Serious considerations before upgrading to PHP 5.3

[ Thanks to An Anonymous Reader for this link. ]

"Though there are no major changes to functions and methods in PHP V5.3, there are a few enhancements to help with outstanding issues in PHP and to improve performance. This section discusses a few of the more notable changes.

"In previous versions of PHP, the array functions atsort, natcasesort, usort, uasort, uksort, array_flip, and array_unique let you pass objects instead of arrays as parameters. The functions then treat the properties of the objects as the array keys and values. This is no longer available in PHP V5.3, so you need to cast the objects to arrays first. Listing 3 shows how to change your code."

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