Corrected the Package name

Simply do:

$extensions = array_merge(get_loaded_extensions(), get_loaded_extensions(true));

Its most likely we will never add such an option to get both when it can be done that easily in userland PHP code.

Won't fix is the correct status.

Why to merge the array returned by get_loaded_extensions(true), if it returns nothing. get_loaded_extensions(true) returned me empty array on both WinXP and Win7.  And if  I follow your solution, how to get Zend extensions only as discussed in manual?

I assume you are confused by the term "Zend Extension". A Zend Extension is a special module which effects the core engine, like a debugger or such. Most likely you don't have such an extension enabled.

Making this a doc issue as the documentation isn't clear about the fact that, get_loaded_extensions(true) lists Zend exts only.

Thanks johannes @php.net. You are right. 
Sorry to trouble you all.

Actually I have point to get confused. On my home laptop, I have xDebug loaded. but I could not make difference because of get_loaded_extensions(); is listing xDebug with other extensions, whereas I expect it should not come in this list. Because default value is false. 
get_loaded_extensions(true); is only listing zend extension. In my case output is xDebug. Which is right. 
Now, I need to check if xDebug extension comes in both category for a reason!

This bug has been fixed in the documentation's XML sources. Since the
online and downloadable versions of the documentation need some time
to get updated, we would like to ask you to be a bit patient.

Thank you for the report, and for helping us make our documentation better.