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On Friday, June 3, 2022 at 8:10:54 AM UTC+2, J.O. Aho wrote:
> On 02/06/2022 22.32, Meredith Montgomery wrote:
> > Sorry about the incomplete subject. I'm fixing that. I think I also
> > understood a bit more about the code I'm asking, so I'm going to add an
> > addendum. Sorry about this small mess.
> >
> > Meredith Montgomery <mmont...@levado.to> writes:
> >
> >> The file
> >>
> >> PayPal/Common/ReflectionUtil.php
> >>
> >> --- whose content I show entirely below --- seems to be a class with
> >> only static methods and static properties. Now, check the procedure
> >>
> >> public static function propertyAnnotations($class, $propertyName)
> >>
> >> It contains the chunk
> >>
> >> if (!($refl =& self::$propertiesRefl[$class][$propertyName])) {
> >> $getter = self::getter($class, $propertyName);
> >> $refl = new \ReflectionMethod($class, $getter);
> >> self::$propertiesRefl[$class][$propertyName] = $refl;
> >> }
> >>
> >> So $refl is instantiated and it is stored in
> >>
> >> self::$propertiesRefl[$class][$propertyName]
> >>
> >> which is a private static array. This means it cannot be acessed from
> >> the ``outside''. Also, no other chunk in this class uses
> >> $propertiesRefl.
> >>
> >> Question. Why are they storing $refl if nobody uses it all, not even
> >> the very class that defines it?
> >
> > Actually, it clearly does use $refl. It's used right at the first line
> > in the chunk above. It is set merely so the if-inner-code is only
> > executed once in its lifetime. Why? Can you just clarify to me what's
> > going on this class? I'm not understanding it too clearly. Thank you!
> Yes, the inner code in this section will be called once for each
> combination of "class" and "propertyName".
> The function will return a array of annotations (read a bit about it
> here: https://www.educba.com/php-annotations )
>
> It's most likely used to setup correct check for input values client
> side and maybe even for post value validation.
>
> --
>
> //Aho