var_dump(
  $person->firstName,
  empty($person->firstName)
);

var_dump(
  $person->firstName,
  empty($person->firstName),
  isset($person->firstName),
  is_null($person->firstName)
);

class person
{  protected $attributes = [];
  public function __construct(array $attributes)
  {
    $this->attributes = $attributes;
  }
  public function __get($name)
  {
    return $this->attributes[$name] "htmlcode">

class Person
{
  protected $attributes = [];
  public function __construct(array $attributes)
  {
    $this->attributes = $attributes;
  }
  public function __get($name)
  {
    return $this->attributes[$name] "htmlcode">

var_dump(
  $person->firstName, 
  empty($person->firstName)
);


新的检测结果：

string(5) "Freek"

bool(false)

总结
以上所述是小编给大家介绍的php empty 函数判断结果为空但实际值却为非空的原因解析，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！