Transform a multidimensional array in php -

this loop

$demo = array(); for($i=0;$i<count($big_array);$i++){     echo 'page['.$i.'][0]: '.$big_array[$i][0].'<br>';     for($j=1;$j<count($big_array[$i]);$j++){          echo 'email['.$i.']['.$j.']: '.$big_array[$i][$j].'<br>';         $demo[$big_array[$i][$j]][] = $big_array[$i][$j-1]; //something not ok     } } 

gives me this:

page[0][0]: http://www.example.com/impressum email[0][1]: sales@example.com email[0][2]: support@example.com page[1][0]: http://www.example.com/termsofuse email[1][1]: support@example.com email[1][2]: terms1@example.com email[1][3]: terms2@example.com email[1][4]: ad2@example.com page[2][0]: http://www.example.com/adpolicy email[2][1]: support@example.com email[2][2]: ad1@example.com email[2][3]: ad2@example.com email[2][4]: ad1@example.com 

how can transform result:

sales@example.com   http://www.example.com/impressum support@example.com   http://www.example.com/impressum   http://www.example.com/termsofuse   http://www.example.com/adpolicy terms1@example.com   http://www.example.com/termsofuse terms2@example.com   http://www.example.com/termsofuse ad2@example.com   http://www.example.com/termsofuse   http://www.example.com/adpolicy ad1@example.com   http://www.example.com/adpolicy 

var_dump($big_array):

array ( 0 => array ( 0 => 'http://www.example.com/impressum', 1 => 'sales@example.com', 2 => 'support@example.com', ), 1 => array ( 0 => 'http://www.example.com/termsofuse', 1 => 'support@example.com', 2 => 'terms1@example.com', 3 => 'terms2@example.com', 4 => 'ad2@example.com', ), 2 => array ( 0 => 'http://www.example.com/adpolicy', 1 => 'support@example.com', 2 => 'ad1@example.com', 3 => 'ad2@example.com', 4 => 'ad1@example.com', ), ) 

$array = array ( 0 => array ( 0 => 'http://www.example.com/impressum', 1 => 'sales@example.com', 2 => 'support@example.com', ), 1 => array ( 0 => 'http://www.example.com/termsofuse', 1 => 'support@example.com', 2 => 'terms1@example.com', 3 => 'terms2@example.com', 4 => 'ad2@example.com', ), 2 => array ( 0 => 'http://www.example.com/adpolicy', 1 => 'support@example.com', 2 => 'ad1@example.com', 3 => 'ad2@example.com', 4 => 'ad1@example.com', ), );  print_r($array);  $final = array(); foreach ( $array $group ) {     ( $i=1; $i<count($group); $i++ )     {         $final[$group[$i]][] = $group[0];     } }  print_r($final); 

here php playground result.

to format example:

foreach ( $final $email => $links ) {     echo $email . "\n";     foreach ( $links $link )     {         echo "  " . $link . "\n";     } }