commit and rollback

Hi,

I have a problem about commit and rollback using php. For the script below,
if "foo" is called and commit and if rollback statment also run. Will the
update statement under foo also rollback? or commit?

Thanks in advance!

----------------------------------------------------------------------------
-----------Script starts
function foo(var1,var2)
{
   pg_query($db,"begin");
   pg_query($db,"<update statement here>");
   pg_query($db,"commit");
}


pg_query($db,"begin");

.....
foo(v1,v2);

$result1=pg_query($db,"<update statment here>");
if (pg_affected_rows($result)==0)
    pg_query($db,"rollback");
else
    pg_query($db,"commit");

----------------------------------------------------------------------------
-----------Script end



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