);   assertEquals($list0, array('Spock', 'McCoy'), 'remove first list');   $list0 = array('Kirk', 'Spock', 'McCoy');   array_shift(true ? $list0 : null);   assertEquals($list0, array('Spock', 'McCoy'), 'remove first order list');   $list0 = array('Kirk', 'Spock', 'McCoy');   array_pop(