обрезка массива

function array_slice_assoc(array &$array, $offset, $length = null, $preserve_keys = false) {
    $array = array_slice($array, $offset, $length, $preserve_keys);
 
    return $array;
}
 
$arr = array(
    'a' => 1,
    'b' => 2,
    'c' => 3,
    'd' => 4
);
 
$arr = array_slice_assoc($arr, 1);
 
print_r($arr);