RETURN TRUE 在 php 函数中做什么？
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What does RETURN TRUE do in a php function?
提问by Imran
I was just looking at this code and i don't understand what RETURN TRUE does or what the point of it is? Can someone please explain?
我只是在看这段代码，我不明白 RETURN TRUE 的作用或它的意义是什么？有人可以解释一下吗？
class Elephpant {
public $colour;
public function dance() {
echo "elephpant dances!\n";
return true;
}
}
Thankyou in advance ;-)
先感谢您 ;-）
采纳答案by Gordon
It returns the boolean TRUE to whatever called dance(). That's all.
它将布尔值 TRUE 返回到任何称为 dance() 的地方。就这样。
You would have to look at the consuming code to see if it makes something from it.
您将不得不查看使用代码以查看它是否从中产生了一些东西。
回答by Kyle Rozendo
In that specific piece of code - not very much.
在那段特定的代码中 - 不是很多。
In general however it would be used to return a condition of a validation or code that needs to return either a positive or a negative.
然而，通常它会用于返回需要返回正值或负值的验证或代码的条件。
For instance, one would do the following:
例如，您会执行以下操作：
public function isValidEmail($email) {
// do work to see if email is valid
if(/* Condition making it true */)
return true;
else
return false;
}
回答by Sirber
because it's TRUE, elephpant does dance ;)
因为它是TRUE，大象会跳舞；)
回答by Kemo
Logically, returns boolean TRUE, but in this case doesn't make any sense since it'll return TRUE anyways.
从逻辑上讲，返回布尔值 TRUE，但在这种情况下没有任何意义，因为它无论如何都会返回 TRUE。
回答by Jasper
Sometimes a method/function returns a boolean value to indicate if the operation was succesfull. In the given example it always returns "TRUE".
有时，方法/函数会返回一个布尔值来指示操作是否成功。在给定的示例中，它始终返回“TRUE”。
The calling code can then act upon succesfull completion of the code
然后调用代码可以在代码成功完成后采取行动
if(dance()) echo "succes" else echo "fails"
if(dance()) echo "succes" else echo "fails"
回答by Kamil Szot
You can read more about returnhere: http://www.php.net/return
您可以return在此处阅读更多信息：http: //www.php.net/return
There are few interesting applications of returnlike returning value from include-d file.
很少有有趣的应用程序return像从include-d 文件返回值。
