copy data from one file to another file

[ravi_aptech]

dear friends,

there is a one problem which i faced here.

i want copy one file from another then update copied file and finally changed file is overwrite on the original file.

but when i want to open copied file original file is opened .

what can i do?

code is as follows

if(!empty($files))
{
if(!is_dir("temp"))
{
mkdir("temp",0777);
}
if (!copy($files, 'temp/'.$files)) {
print ("failed to copy $file...<br>\n");
}

$tempdir = openDir( "temp" );

  while( $tempfile = readDir( $tempdir ) ) 
  {
   print realpath($tempfile);
            print"<br>";
           print realpath($files);
           print "<br>";
           if ($tempfile==$files)
           {
                 break;
            }

  }

 //unlink($files);
//chmod($files,0777) or die("access denied");
$fp = fopen ($tempfile, "r") or die("file is not open ");
$len= filesize($tempfile);
$op=fread($fp,filesize($tempfile)) ;
if (eregi ("<title>(.*)</title>", $op, $out) ) 
      {
      $title = $out[1];        
      }
$op=eregi_replace($title,"ravindra ghetia",$op);
fputs($fp,$op);
:mad: