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<?php define('NULL','hello world'); $a; if($a==NULL){ echo 'ok'; }else{ echo 'bad'; } ?>
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Constant NULL already defined in /in/LHnRr on line 2 Warning: Undefined variable $a in /in/LHnRr on line 4 ok

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