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Re: Consistency with object to boolean conversions

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Am 2014-12-03 um 17:42 schrieb Matthew Carter:
> Gregor Kofler <usenet@gregorkofler.com> writes:
>
>> Am 2014-12-03 um 16:19 schrieb Christoph M. Becker:
>>> Gregor Kofler wrote:
>>>
>>>> The following example should suffice to describe my problem:
>>>>
>>>> 50 if(!$file) {
>>>> 51 }
>>>> 52 else {
>>>> 53    echo '$file is an object.';
>>>> 54    var_dump(!$file);
>>>> 55 }
>>>>
>>>> results in
>>>>
>>>> "$file is an object.
>>>>
>>>> Catchable Fatal Error: Object of class
>>>> Symfony\Component\HttpFoundation\File\UploadedFile could not be
>>>> converted to boolean in
>>>> /var/www/strbase_client/src/Strbase/ClientBundle/Controller/BatchController.php
>>>> line 54"
>>>>
>>>> Why does the object to boolean conversion in the if condition in line 50
>>>> *not* cause an error?
>>>
>>> What gets printed when you change line 51 to:
>>>
>>>     var_dump($file);}
>>>
>>> I guess that answers your question.
>>
>>
>> Erm... no. Line 51 is not reached - hence I get precisely the same
>> output as above.
>> $file exists and is a UploadedFile instance.
>>
>>
>
> This works for me:
>
> class a {}
>
> $b = new a ();
>
> if (!$b)
>    {
>    }
> else
>    {
>      echo '$a is an object!';
>      var_dump (!$b);
>    }
>
> Maybe its an issue related to your specific class?

I suppose. I just found

https://bugs.php.net/bug.php?id=65213

...and the returned object has SplFileInfo on top of its class hierarchy.

Gregor

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Thread

Consistency with object to boolean conversions Gregor Kofler <usenet@gregorkofler.com> - 2014-12-03 15:56 +0100
  Re: Consistency with object to boolean conversions "Christoph M. Becker" <cmbecker69@arcor.de> - 2014-12-03 16:19 +0100
    Re: Consistency with object to boolean conversions Gregor Kofler <usenet@gregorkofler.com> - 2014-12-03 16:39 +0100
      Re: Consistency with object to boolean conversions Matthew Carter <m@ahungry.com> - 2014-12-03 11:42 -0500
        Re: Consistency with object to boolean conversions Gregor Kofler <usenet@gregorkofler.com> - 2014-12-03 18:06 +0100
          Re: Consistency with object to boolean conversions Matthew Carter <m@ahungry.com> - 2014-12-03 13:13 -0500
  Re: Consistency with object to boolean conversions Denis McMahon <denismfmcmahon@gmail.com> - 2014-12-03 16:46 +0000
    Re: Consistency with object to boolean conversions Gregor Kofler <usenet@gregorkofler.com> - 2014-12-03 18:09 +0100
      Re: Consistency with object to boolean conversions "Christoph M. Becker" <cmbecker69@arcor.de> - 2014-12-03 18:22 +0100
        Re: Consistency with object to boolean conversions Gregor Kofler <usenet@gregorkofler.com> - 2014-12-03 19:12 +0100
          Re: Consistency with object to boolean conversions "Christoph M. Becker" <cmbecker69@arcor.de> - 2014-12-03 19:30 +0100
            Re: Consistency with object to boolean conversions Gregor Kofler <usenet@gregorkofler.com> - 2014-12-03 20:58 +0100

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