Fixing Warning on HHVM

[gadelkareem]

\nWarning: Parameter 1 to W3_Plugin_TotalCache::ob_callback() expected to be a reference, value given in /wp-includes/functions.php on line 3269

[alex-wsul]

Thank you, solved to me too!

[Danw33]

@gadelkareem Thanks for this! Seems to have sorted our issue with HHVM and W3 Total Cache.

Hopefully someone can get the developers to finally add this to the "next release" as they have promised since 2014.

[mef]

l also would like this bug to be fixed. This pull request is not likely to help much though, cf. repository description:

Unofficial mirror repository; no pull requests, please.

[josflachs]

I got this problem on Saturday (29-04-2016) after installing the plugin. This fix did make the waring disappear, but also most of the web content...

[LucianoBellacci]

I still have the problem on my site luciano-bellacci.dk and company site Waimea.dk. It seems that the plugin is updated to the newest version..

[v2v-technologies]

Replacing function ob_callback(&$buffer) with function ob_callback($buffer) gives me a white page of death on php7 any ideas?