各种函数分开放置还是合在一起,该如何解决
各种函数分开放置还是合在一起
假设有许多个不相干的函数，是把它们集中在一个文件中还是分成许多文件放置？
不同的页面请求会调用到不同的函数。如果放在一个文件中，那每次请求可能只会用到文件中的一两个函数，其它函数完全没用到，是不是会造成PHP解析的浪费？但是如果放在不同的文件中（每个函数一个文件），会增加PHP读取文件的次数。所以该怎么权衡？
另外requre_once影响多少的速度？它应该要检查是否曾经包含过某个文件，但貌似看到说现在的效率比以前有提升。如果包含一个通用文件是require还是require_once？（用require的话可能被多次包含，会造成浪费吗？）
先感谢各位的回答~
------解决方案--------------------
想太多了，这个世界没有完美的东西。
我自己的做法是按照调用频率来放置函数文档.特殊情况特殊处理，如果有必要的还得分别复制(哈哈)
require_once
至于影响多少速度 我不关心...关心那点速度不如关心一下自己代码够不够健壮.
------解决方案--------------------
1、可以按使用频度划分成若干文件，本人建议就一个文件
2、如果你能保证不可能发生冲定义，那么你就用 require 否则就让 平衡品去判断，用require_once
------解决方案--------------------
开发过程中用require,require_once什么的都无所谓。到最后发布的时候，我会把原先要包含的文件全部复制进去，甚至注释换行什么的都得削掉。全部放到一个文件里去最好，毕竟中途再去读取一个文件要耽误不必要的时间
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