regular expression question

[Graeme McLaren]

Afternoon all, I'm trying to to a regular expression to search and replace + 
with \+

I need to escape the + because it is getting used as an operator instead of 
a literal string, this is what I have so far:

$terms[$i] =~ s/\+ /\ \\\+/g;
Basically the result of searching for c++ should return results containing 
that string.

The error I'm getting is this:
DBD::mysql::st execute failed: Got error 'repetition-operator operand 
invalid' from regexp


Any ideas?
Cheers,
G :)
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