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Code Duplication    Length = 14-14 lines in 2 locations

validators/newUser.php 2 locations

@@ 13-26 (lines=14) @@
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    $db_connection = masterConnect();
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    switch ($_POST['type']) {
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        case 'email':
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            if (isset($_POST['user_email'])) {
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                $email = $_POST['user_email'];
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                $sql = "SELECT `user_id` FROM `users` WHERE `user_email` = '" . $email . "';";
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                $result_of_query = $db_connection->query($sql);
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                if (mysqli_num_rows($result_of_query) == 1) {
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                    $isAvailable = false;
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                } else {
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                    $isAvailable = true;
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                }
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            } else {
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                $isAvailable = false;
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            }
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            break;
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        case 'username':
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            if (isset($_POST['user_name'])) {
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                $username = $_POST['user_name'];
@@ 27-40 (lines=14) @@
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                $isAvailable = false;
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            }
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            break;
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        case 'username':
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            if (isset($_POST['user_name'])) {
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                $username = $_POST['user_name'];
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                $sql = "SELECT `user_id` FROM `users` WHERE `user_name` = '" . $username . "';";
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                $result_of_query = $db_connection->query($sql);
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                if (mysqli_num_rows($result_of_query) == 1) {
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                    $isAvailable = false;
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                } else {
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                    $isAvailable = true;
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                }
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            } else {
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                $isAvailable = false;
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            }
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            break;
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    }
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    if (isset($isAvailable)) {