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<?php $tests = ['derp.php', 'test.php']; array_map($tests, function($test) { return substr($test, 0, strrpos($test, '.')); }); var_dump($tests);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: array_map(): Argument #1 ($callback) must be a valid callback or null, class "derp.php" not found in /in/6uE5n:4 Stack trace: #0 /in/6uE5n(4): array_map(Array, Object(Closure)) #1 {main} thrown in /in/6uE5n on line 4
Process exited with code 255.

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