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<?php $data = ["user" => "Alice", "score" => 0, "email" => null]; echo "<p>User: " . ($data["user"] ?? "Unknown") . "</p>"; echo "<p>Score: " . ($data["score"] ?? "N/A") . "</p>"; echo "<p>Email: " . ($data["email"] ?? "No email") . "</p>"; echo "<p>Phone: " . ($data["phone"] ?? "No phone") . "</p>"; echo "<p>isset score: " . (isset($data["score"]) ? "yes" : "no") . "</p>"; echo "<p>empty score: " . (empty($data["score"]) ? "yes" : "no") . "</p>"; ?>
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