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Jani Hartikainen's Blog:
Base classes in OOP programming languages
November 19, 2008 @ 16:10:58

Jani Hartikainen has followed up on a post from David Otten about standard classes in PHP and how they provide the base for much of what the language does.

David Otton posted a short but thought-provoking post about stdClass, which many think is the "base class" all PHP classes automatically inherit from. I have to admit that I had this misconception as well. [...] This [difference in PHP from other OOP languages] presents some room for analysis in how things are handled in dynamic and static languages, and how those differences affect things...

Jani talks about dynamic and static typing in languages and how that effects the base types things are extended from as well as some of the benefits that having a standard base class affords developers.

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base class programming language oop stdclass standard inherit


David Otton's Blog:
PHP Tip Classes Aren't Derived From stdClass
November 16, 2008 @ 10:54:53

David Otton has shared a discovery he's come across in his development - user-defined classes are not derived from stdClass.

Many OO languages have the concept of a single base class from which all other classes are explicitly or implicitly descended. For example, Ruby, Java and .NET all have Object. It's a very common belief that PHP implements stdClass as a base class for all objects, but this is in fact not the case.

He illustrates with a code example showing the results of calls to instanceof with a normal user class and one that extends the stdClass object.

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class stdclass standard example instanceof



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