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Re: out of sheer curiosity... [message #177608 is a reply to message #177606] Tue, 10 April 2012 18:23 Go to previous messageGo to previous message
M. Strobel is currently offline  M. Strobel
Messages: 386
Registered: December 2011
Karma:
Senior Member
Am 10.04.2012 20:10, schrieb Thomas Mlynarczyk:
> M. Strobel schrieb:
>
>> In your example above the problem is if you need to do more init work on the data you
>> need an extra method call. With the implemented solution you just have to know that
>> the constructor is called after setting the vars, and you can detect it, testing the
>> unique key or so, but need not do so if you don't care.
>
> Hm, yes, but it still feels wrong to me that the constructor call is not the very
> first thing happening to the object.
>
>> Are you aware of the fact that __set() is not called for defined variables?
>
> Yes, it's not called for defined /public/ variables. But you rarely have public
> variables in your classes.
>
>> The rationale (or use case) of __set_state() is a mystery to me.
>
> Well, it's used by var_export() when exporting objects. For example,
>
> $a = (object) array( 'foo' => 'bar' );
>
> will be exported as
>
> stdClass::__set_state(array( 'foo' => 'bar', ))
>
> even though PHP should know very well that stdClass has no such static method.
> Consequently, writing the output of var_export() to a file and then re-including it,
> will fail, thus defeating the whole purpose of var_export(). Test code:
>
> $a = (object) array( 'foo' => 'bar' );
> $s = var_export( $a, true );
> var_dump( $a, $s );
> $b = eval( "return $s;" );
> var_dump( $b );
>
> But __set_state() seems to be some sort of "factory method" which is called as a
> static method on a class, passing an array with "state information" and the method is
> supposed to create an object, set its state using the passed array and return the new
> object. And that would be exactly what PDO needs to set the data of the row object:
> no need to define an array with extra constructor arguments -- just tell PDO the
> class name and make sure the class has a __set_state() method defined. But alas, it's
> not what PDO does.

Still a mystery, why should I want to do var_export()? And your code gives a fatal error.

<shrug> but it's late here, getting dark

/Str.

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