Memory Refresh



Array,  
Operations

1) You are checking to see if an array key exists. Which is correct?




2) Which array function do you use for the required result? <?php $a = array('a', 'b'); $b = ... print_r($b); // Array ( [0] => b [1] => a )





3) To advance the pointer of an array, what do you use?





4) Is it bad to use foreach with variable reference? <?php foreach($arr as &$v): ?>




0 / 0