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CREATE TABLE users ( email varchar(255), phone varchar(255), UNIQUE KEY (email), UNIQUE KEY (phone) ); INSERT INTO users VALUES ('this@mail.com','');
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<?php $connection = &$mysqli; $email = 'this@mail2.com'; $phone = '+121345679'; $stmt = $connection->prepare( "INSERT INTO users (email, phone) VALUES (?, ?)" ); $stmt->bind_param("ss", $email, $phone); try { $stmt->execute(); } catch (Exception $e) { die("Вы уже оставили заявку"); } echo "Заявка сохранена в системе";
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