algorithm - php getting sum from foreach loop -

hi how possible sum foreach loop following case:

price = array (     [0] => array         (             [0] => 100             [1] => 200         )      [1] => array         (             [0] => 300             [1] => 400         ) ) 

how can average value sum of each elements? need add

avg1 = price[0][0] + price[1][0] .... + price[n][0] avg2 = price[0][1] + price[1][1] .... + price[n][1] 

then divide num of elements. thanks

try this

<?php    $price = array (     0 => array         (             0 => 100,             1 => 200,         ),      1 => array         (             0 => 300,             1 => 400,         ) ); $a = 0; $b = 0; $i  = 0; foreach($price $p) {     $a += $p[0];     $b += $p[1];     $i++; } echo 'avg of a= '. ($a/$i).php_eol; echo 'avg of b= '. ($b/$i).php_eol; ?> 

it simple clue....you can build in own idea