PHP Classes

[Johnny]

Hi everybody,

I am trying to set up two classes in the following manner:

class adodb_connectio n
{
public function Execute($sSql)
{
//do something with $sSql here...
$this->Execute=new adodb_recordset ;
$this->Execute->Fields=5;
}
}

class adodb_recordset
{
public $Fields;
}


When i am trying to get the Fields variable of adodb_recordset at the
following manner, i get a "Notice: Trying to get property of non-object in
..." error.

=>>>>

$connMain = new adodb_connectio n;
//$rstMain = new adodb_recordset ;

$rstMain = $connMain->Execute('sql') ;
echo $rstMain->Fields;


1) Can someone tell me why this isn't working?
2) If i change $this->Execute->Fields=5; in function Execute to
$this->Execute->Fieldszzzzzzzz zzzzzzzzzzzz=5; i get no error...! Shouldn't
php come with an error stating that the variable Fieldszzzzzzzzz zzzzzzzzzzz
isn't found??


I hope that someone has the solution for me.

Thanks in advance..!

Johnny.

[=?iso-8859-1?Q?=C1lvaro?= G. Vicario]

Re: PHP Classes

*** Johnny escribió/wrote (Thu, 14 Aug 2008 19:25:46 +0200):

class adodb_connectio n
{
public function Execute($sSql)
{
//do something with $sSql here...
$this->Execute=new adodb_recordset ;
$this->Execute->Fields=5;
}
}
>
class adodb_recordset
{
public $Fields;
}
>
>
When i am trying to get the Fields variable of adodb_recordset at the
following manner, i get a "Notice: Trying to get property of non-object in
.." error.
>
=>>>>
>
$connMain = new adodb_connectio n;
//$rstMain = new adodb_recordset ;
>
$rstMain = $connMain->Execute('sql') ;
echo $rstMain->Fields;

Execute() doesn't return any value so $rstMain is NULL, not an object. I
guess you mean:

echo $connMain->Execute->Fields;


Also, class adodb_connectio n have both a property and a method (undeclared)
with the same name. Although PHP allows that, it looks pretty confusing.

2) If i change $this->Execute->Fields=5; in function Execute to
$this->Execute->Fieldszzzzzzzz zzzzzzzzzzzz=5; i get no error...! Shouldn't
php come with an error stating that the variable Fieldszzzzzzzzz zzzzzzzzzzz
isn't found??

I do get the very same error than above. In any case, in PHP it's optional
to declare class attributes.



--
-- http://alvaro.es - Álvaro G. Vicario - Burgos, Spain
-- Mi sitio sobre programación web: http://bits.demogracia.com
-- Mi web de humor en cubitos: http://www.demogracia.com
--

[Johnny]

Re: PHP Classes

Hi Álvaro,

Thank you for your quick response.

>Execute() doesn't return any value so $rstMain is NULL, not an object.

After adding the following line to method Execute, no more errors occured:

return $this->Execute;

>Also, class adodb_connectio n have both a property and a method
>(undeclared)
>with the same name. Although PHP allows that, it looks pretty confusing.

Do you mean when putting $this->Execute=new adodb_recordset ; in method
Execute, this isn't referencing the method Execute, but a new variable named
Execute??

Thanks,

Johnny



"Álvaro G. Vicario" <webmasterNOSPA MTHANKS@demogra cia.comschreef in
bericht news:1oicobora4 ats.84shtw1toxy 7$.dlg@40tude.n et...

*** Johnny escribió/wrote (Thu, 14 Aug 2008 19:25:46 +0200):

>class adodb_connectio n
>{
> public function Execute($sSql)
> {
> //do something with $sSql here...
> $this->Execute=new adodb_recordset ;
> $this->Execute->Fields=5;
> }
>}
>>
>class adodb_recordset
>{
>public $Fields;
> }
>>
>>
>When i am trying to get the Fields variable of adodb_recordset at the
>following manner, i get a "Notice: Trying to get property of non-object
>in
>.." error.
>>
>=>>>>
>>
>$connMain = new adodb_connectio n;
>//$rstMain = new adodb_recordset ;
>>
>$rstMain = $connMain->Execute('sql') ;
>echo $rstMain->Fields;

>
Execute() doesn't return any value so $rstMain is NULL, not an object. I
guess you mean:
>
echo $connMain->Execute->Fields;
>
>
Also, class adodb_connectio n have both a property and a method
(undeclared)
with the same name. Although PHP allows that, it looks pretty confusing.
>
>

>2) If i change $this->Execute->Fields=5; in function Execute to
>$this->Execute->Fieldszzzzzzzz zzzzzzzzzzzz=5; i get no error...!
>Shouldn't
>php come with an error stating that the variable
>Fieldszzzzzzzz zzzzzzzzzzzz
>isn't found??

>
I do get the very same error than above. In any case, in PHP it's optional
to declare class attributes.
>
>
>
--
-- http://alvaro.es - Álvaro G. Vicario - Burgos, Spain
-- Mi sitio sobre programación web: http://bits.demogracia.com
-- Mi web de humor en cubitos: http://www.demogracia.com
--

[=?iso-8859-1?Q?=C1lvaro?= G. Vicario]

Re: PHP Classes

*** Johnny escribió/wrote (Thu, 14 Aug 2008 21:54:11 +0200):

>>Also, class adodb_connectio n have both a property and a method
>>(undeclared )
>>with the same name. Although PHP allows that, it looks pretty confusing.

>
Do you mean when putting $this->Execute=new adodb_recordset ; in method
Execute, this isn't referencing the method Execute, but a new variable named
Execute??

Yes. In that sense PHP is different from JavaScript.

However, it wouldn't make much sense to have a function that commits
suicide the first time it's called :-?


--
-- http://alvaro.es - Álvaro G. Vicario - Burgos, Spain
-- Mi sitio sobre programación web: http://bits.demogracia.com
-- Mi web de humor en cubitos: http://www.demogracia.com
--