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<?php $maybeHasAB = ['a value']; $defaultAB = ['a default', 'b default']; [$a, $b] = ($maybeHasAB + $defaultAB); var_dump($a, $b); $a = $maybeHasAB[0] ?? $defaultAB[0]; $b = $maybeHasAB[1] ?? $defaultAB[1]; var_dump($a, $b);
Output for git.master, git.master_jit, rfc.property-hooks
string(7) "a value" string(9) "b default" string(7) "a value" string(9) "b default"

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