获取同一目录的子文件夹中的文件

I have a structure like this:

currentFolder
    currentFile.php
    email
        email.php

I'm in the file currentFile.php and need to include the email.php file.

I've tried to include email/email.php and include /email/email.php but neither will work?

What's the actual url to include this email.php into currentFile.php?

You need enclose your strings with either single or double quote marks. Like so:

include 'email/email.php';

If your string begins with a / chatracter, PHP will only look from the root of the filesystem. (Instead of relative to your current file)

So include '/email/email.php'; will look here:

/email/email.php

And include 'email/email.php'; will look here:

/currentFolder/email/email.php

Use constant DIR to know the directory located the current file.

include DIR.'/email/email.php

Better use __DIR__ on this case. Try this:

require_once __DIR__ . "\email\email.php"

But only works on PHP 5.3 <