require_once()或die()无法正常工作 [英] require_once () or die() not working

问题描述

有人知道为什么我的require_once()或die()吗?不管用.总是显示致命错误，而不是我输入die()的错误消息.参见下面的代码:

Does anyone know why my require_once () or die(); is not working. It's always shown the Fatal error instead of the error message that I key in into the die(). See below for my code:

require_once ('abc.php') or die("oops");

错误消息显示如下

致命错误:controller :: require_once()[function.require]:无法打开所需的'1'(include_path ='....."

"Fatal error: controller::require_once() [function.require]: Failed opening required '1' (include_path='....."

我键入的是

而不是消息(糟糕" ).

推荐答案

或的优先级高于require/require_once.因此php评估

or has a higher precedence than require/require_once. Therefore php evaluates

('abc.php') or die("oops")

，然后将结果传递给require_once. Or 接受两个布尔操作数. ('abc.php')计算为 true ，因此整个表达式为 true 和

before passing the result to require_once. Or takes two boolean operands. ('abc.php') evaluates to true therefore the whole expression is true and

require_once true;

被调用. require_once接受一个字符串，bool(true)-> string => 1 =>

is invoked. require_once takes a string, bool(true)->string => 1 =>

打开失败需要' 1 '

您不需要在那里的or die(...).如果无法读取该文件，则require_once仍将停止php实例.

You don't need the or die(...) there. If the file can't be read require_once will stop the php instance anyway.

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