php在线解压ZIP文件的方法

<table border="0" > 
<form ENCTYPE="multipart/form-data" action="upsave.php" method="post">
 
<tr> 
<td>如果是.ZIP的文件会被自动解压缩
<INPUT NAME="MyFile" TYPE="File" size="50"> 
</td> 
</tr> 
<tr> 
<td colspan="2" align="center"> 
<input type="Submit" value=" 上传 " class=iwhite> 
<input type="reset" value=" 重填 " class=iwhite> 
</td> 
</tr> 
</table>
</body> 
</html>

<?php
//保存上传的文件 
$filename="$MyFile_name"; 
copy($MyFile,"$filename"); 
unlink($MyFile); 
 
//判断是否是ZIP文件 
$expand_name=explode(".",$filename); 
if($expand_name[1] == "zip" or $expand_name[1] == "ZIP") 
{ 
$str="pkunzip.exe -e $filename "; 
exec($str); 
unlink($filename); 
} 
?>