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php中require跟include的几点区别

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Release： 2016-06-13 10:40:12
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php中require和include的几点区别

  • 如果php.ini配置文件配置了URL fopen wrappers, 那么require可以使用URL包含远程文件的调用
  • require中不能包含控制结构, 而且不能包含return语句, 会产生处理错误.
  • require会在第一次执行的时候, 将被包含文件的内容替换至此, 而include每次调用都会重新调用.所以require不可以在循环体重包含不同的文件.
  • require可以访问当前作用域中的变量
  • require发生错误会立即停止运行, 报出异常, 而include显示错误信息后, 继续执行.
  • 在条件语句中的require, 不管该条件是否成立, 被包含的内容都会被引入, 哪怕没有执行的机会.

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