php – 对象的var_dump中的对象(someClass)旁边是什么？我有一个推论.我对吗？

这是代码&它的输出我用来画出如下推论：

class a {
    public $var1;
    public $var2;
    }

 $obj0 = new a;
 var_dump($obj0);

 class b {
    public $var1;
    public $var2;
    public $var3;
    }

 $obj1 = new b;
 var_dump($obj1);

 $obj2 = new stdClass;
 var_dump($obj2);

 $obj3 = new stdClass;
 var_dump($obj3); 

 $obj4 = new stdClass;
 var_dump($obj4);

 $obj5 = new stdClass;
 var_dump($obj5);

 var_dump(new stdClass); 

 $obj6 = new stdClass;
 var_dump($obj6);

输出：

object(a)#1 (2) {
  ["var1"]=> NULL
  ["var2"]=> NULL
}
object(b)#2 (3) {
  ["var1"]=> NULL
  ["var2"]=> NULL
  ["var3"]=> NULL
}
object(stdClass)#3 (0) {

}
object(stdClass)#4 (0) {

}
object(stdClass)#5 (0) {

}
object(stdClass)#6 (0) {

}
object(stdClass)#7 (0) {

}
object(stdClass)#7 (0) {

}

#< some-number>在对象的var_dump中的行对象(someClass)旁边实际上是#< count&gt ;.哪里,

count is the number of objects / zval’s for objects irrespective of which class it belongs to that has been created till Now. Which keeps getting incrementing for every object created & gets decremented by 1 when a refcount of a zval reaches zero i.e. Garbage Collection.

我对吗？

该数字是Z_OBJ_HANDLE_PP(struc),其中struc是一个zval,它导致Z_OBJVAL(zval).handle,它导致(zval).value.obj.

参见http://php.net/manual/en/internals2.variables.intro.php

总之我会说这是object identifier用十进制格式写的(ref)：

PHP_printf("%sobject(%s)#%d (%d) {\n",COMMON,class_name,Z_OBJ_HANDLE_PP(struc),myht ? zend_hash_num_elements(myht) : 0);

而不是创建的对象的数量.

原文地址：https://www.jb51.cc/php/139754.html