PHPslash and PHP version

Hi All,

According to the requirements list of PSL I need to run on php 4.1.x as a 
minimum.
However, I have a production environment still running 4.0.4pl1. Upgrading 
is no option, unfortunately

I noticed that the PSL code contains specific php4.1 function 
'array_key_exists()', which is not supported by 4.0.x
I guess I can do a back port of the function mentioned, but I'd like to 
know if it is worth the effort.
Is there anything else I have to deal with?

Thanks,
Peter



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