Problems related to phpFOR loop optimization

The problem of loop optimization in phpFOR was not followed by a post last time. it may be that the problem is not specific, or the php basic programming staff is few or too busy ............. I want to select 6 non-repeated numbers from 1-33, and then write the numbers into the database. Currently, PHP is very slow to process and there are still errors. who is interested in helping me optimize the following code: PHPcode & lt ;? Php FOR loop optimization
No one followed the Last Post. it may be because the problem is not specific or the php programming is very small or busy .............

I want to select 6 distinct numbers from 1-33 and write them to the database.
Currently, PHP is still handling very slowly errors during the code selection process. who is interested in helping me optimize the following code:

PHP code

  
  "; // Display effect. I want to write a TXT file to the file, for example, database. }}}}?>

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PHP code

$ A = range (1, 33); $ ar = combination ($ a, 6); // Evaluate the efficient 10-moving function combination ($ numArr, $ combineLen) {$ numCt = count ($ numArr); if ($ combineLen> $ numCt) return; $ bin = str_pad ('', $ combineLen, '1 '); $ bin = str_pad ($ bin, $ numCt, '0', STR_PAD_RIGHT); $ find = $ bin; $ rs [] = implode ('', array_slice ($ numArr, 0, $ combineLen); $ j = 1; while (strrev ($ find )! = $ Bin) {$ k = explode ('10', $ find, 2); $ find = $ find {0 }== '0 '? Strrev ($ k [0]). '01 '. $ k [1]: $ k [0]. '01 '. $ k [1]; for ($ I = 0; $ I <$ numCt; $ I ++) $ rs [$ j]. = $ find [$ I]? $ NumArr [$ I]. "": ''; $ j ++;} return $ rs ;}
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PHP code
   
   
[User:root Time:21:21:46 Path:/home/liangdong/php]$ php permutation.php Total time used : 9738642ms[User:root Time:21:21:56 Path:/home/liangdong/php]$ cat permutation.php 
    = $total; ++ $ndx) {                $temp[$num] = $table[$ndx];                _get_permutations($ndx + 1, $num + 1);        }}function get_permutations($n = 6) {        global $total;        global $perms;        global $fp;        if ($n <= 0 && $n > 33) {                return false;        }        $total = $n;        $fp = fopen("data.txt", "w");        _get_permutations(0, 0);        fclose($fp);        return true;}get_permutations();$end_time = microtime(true);$end_time *= 1000 * 1000;echo "Total time used : " . ($end_time - $beg_time) . "ms" . PHP_EOL;?>