Be careful with using this function as it's not available for anything before PHP 7.2, use the length property instead
(PHP 7 >= 7.2.0, PHP 8)
DOMNodeList::count — Get number of nodes in the list
此函数没有参数。
Returns the number of nodes in the list, which is identical to the length property.
Be careful with using this function as it's not available for anything before PHP 7.2, use the length property instead