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<?php echo is_null($x); echo $x == null; echo empty($x); echo (bool) $x;
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $x in /in/gDsk3 on line 2 1 Warning: Undefined variable $x in /in/gDsk3 on line 3 11 Warning: Undefined variable $x in /in/gDsk3 on line 5

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