How can the risk of exposing sensitive information or creating security vulnerabilities be mitigated when echoing variables from one PHP file to another in WordPress?

To mitigate the risk of exposing sensitive information or creating security vulnerabilities when echoing variables from one PHP file to another in WordPress, it is important to properly sanitize and validate the data before displaying it. This can be done using WordPress functions such as `sanitize_text_field()` or `esc_html()` to ensure that the data is safe to output.

// Example of properly sanitizing and echoing a variable in WordPress
$my_variable = get_option('my_option');
$sanitized_variable = sanitize_text_field($my_variable);
echo esc_html($sanitized_variable);