php require方法中的类调用 [英] php require class call from inside method

问题描述

从我的理解，需要粘贴代码到调用php文件。

from my understanding, require pastes code into the calling php file.

如果你要求从一个方法...它会粘贴整个代码/

what if you were requiring from inside a method...it would paste the entire code/class inside the method, blocking the next statement in the method.

例如

  function test() {

    require 'pathtosomeclasscode';
    somestatement; // any code after the require is blocked.

 }

如何解决这个问题，

推荐答案

有些令人惊讶的是，这似乎工作得很好。所包含的代码将在Baz :: bork（）的范围内执行 - 但是代码只是定义了一个类，而类是全局的。

Somewhat surprisingly, this appears to work just fine. The included code will execute inside the scope of Baz::bork() -- but the the code simply defines a class, and classes are global. So you end up with a defined class.

文件：Foo.php：

File: Foo.php:

<?PHP
class Foo{
      function bar(){
               echo "Hello from Foo::bar()!\n";
      }
}

档案：Baz.php：

File: Baz.php:

<?PHP
class Baz{

      function bork(){
               require_once "Foo.php";
               $f = new Foo();
           $f->bar();
      }
}

echo "testing internal definition:\n";
$b = new Baz();
$b->bork();

echo "\ntesting in global scope:\n";

$f = new Foo();
$f->bar();
echo "\nall done\n";

输出：

$ php Baz.php
testing internal definition:
Hello from Foo::bar()!

testing in global scope:
Hello from Foo::bar()!

all done

现在，我想不到很多地方你会想这样做的事情。人们通常在类定义之外的类文件的顶部require_once（）任何可能的依赖。

Now, I can't think of many places where you'd want to do things this way. People typically require_once() any possible dependencies at the top of their class file, outside of the class definition.

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