php - 取消设置对象数组是只取消设置数组还是取消所有对象？

Question

我有一个对象数组。如果我调用 unset($array)，它会取消设置数组和数组中的所有对象还是仅取消设置数组？让我们假设这些对象在其他任何地方都没有被引用。

Answer 1

如果该数组包含对该对象的唯一引用，则是。否则没有。另外，从 PHP 文档中要记住的事情:

unset() does just what it's name says - unset a variable. It does not force immediate memory freeing. PHP's garbage collector will do it when it see fits - by intention as soon, as those CPU cycles aren't needed anyway, or as late as before the script would run out of memory, whatever occurs first.