delete all values from an array while keeping keys intact

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

$keys = array_keys($array); $values = array_fill(0, count($keys), null); $new_array = array_combine($keys, $values); 

Get the Keys

Get an array of nulls with the same number of elements

Combine them, using keys and the keys, and the nulls as the values

As comments suggest, this is easy as of PHP 5.2 with array_fill_keys

$new_array = array_fill_keys(array_keys($array), null); 

Answer 2

Fill array with old keys and null values

$array = array_fill_keys(array_keys($array), null)