smarty 逻辑运算符号

eq                               equal : 相等
neq                            not equal：不等于
gt                               greater than：大于
lt                                less than：小于
lte                              less than or equal：小于等于
gte                             great than or equal：大于等于
is even：                是偶数
is odd：                  是奇数
is not even：         不是偶数
is not odd                不是奇数
not：                         非
mod：                      取余
div by：                  被。。。除