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<?php $slug = 'my-url'; echo implode('', array_map(explode('-', $slug), function($part) { return ucfirst($part); }));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: array_map(): Argument #1 ($callback) must be a valid callback or null, class "my" not found in /in/Zs5vi:5 Stack trace: #0 /in/Zs5vi(5): array_map(Array, Object(Closure)) #1 {main} thrown in /in/Zs5vi on line 5
Process exited with code 255.

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