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<?php $a == 'x'; var_dump($a); $b = 'y'; var_dump($b);
Output for git.master, rfc.property-hooks, git.master_jit
Warning: Undefined variable $a in /in/Hcm9d on line 3 Warning: Undefined variable $a in /in/Hcm9d on line 4 NULL string(1) "y"

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