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<?php $pattern = '/^([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*[\/\\\\]?)*[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*$/D'; $class = 'Foo'; var_dump(preg_match($pattern, $class));
Output for git.master, git.master_jit, rfc.property-hooks
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