Re: Consistency with object to boolean conversions

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From	Matthew Carter <m@ahungry.com>
Newsgroups	comp.lang.php
Subject	Re: Consistency with object to boolean conversions
Date	Wed, 03 Dec 2014 11:42:49 -0500
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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?


-- 
Matthew Carter (m@ahungry.com)
http://ahungry.com

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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