如何检查SimpleXMLElement对象的属性是否存在 - PHP

Question

In the below code I'm trying to access @attributes of Userinfo as $somevariable->Userinfo->attributes(); which is perfectly fine, but when there is no @attributes it throws an error

Call to a member function attributes() on null

[Userinfo] => SimpleXMLElement Object
(
    [@attributes] => Array
        (
            [UserId] => 121
            [UserName] => Arun, Singh
            [UserEmail] => [e-mail]
            [CreatedDate] => 06/27/2018 08:44:21
        )

)

So, before accessing @attributes, how to check if it exist ?

Thank you.

Answer 1

You can use !empty()

if(!empty($somevariable->Userinfo->attributes())){
  // do stuff here
}

Sample output:- https://3v4l.org/R32Bv

Or you can use isset() too

if(isset($somevariable->Userinfo)){
  // do stuff here
}