Question

Do I really have to do this to reset an array?

foreach ($array as $i => $value) {
    unset($array[$i]);
}

EDIT:

This one makes more sense, as the previous one is equivalent to $array=array();

foreach ($array as $i => $value) {
    $array[$i]=NULL;
}

Answer 1

Define this function and call it whenever you need it:

function erase_val(&$myarr) {
    $myarr = array_map(create_function('$n', 'return null;'), $myarr);
}

// It's call by reference so you don't need to assign your array to a variable.
// Just call the function upon it
erase_val($array);

That’s all!