html - PHP multiply each value in the array by an additional argument -

i trying create php function multiplies values/content of array given argument.

modify function can pass additional argument function. function should multiply each value in array additional argument (call additional argument 'factor' inside function). example $a = array(2,4,10,16). when say

$b = multiply($a, 5);   var_dump($b); should dump b contains [10, 20, 50, 80 ] 

here's code far:

$a = array(2, 4, 10, 16);          function multiply($array, $factor){             foreach ($array $key => $value) {                    echo $value = $value * $factor;             }          }          $b = multiply($a, 6);         var_dump($b); 

any idea? thanks!

your function not right, has return array , not echo values.

    function multiply($array, $factor)     {         foreach ($array $key => $value)         {                   $array[$key]=$value*$factor;         }         return $array;     } 

rest fine.

fiddle

you can array_map

$a = array(2, 4, 10, 16); print_r(array_map(function($number){return $number * 6;}, $a)); 

fiddle