What potential security risks should be considered when updating MySQL fields with PHP?

When updating MySQL fields with PHP, one potential security risk to consider is SQL injection. To prevent this, it is important to sanitize user input before using it in SQL queries. This can be done by using prepared statements or escaping input using functions like mysqli_real_escape_string(). 

// Assuming $conn is the MySQL database connection
$user_input = $_POST['user_input'];
$escaped_input = mysqli_real_escape_string($conn, $user_input);

$sql = "UPDATE table_name SET field_name = '$escaped_input' WHERE condition";
mysqli_query($conn, $sql);

Keywords

SQL injection prepared statements input validation cross-site scripting data sanitization

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