Description:
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---
From manual page: http://www.php.net/function.array-rand
---

From the manual:
"If you are picking only one entry, array_rand() returns the key for a random 
entry. Otherwise, it returns an array of keys for the random entries"

That causes problems as this functionality is unexpected. Functions should always 
return the same type (or false / null for failure)

Expected result:
----------------
get an array regardless of the number of results

Actual result:
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the function returns an integer for one result and an array for multiple results