I tried to install semantic Media Wiki extension and when I click on the "Initialise tables" button I receive the following error: 

Fatal error: Call to undefined function export() in /var/www/html/extensions/SemanicMediaWiki/includes/SMW_Storage.php on line 338

I see in the talk page of the wiki that other people have had the same problem. Do you have some suggestion to resolve it?

Thanks in advance 


P.S. I have successully installed the version 0.4 of semantic MediaWiki in fact in this version the SMW_Storage dose not contains a call to export function