How can I multiply each item in an array easily with PHP?

Question

I have an array called $times. It is a list of small numbers (15,14,11,9,3,2). These will be user submitted and are supposed to be minutes. As PHP time works on seconds, I would like to multiply each element of my array by 60.

I've been playing around with array_walk and array_map but I can't get those working.

Answer 1

You can use array_map:

array_map() returns an array containing all the elements of arr1 after applying the callback function to each one. The number of parameters that the callback function accepts should match the number of arrays passed to the array_map()

Examples with lambda functions for callbacks:

array_map(function($el) { return $el * 60; }, $input);

Same for PHP < 5.3

array_map(create_function('$el', 'return $el * 60;'), $input);

Or with bcmul for callback

array_map('bcmul', $input, array_fill(0, count($input), 60));

But there is nothing wrong with just using foreach for this as well.