What are PHP 5.2 settnigs which affect compatibility with old code (developed for PHP 4 and 3)?

Posted by Ivan on Stack Overflow See other posts from Stack Overflow or by Ivan
Published on 2010-03-12T01:41:01Z Indexed on 2010/03/12 1:47 UTC
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What are PHP 5.2 settnigs which affect compatibility with old code (developed for PHP 4 and 3)?

A web application using XTemplate 0.2.4-2 (officially meant for 3.0.11) works fine on one server running PHP 5.2 but works incorrect (seems that the form can't be submitted or processed correctly) on new PHP 5.2 and 5.3 installations. What may I need to tweak on new servers to make them able to run legacy code?

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