better-or-worse.php

<?php

array_walk($attributes, function($definition, $attribute) use ($defaults, $catalog) {
    $definition = array_merge($defaults, $definition);
    $catalog->addAttribute('catalog_product', $attribute, $definition);
});

foreach($attributes as $definition => $attribute) {
    $definition = array_merge($defaults, $definition);
    $catalog->addAttribute('catalog_product', $attribute, $definition);
}

Which one of these is "better"?

"Refactoring to Collections" would suggest that it's array_walk. Perhaps because array_walk specifically defines what it uses, it's better? $defaults and $catalog could, if so desired, be refactored out into a third parameter of array_walk and the closure that would be an object type that would specifically define what those are.

Where as foreach does not have that option.

But is that really better?

And does it matter that this is an Install Script?