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<?php $lala; var_dump(isset($lala)); var_dump(null == $lala); var_dump(null === $lala);
Output for git.master, git.master_jit, rfc.property-hooks
bool(false) Warning: Undefined variable $lala in /in/iIc3T on line 6 bool(true) Warning: Undefined variable $lala in /in/iIc3T on line 7 bool(true)

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