【PHP】界别include(),require(),include_once(),require

【PHP】界别include(),require(),include_once(),require_once()

日期：2014-05-17　浏览次数：20399 次

【PHP】区分include(),require(),include_once(),require_once()

  作者:zhanhailiang 日期:2013-03-19

1.include()与require()的区别(同理可区分include_once()与require_once())

include(),require()语句包含并运行指定文件。这两种结构除了在如何处理失败之外完全一样。

include()产生一个警告而require()则导致一个致命错误。换句话说，如果想在遇到丢失文件时停止处理页面就用 require()。include()就不是这样，脚本会继续运行

例1：include()产生一个Warning而require()则导致一个Fatal error。

zhanhailiang@linux-06bq:~> php -r "include('a.php');"
 
Warning: include(a.php): failed to open stream: No such file or directory in Command line code on line 1
 
Warning: include(): Failed opening 'a.php' for inclusion (include_path='.:/usr/local/services/phplib/src:/usr/local/services/phplib/inc:/usr/local/services/php/lib/php') in Command line code on line 1
zhanhailiang@linux-06bq:~