我有一个受保护的函数，它创建了一个类对象
protected function x() {
$obj = new classx();
}
现在我需要从不同的函数访问类对象的方法（我不想再次初始化）。
protected function y() {
$objmethod = $obj->methodx();
}
我该怎么做？
哦，这两个函数都存在于同一个类中，比如说"class z｛｝"
错误消息为
Fatal error: Call to a member function get_verification() on a non-object in
将$obj，classx的实例存储在ClassZ的属性中，可能作为private属性。在ClassZ构造函数或其他初始化器方法中初始化它，并通过$this->obj访问它。
class ClassZ {
// Private property will hold the object
private $obj;
// Build the classx instance in the constructor
public function __construct() {
$this->obj = new ClassX();
}
// Access via $this->obj in other methods
// Assumes already instantiated in the constructor
protected function y() {
$objmethod = $this->obj->methodx();
}
// If you don't want it instantiated in the constructor....
// You can instantiate it in a different method than the constructor
// if you otherwise ensure that that method is called before the one that uses it:
protected function x() {
// Instantiate
$this->obj = new ClassX();
}
// So if you instantiated it in $this->x(), other methods should check if it
// has been instantiated
protected function yy() {
if (!$this->obj instanceof classx) {
// Call $this->x() to build $this->obj if not already done...
$this->x();
}
$objmethod = $this->obj->methodx();
}
}