Description:
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A user defined stream wrapper for the file protocol is called only once even if you reload your page.
It occurs when you include/require a file without the explicit file:/// protocol.
This independently of the allow_url_include value.

When the required path is prefixed with the file:/// protocol, the wrapper is correctly created on each page reload, which is the expected behaviour.

There should not be differences between requiring a file with or without specifying the file protocol.

Test script:
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please clone this repository https://github.com/eviweb/php-file-stream-wrapper-issue.git

check the execute permissions are set on the ./start-server script and run it.
Then go to http://localhost:8000.
Click twice on each links and check expected and actual test results.
I noticed on my environment that for the implicit-file test, the file stream wrapper instance is created only during the first run and nevermore.

Expected result:
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When registered, a user defined stream wrapper for the file protocol should be created on each page load when a file is included/required, even if the file path is not prefixed with file:///.

Actual result:
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The wrapper is created on the first page load and nevermore.