查找定义了类的 PHP 文件（在运行时）
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Finding the PHP File (at run time) where a Class was Defined
提问by Alan Storm
Is there any reflection/introspection/magic in PHP that will let you find the PHP file where a particular class (or function) was defined?
PHP 中是否有任何反射/内省/魔法可以让您找到定义特定类（或函数）的 PHP 文件？
In other words, I have the name of a PHP class, or an instantiated object. I want to pass this to something(function, Reflection class, etc.) that would return the file system path where the class was defined.
换句话说，我有一个 PHP 类的名称，或者一个实例化的对象。我想把它传递给一些东西（函数、反射类等），它会返回定义类的文件系统路径。
/path/to/class/definition.php
I realize I could use (get_included_files())to get a list of all the files that have been included so far and then parse them all manually, but that's a lot of file system access for a single attempt.
我意识到我可以使用 (get_included_files())来获取到目前为止包含的所有文件的列表，然后手动解析它们，但一次尝试需要大量的文件系统访问。
I also realize I could write some additional code in our __autoload mechanism that caches this information somewhere. However, modifying the existing __autoload is off limits in the situation I have in mind.
我也意识到我可以在我们的 __autoload 机制中编写一些额外的代码，将这些信息缓存在某处。但是，在我想到的情况下，修改现有的 __autoload 是禁止的。
Hearing about extensions that can do this would be interesting, but I'd ultimately like something that can run on a "stock" install.
听说可以做到这一点的扩展会很有趣，但我最终还是喜欢可以在“库存”安装上运行的东西。
回答by Gordon
Try ReflectionClass
尝试 ReflectionClass
- ReflectionClass::getFileName— Gets a filename
- ReflectionClass::getFileName— 获取文件名
Example:
例子：
class Foo {}
$reflector = new \ReflectionClass('Foo');
echo $reflector->getFileName();
This will return falsewhen the filename cannot be found, e.g. on native classes.
这将false在找不到文件名时返回，例如在本机类上。
回答by Jevin
For ReflectionClass in a namespacedfile, add a prefix "\" to make it global as following:
对于命名空间文件中的ReflectionClass ，添加前缀“\”使其成为全局的，如下所示：
$reflector = new \ReflectionClass('FOO');
$reflector = new \ReflectionClass('FOO');
Or else, it will generate an error said ReflectionClass in a namespace not defined. I didn't have rights to make comment for above answer, so I write this as a supplement answer.
否则，它会在未定义的命名空间中生成一个错误，表示 ReflectionClass。 我无权对上述答案发表评论，因此我将其写为补充答案。
回答by Seaux
if you had an includes folder, you could run a shell script command to "grep" for "class $className" by doing: $filename = ``grep -r "class $className" $includesFolder/*\and it would return which file it was in. Other than that, i don't think there is any magic function for PHP to do it for ya.
如果你有一个包含文件夹，你可以运行一个 shell 脚本命令来为“class $className”“grep”执行以下操作：$filename = ``grep -r "class $className" $includesFolder/*\它会返回它所在的文件。除此之外，我认为没有任何魔法PHP 为你做这件事的函数。
