I'm looking through various documentation on MDB2

In some examples the assignment operator looks like it is mixed with a bitwise or logic operator - IE

$mdb2 =& MDB2::factory($dsn);

Other examples though just have

$mdb2 = MDB2::factory($dsn);

I'm trying to figure out exactly what =& does, why people would use it, and when it is appropriate to use, but I haven't found anything and I think my google skills need some practice as I don't know how to search for =& in google.

In the php manual on operators I did fine &= discussed but that's the flip and it's use makes no sense in the context of setting a database handle.

Any tips would be appreciated.

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