php - Combining array values in pairs without pairing with previous elements in array -

i'm having trouble combining array values. have tried combine them , make pairs have done want erase pairs not want. please 1 me happen .

// code have is: $inputarray = array('mussafiri', 'fire', 'ubungo', 'mbezi');  $outputarray = array();    $i = 0;     foreach($inputarray $values) {       $j = 0;             foreach($inputarray $values2) {          if($values != $values2){                 $outputarray[] = array($values => $values2);          }                $j++;           }       $i++;  }   print_r($outputarray);   //output  array is:        array (   [0] => array ( [mussafiri] => fire)                   [1] => array ( [mussafiri] => ubungo)                    [2] => array ( [mussafiri] => mbezi)                    [3] => array ( [fire] => mussafiri)                    [4] => array ( [fire] => ubungo)                    [5] => array ( [fire] => mbezi)                    [6] => array ( [ubungo] => mussafiri)                                                      [7] => array ( [ubungo] => fire)                    [8] => array ( [ubungo] => mbezi)                    [9] => array ( [mbezi] => mussafiri )                    [10] => array ( [mbezi] => fire)                    [11] => array ( [mbezi] => ubungo) )  note: not want following pairs appear, want element pair next element , not pair previous element not index 3,6,7,8,9,10 , 11 appear in pair list i.e                     [3] => array ( [fire] => mussafiri)                                       [6] => array ( [ubungo] => mussafiri)                     [7] => array ( [ubungo] => fire)                     [8] => array ( [ubungo] => mbezi)                     [9] => array ( [mbezi] => mussafiri)                     [10] => array ( [mbezi] => fire)                     [11] => array ( [mbezi] => ubungo) 

if understand correctly you're trying create unique pairs array, in case should work:

$pairs = array(); foreach ($inputarray $key => $value) {   ($i = $key + 1; isset($inputarray[$i]); $i++) {     $pairs[] = array($value => $inputarray[$i]);   } } 

the loop sets $i key of current array element + 1, it'll never referencing itself, , never reference previous array members.