On Tue, Feb 1, 2011 at 4:47 PM, agentzh <agentzh@gmail.com> wrote:
> Consider the following config snippet:
>
>    location /test {
>        set $a 3;
>        if ($a = 3) {
>            set $a 4;
>        }
>        echo $a;
>    }
>
> GET /test will give you nothing for nginx 0.7.21 ~ 0.9.4.

Forgot to mention that we've been in favor of ngx_lua's set_by_lua and
rewrite_by_lua directives to do something like this:

location /test {
set $a 3;
set_by_lua $a '
if ngx.var.a == "3" then
return 4
end
';
echo $a;
}

and GET /test will give you the expected answer, "4" and the
performance remains outstanding especially when you've enabled LuaJIT
2.0 ;)

Cheers,
-agentzh

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