Php multi-array combination arrangement algorithm

Evaluate the php multi-array combination arrangement algorithm to simulate four arrays:
$ List ['A'] = array (1, 2, 3 );
$ List ['B'] = array (4, 5, 6 );
$ List ['c'] = array (7, 8, 9 );

Combination of requirements:, 68, 69

Algorithm

Reply to discussion (solution)

A piece of code is displayed on the Internet:

 getsulie($list,$v,1);            }                     }        function getsulie($list,$content,$deep){            $i=0;            if($deep>count($list)){                return;            }            foreach($list as $k=>$v){                if($i==$deep){                    foreach($list[$k] as $vv){                        $vv = $content.$vv;                        if($deep==count($list)-1){                            echo $vv."
";                        }else {                            $this->getsulie($list,$vv,$deep+1);                        }                    }                    break;                }                $i++;            }            return;        }    }    $s = new sufa();    $s->main();     ?>

But this is not the same.

Recursion is not easy to use. please kindly advise

$list['a'] = array (1,2,3);$list['b'] = array (4,5,6);$list['c'] = array (7,8,9);foreach($list as $key=>$row) {  unset($list[$key]);  foreach($row as $col) {    foreach($list as $r)      foreach($r as $v) $res[] = $col . $v;  }}echo join(',', $res);

, 69

$list['a'] = array (1,2,3);$list['b'] = array (4,5,6);$list['c'] = array (7,8,9);foreach($list as $key=>$row) {  unset($list[$key]);  foreach($row as $col) {    foreach($list as $r)      foreach($r as $v) $res[] = $col . $v;  }}echo join(',', $res);

, 69

A positive solution, how can we implement a combination of three numbers, such

$list['a'] = array (1,2,3);$list['b'] = array (4,5,6);$list['c'] = array (7,8,9);$list['d'] = array (10,11,12);

Finally, you need to get:
147,148,149,157,158,159,167,168,169,247,248,249,257,258,259,267,268,269,347,348,349,357,358,359,367,368,369

$list['a'] = array (1,2,3);$list['b'] = array (4,5,6);$list['c'] = array (7,8,9);foreach($list as $key=>$row) {  unset($list[$key]);  foreach($row as $col) {    foreach($list as $r)      foreach($r as $v) $res[] = $col . $v;  }}echo join(',', $res);

, 69

I wrote an error and wrote an array,

$list['a'] = array (1,2,3);$list['b'] = array (4,5,6);$list['c'] = array (7,8,9);

Finally, you need to get:
147,148,149,157,158,159,167,168,169,247,248,249,257,258,259,267,268,269,347,348,349,357,358,359,367,368,369

I thought you were in urgent need of solving problems at work. I didn't think you were studying algorithms.
From an algorithm perspective, your two questions should be: perform Cartesian product operations on the result of the combination of the original data (C (m, n ).
The code will not be pasted. you can find multiple versions in the essence area.

I thought you were in urgent need of solving problems at work. I didn't think you were studying algorithms.
From an algorithm perspective, your two questions should be: perform Cartesian product operations on the result of the combination of the original data (C (m, n ).
The code will not be pasted. you can find multiple versions in the essence area.

Thank you.