How can PHP developers ensure that their code is compliant with RFC standards when extracting and displaying website update information?

To ensure that PHP code is compliant with RFC standards when extracting and displaying website update information, developers can use built-in PHP functions like `filter_var` with the `FILTER_VALIDATE_URL` filter to validate URLs and ensure they adhere to RFC standards. 

$url = 'https://example.com/update';
if (filter_var($url, FILTER_VALIDATE_URL)) {
    echo 'Valid URL: ' . $url;
} else {
    echo 'Invalid URL';
}

Keywords

PHP RFC standards website update information compliance validation

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