PHP simply removes large text duplication_PHP tutorial

error_reporting(0);
@ini_set('memory_limit','-1');
set_time_limit(0);
echo" Text duplication removal tool"."rnrn";
echo"n"."Enter the files to be sorted:"."n";
$dic=trim(fgets(STDIN));
/*while (!feof($dic)){
          $file[]=stream_get_line($fp,65535,"rn");
}
*/

$file=file($dic);
$array=preg_replace('/($s*$)|(^s*^)/m','',$file); //Eliminate blank lines
$new_array=array_values(array_unique($array));//Eliminate duplicate rows
$new_filename="new_".basename($dic);

if(file_put_contents("$new_filename",join("rn",$new_array))){

          $num=count($file);
         $new_num=count($new_array);
         $counts=$num-$new_num;
          $files=dirname(__FILE__).DIRECTORY_SEPARATOR.$new_filename;

echo<< +------------------------------------------------+
| [+] Duplicate removal completed! www.2cto.com |
| [+] The sorted files are: $files |
| [+] Number of original dictionaries: $num rows |
| [+] After sorting: $new_num rows |
| [+] $counts rows replaced in total |
+------------------------------------------------+
INFO;

}

else{
echo"------------------------------------------------"."rn";
echo "[*] Error!"."rnrn";
             echo "[*] File not found! Please check if the input path exists!"."rn";
echo"------------------------------------------------"."rn";
exit();
}


?>