using splheap in php 5.2

Is there any way to use splheap in php 5.2? Ie. could I paste the classes somewhere? Specifically I want to use it to sort items in an iterator, I'm looking for the equiv开发者_Python百科alent of usort() on an iterator.

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SplHeap (as other classes provided by PHP itself) is not coded in PHP.

It is actually coded in C -- as the rest of PHP itself -- and, as such, cannot just be copy-pasted to your project.

The only way you'd have of getting those classes into PHP 5.2 would be to :

• Get the sources of PHP 5.3
• Get the sources of PHP 5.2
• Do some kind of merge between those -- merging the definitions of SplHead, and all it can depend upon
• And compile your own version PHP 5.2 + those merges

This doesn't seem like quite an easy task ; and I would not recommend doing it : your PHP code would only be able to work with your own version of "PHP 5.2+merges".

Instead, considering that PHP 5.2 has reached his end of life, it would be much wiser to upgrade to PHP 5.3.