What potential issues can arise when trying to display specific variables that are automatically generated in a database entry?

When trying to display specific variables that are automatically generated in a database entry, the potential issue that can arise is that the variables may not be properly formatted or sanitized for display, leading to security vulnerabilities such as SQL injection or cross-site scripting attacks. To solve this issue, it is important to properly escape and sanitize the variables before displaying them on the webpage using functions like htmlspecialchars() or mysqli_real_escape_string().

// Assuming $dbConnection is your database connection object
$query = "SELECT * FROM table_name WHERE id = 1";
$result = mysqli_query($dbConnection, $query);

if(mysqli_num_rows($result) > 0){
    $row = mysqli_fetch_assoc($result);
    
    // Sanitize and escape the variables before displaying them
    $variable1 = htmlspecialchars($row['variable1']);
    $variable2 = htmlspecialchars($row['variable2']);
    
    echo "Variable 1: " . $variable1 . "<br>";
    echo "Variable 2: " . $variable2;
}