHead($title)

{

return "<html>nn<head>n"

  . "<meta http-equiv="Content-Type" content="text/html; charset=gb2312">n"

  . "<style type="text/css教程">n"

  . "body,input,td{font:12px verdana}n"

  . "</style>n"

  . "</head>nn<body>nn" ;

}

function HtmlFoot()

{

return Copyright() . "n</body>nn</html>" ;

}

function Copyright()

{

return "<center><font size="5" face="楷体_GB2312" color="red">使用完请立即删除本文件，以避免被其它人发现使用!</font></center>n"

  . "<br><hr color="#003388">n"

  . "<center>n"

  . "<p style="font-family:verdana; font-size:12px">Contact us: n"

  . "<a href="http://www.phpfensi.com/" target="_blank">http://www.phpfensi.com/</a></p>n"

  . "</center>n"

  . "</body>n"

  . "n"

  . "</html>" ;

}

?>