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<?php $a = isset($b) ? $b : -1; $a = $b ?? -1; echo $a; // results: -1 $a = null; $b = null; $c = 10; $d = null; var_dump ($a ?? $b ?? $c ?? $d); // results: 10
Output for git.master, git.master_jit, rfc.property-hooks
-1int(10)

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