I have this appearing hundreds of times in my error log - what does it mean?
[07-Jul-2016 15:24:20 UTC] PHP Notice: Only variables should be passed by reference in /home/<serveruser>/public_html/forums/includes/vb5/frontend/applicationlight.php on line 155
[07-Jul-2016 15:24:20 UTC] PHP Notice: Only variables should be passed by reference in /home/<serveruser>/public_html/forums/includes/vb5/frontend/applicationlight.php on line 155
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