Program to save number list in txt file ( 000000 to 606060 )

 
class combo_lock{
 
   var $max_number;  // numbers available on the combination
 
   var $number_sets; // number of sets containing the max_numbers
 
   var $filename;    // filename to output to
 
   
 
   function combo_lock(){
 
      $this->max_number = 0; // defualt assignments
 
      $this->number_sets   = 0;
 
      $this->filename      = "";
 
   }
 
   
 
   function start_unlock($echo){
 
      if (($this->max_number != 0) && ($this->number_sets != 0) && ($this->filename != "")) {
 
         $power_of   = pow($this->max_number,$this->number_sets); // get possible number of combinations
 
         $fh         = fopen($this->filename,"w");           // open file for writting
 
         $line_num   = 0;
 
         for ($i = 0; $i < $power_of; $i++){
 
            $v1   = $i % $this->max_number;
 
            for ($j = 1; $j <= $this->number_sets; $j++){
 
               $output[$j] = ($i / (pow($this->max_number,$j))) % $this->max_number;
 
            } // get combinations available at point i
 
            $output_str = $v1;
 
            for ($j = 1; $j < count($output);$j++){
 
               $output_str .= "-" . $output[$j];
 
            } // build output string
 
            $output_str .= "\n";
 
            $line_num++;
 
            if ($echo == 1) {
 
               echo "<b>" . $line_num . "</b>:" . $output_str . "<br />";  
 
            }
 
            fwrite($fh,$output_str);
 
         } // for loop though number of combinations
 
         fclose($fh);
 
         echo "Completed!" ;
 
      }else{
 
         die ("Please set the properties for the class");
 
      }
 
   }
 
   
 
}
 
 
 
 
 
// usage-----------------------------------------------------------------
 
$oLock   = new combo_lock();
 
$oLock->max_number   = 10;
 
$oLock->number_sets = 5;
 
$oLock->filename  = "combo_lock.txt";
 
$oLock->start_unlock(1); // 1 to echo the values (true)