如何清除或删除SplStack中的所有元素？

Question

The SplStack has many functions for accessing its elements, but is there a way to clear it? Or should I "clear" my stack by replacing it with a new, empty stack?

Answer 1

There is no built-in method to clear a stack.

You'd either need to clear it down using pops or unsets:

while($stack->valid()) {
    $stack->pop();
}

Or unset the stack itself, and create a new one:

unset($stack);
$stack = new \SplStack();