php 出口（）; 死（）; 返回假；
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exit(); die(); return false;
提问by daryl
Possible Duplicate:
what are the differences in die() and exit() in PHP?
I guess the main question is what is the difference between the 3 exactly?
我想主要问题是 3 之间到底有什么区别？
What is the correct semantic usage for each one of these?
每一个的正确语义用法是什么？
From what I see return false;can discontinue a function whereas die();and exit();will prevent any further code running at all.
从我看到return false;可以停止，而功能die();和exit();防止运行任何进一步的代码在所有。
Is this correct?
这样对吗？
回答by Ernest Friedman-Hill
die()and exit()are precisely identical; they halt the entire PHP program and return to the OS. They're two different names for the same function.
die()并且exit()完全相同；他们停止整个 PHP 程序并返回到操作系统。它们是同一功能的两个不同名称。
return, on the other hand, ends a function call and returns to the caller. At the end of a program, returnsets the status value that is returned to the OS; the program is going to exit no matter what.
return，另一方面，结束函数调用并返回给调用者。在程序结束时，return设置返回给操作系统的状态值；无论如何，程序都会退出。
回答by daryl
According to docs PHP: exit Manualdie()is an alias to exit()so they do the same function and that is to END the script.
根据文档PHP: exit Manualdie()是一个别名，exit()因此它们执行相同的功能，即结束脚本。
The returnstatement ends a function and not the entire script, and returns the value that you choose.
该return语句结束一个函数而不是整个脚本，并返回您选择的值。
