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b1e854f776
Always duplicate the array before doing a sort with user-defined comparison function, to avoid access to the intermediate inconsistent state. I've also dropped the "array modification" warning, as protection against modifications is no longer relevant if we're always working on a copy anyway. This also required some changes to how SplArray forwards calls to sorting functions.
This is an extension that aims to implement some efficient data access interfaces and classes. You'll find the classes documented using php code in the file spl.php or in the corresponding .inc file in the examples subdirectory. Based on the internal implementations or the files in the examples subdirectory there are also some .php files to experiment with. For more information look at: http://php.net/manual/en/book.spl.php