Algoritmasına Güvenen İçeri Lütfen

  <?php
function pc_permute($items, $perms = array()) {
    if (empty($items)) {
        echo join(' ', $perms) . "<br />";
    } else {
        for ($i = count($items) - 1; $i >= 0; --$i) {
             $newitems = $items;
             $newperms = $perms;
             list($foo) = array_splice($newitems, $i, 1);
             array_unshift($newperms, $foo);
             pc_permute($newitems, $newperms);
         }
    }
}
  $arr = array('1', '2', '3','4');
  pc_permute($arr);
  ?>

  <?
      $a = array(1,2,3,4);
  $dizi = array();
  for ( $t = 1; $t <=count($a); $t++ )
    {
        $dizi[$t] = kombine ( $a, $t);
    }
  
function kombine ( $a, $t )
    {
        global $dizi;
        if ( $t == 1 ) return $a;
        $temp = array();
        foreach ( $dizi[$t-1] as $k=>$c )
            {
                foreach ( $a as $k1=>$c1 )
                    {
                        if ( strpos ( $c , "," ) !== FALSE )
                                $cx = explode( ",", $c);
                        if ( is_array ( @$cx ) )
                                if ( !in_array($c1, $cx) )
                                {
                                    $temp[] = $c . "," . $c1;
                                    continue;
                                }
                        if ( !is_array ( @$cx ) )
                        if ( $c!=$c1)
                            $temp[] = $c . "," . $c1;
                    }
            }
        return $temp;
    }
    
  print_r ( $dizi );    
  ?>
  C:\php>php h.php
Array
(
    [1] => Array
        (
            [0] => 1
            [1] => 2
            [2] => 3
            [3] => 4
        )
      [2] => Array
        (
            [0] => 1,2
            [1] => 1,3
            [2] => 1,4
            [3] => 2,1
            [4] => 2,3
            [5] => 2,4
            [6] => 3,1
            [7] => 3,2
            [8] => 3,4
            [9] => 4,1
            [10] => 4,2
            [11] => 4,3
        )
      [3] => Array
        (
            [0] => 1,2,3
            [1] => 1,2,4
            [2] => 1,3,2
            [3] => 1,3,4
            [4] => 1,4,2
            [5] => 1,4,3
            [6] => 2,1,3
            [7] => 2,1,4
            [8] => 2,3,1
            [9] => 2,3,4
            [10] => 2,4,1
            [11] => 2,4,3
            [12] => 3,1,2
            [13] => 3,1,4
            [14] => 3,2,1
            [15] => 3,2,4
            [16] => 3,4,1
            [17] => 3,4,2
            [18] => 4,1,2
            [19] => 4,1,3
            [20] => 4,2,1
            [21] => 4,2,3
            [22] => 4,3,1
            [23] => 4,3,2
        )
      [4] => Array
        (
            [0] => 1,2,3,4
            [1] => 1,2,4,3
            [2] => 1,3,2,4
            [3] => 1,3,4,2
            [4] => 1,4,2,3
            [5] => 1,4,3,2
            [6] => 2,1,3,4
            [7] => 2,1,4,3
            [8] => 2,3,1,4
            [9] => 2,3,4,1
            [10] => 2,4,1,3
            [11] => 2,4,3,1
            [12] => 3,1,2,4
            [13] => 3,1,4,2
            [14] => 3,2,1,4
            [15] => 3,2,4,1
            [16] => 3,4,1,2
            [17] => 3,4,2,1
            [18] => 4,1,2,3
            [19] => 4,1,3,2
            [20] => 4,2,1,3
            [21] => 4,2,3,1
            [22] => 4,3,1,2
            [23] => 4,3,2,1
        )
  )
  C:\php>