How to find number of inbound links in php if i have array of linking between pages? -

i have 2d array represent outgoing links of each page returned search engine, have find number of inbound links of each page.

eg 1 present in sub array in key2,3,4,5,6 number of inbound 5.

i need in php.

$links = array(          1 => array(2,3,4,5,6),         2 => array(1,3,4,5,6),         3 => array(1,2,4,5,6),         4 => array(1,2,3,5,6),         5 => array(1,2,3,4,6),         6 => array(1,2,3,4,5),         7=> array (11),         8=>array(7,9),         9=> array(7),         10=> array(8),         11=> array(8,10),  ); 

probably cleaner way, 1 way create new array, loop on existing array, , add new array using value key.

$results=array(); foreach($links $link){     foreach($link $value){         $results[$value] = isset($results[$value]) ? $results[$value]+1 : 1;     } } 

with example data, results -

array (      [1] => 5      [2] => 5      [3] => 5      [4] => 5      [5] => 5      [6] => 5      [7] => 2      [8] => 2      [9] => 1      [10] => 1      [11] => 1 )