file_put_contents fails when vfsStream::setup() was invoked twice.

[yvoyer]

I am using vfsStream to mock the file system as a service during the execution of a Symony app.

file_put_content() fails when creating another root dir was created.

Is there a way to have 2 root dirs, is it a bug or by design?

Steps to reproduce:

$root = vfsStream::setup('root');

mkdir($dir = $root->url() . '/test/code-65b3c45ed2883/64/1b/4e', 0777, true);
file_put_contents($dir . '/Works.txt', 'content');

$other = vfsStream::setup('other');

mkdir($dir = $root->url() . '/test/code-65b3c45ed2883/42/ff/91', 0777, true);

file_put_contents($dir . '/Fails.txt', 'content');
"PHP Warning:  file_put_contents(vfs://root/test/code-65b3c45ed2883/42/ff/91/Fails.txt): failed to open stream: "org\bovigo\vfs\vfsStreamWrapper::stream_open" call failed in ..."

Thank you for this great project.

[mikey179]

Basically by design: not intentional, but due to the limitations of user defined stream wrappers in PHP and the knowledge of the author when vfsStream was initially created*. You can only have one root dir at a time. The second call to vfsStream::setup() destroys the first representation of the file system, so reusing anything of that first one after that leads to undefined behavior. I'm not exactly sure, but I think the second call to mkdir() creates the new dir as a child of the "other" directory. In the second file_put_contents() call you are trying to put the file into vfs://root/test/code-65b3c45ed2883/42/ff/91/Fails.txt, but this directory doesn't exist then, as it would belong to the first file system which was abandoned, therefore the call fails.

*With the knowledge of today it could be changed in vfsStream, but not without a massive bc break.

[yvoyer]

@mikey179 would it be a feature you would be interested to add? I could check out how to implement it if you gave me some pointers.