php在线文件与文件夹压缩实例代码-php教程

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" 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 >Contact us: n"
. "<a href="http://www.phpfensi.com/" target="_blank">http://www.phpfensi.com/</a></p>n"
. "</center>n"
. "</body>n"
. "n"
. "</html>" ;
}
?>

php在线文件与文件夹压缩实例代码

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