Before you develop a marketing strategy, you should ask yourself what your business strategy is. Your marketing strategy should be based on your business strategy and brand strategy. Your marketing strategy is not equal to your business strategy.
引用计数
对于php中unset函数的认识
unset($var)函数是我们经常会用到的函数。它的基本意思就是将传入的实参$var变量删除。我一直以为它就是直接把变量从内存中删掉了,从来没有多想,也没有详细阅读过php文档。 直到最近遇到一个问题,我才正确认识了它。