How can I apply a function to every 'foreach' result?

Question

I'm trying to create a very simple database-driven block builder, for some fun Christmas coding. At the moment I get all the blocks in the correct order from the database and then run a foreach to loop through them:

function get_blocks() {
    global $db;
    $GLOBALS['current_page_id'] = get_page_id();
    $stm = $db->prepare("SELECT * FROM page_blocks WHERE page_id = :id ORDER BY `block_order` ASC");
    $stm->execute(array(':id' => 1));
    $res = $stm->fetchAll();
    return $res;
}

$blocks = get_blocks();

foreach($blocks as $block) {
    if($block['block_name'] == 'block-type-1') {
        //code to execute
    }
}

It works, but I need to be able to apply a function to each block similar to (and yes, I know this won't work):

foreach($blocks as have_block($block))

Is there a way to loop through the blocks from the database in order and then apply a function to the result?

Answer 1

I think that array_walk is what you need: http://php.net/manual/en/function.array-walk.php

array_walk($blocks, 'some_function');