Question

I have an array of values in PHP looking something like this:

$test = array (  
    array( 'val' => 2, 'color' => 'blue' ),  
    array( 'val' => 5, 'color' => 'green' ),  
);

I want to go through all elements of $test and add 1 to all val indices. Now I realize a foreach loop could work, but I am looking for something a little more efficient. The array will potentially have 10’s of thousands of elements and hundreds of sub-elements.

I am wondering if there is some type of way that PHP can go through and modify just that index throughout the entire array, based on the argument that I set.

Answer 1

you can use array_walk and a closure to do it

array_walk($yourArray,function(&$col){$col['val']++});