[Typo3-dev] cObj Error when using hook

[Thomas Mammitzsch]

Martin Kutschker schrieb:
> Thomas Mammitzsch schrieb:
> 
>> Dmitry Dulepov schrieb:
>>  > Thomas Mammitzsch wrote:
>>
>>>
>>>> i try to use a hook within css_styled_content in typo 3.8.1 with my
>>>> extension. I want to use an own render_uploads() function (in fact i
>>>> use
>>>> a copy of the original, only some html-rendering will be changed). but
>>>> if i use the _unchanged_ copy of this function in my ext i get this
>>>> error:
>>>>
>>>> Fatal error: Call to a member function on a non-object in
>>>> D:\xampp\xampp\eclipse\workspace\typo3.8.1\typo3conf\ext\user_fileupload\pi1\class.user_fileupload_pi1.php
>>>>
>>>> on line 52
>>>>
>>>> i commented out this lines and the error message disappeared:
>>>>
>>>> line 52:
>>>> $fileList = $this->cObj->stdWrap($this->cObj->data['media'],$lConf);
>>>>
>>>> line 132:
>>>> $out = $this->cObj->stdWrap($out, $conf['stdWrap.']);
>>>>
>>>> i really don't have an idea, why this doesn't work. maybe you can
>>>> help me?
>>>
>>>
>>>
>>>
>>> You do not have cObj member in your class right? :) this is why error
>>> appears. You probably can use $GLOBALS['TSFE']->newCObj() to get cObj.
>>>
>>> Dmitry.
>>
>>
>>
>> hi,
>>
>> i didn't know that i have to create an instance of Cobj first.
>> css_styled_content also doesn't do this. i thougt this would be done
>> outside of my extension....
>>
>> i tried it and put it in my function, but it still doesn't work and
>> throws the same error as before.
> 
> 
> Ahem, the call references $this. Anyway, AFAIR, all hook functiosn have
> a reference in $params['pObj'], so you can access the properties of the
> "parent" object.
> 
> Masi
using $this->pObj->cObj instead of $this->cObj worked out, thanks! But i
still don't understand why $this->cObj doesn't exist in my extension. As
far as i've seen most other extensions use $this->cObj without
instanciating it.
I'm a beginner in writing extensions for typo3, but i want to understand
how things work, so i would appreciate an possible explanation.

regards, Thomas