Description:
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A router script that calls 'chdir()' to set the working directory for scripts in subdirectories is not found in the next request.

The first request works fine, but the second request outputs an error.

The problem can be avoided using an absolute path for the router script in command line.

Test script:
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<?php

// a subdirectory "admin" is needed 
chdir(__DIR__.'/admin');

echo 'Hallo Welt';

Expected result:
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Hallo Welt

Actual result:
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Warning: Unknown: failed to open stream: No such file or directory in Unknown on line 0

Fatal error: Unknown: Failed opening required 'chdir-bug.php' (include_path='.;C:\php\pear') in Unknown on line 0