php读取zip文件的详细信息的代码

<?php
$zip = zip_open("20101105.zip");
if ($zip) {
  while ($zip_entry = zip_read($zip)) {
     echo "Name: " . zip_entry_name($zip_entry) . "<br/>";
     echo "Actual Filesize: " . zip_entry_filesize($zip_entry) . "<br/>";
     echo "Compressed Size: " . zip_entry_compressedsize($zip_entry) . "<br/>";
     echo "Compression Method: " . zip_entry_compressionmethod($zip_entry) . "<br/>";
       if (zip_entry_open($zip, $zip_entry, "r")) {
           echo "File Contents:" . "<br/>";
           $buf = zip_entry_read($zip_entry, zip_entry_filesize($zip_entry));
           echo "$buf";
           zip_entry_close($zip_entry);
         }
           echo "<br/>";
     }
     zip_close($zip);
}
?>