php zipArchive unzip only certain extensions

Question

I\'m in need of unziping uploaded content. But for security purposes must verify the files are only image files so that somebody can\'t add a php into the zip and then run i

Answer 1

from php.net, handling .txt files

open($filename) === true) {
      echo "Generating TEXT file.";
          for($i = 0; $i < $zip->numFiles; $i++) { 
             $entry = $zip->getNameIndex($i);
               if(preg_match('#\.(txt)$#i', $entry))
                {
                ////This copy function will move the entry to the root of "txt_files" without creating any sub-folders unlike "ZIP->EXTRACTO" function.
                 copy('zip://'.dirname(__FILE__).'/zip_files/'.$value.'#'.$entry, 'txt_files/'.$value.'.txt'); 
                } 
              }  
             $zip->close();
            }
    else{
         echo "ZIP archive failed";
        }
?>