How can PHP developers ensure the validity of hyperlinks in their code?

PHP developers can ensure the validity of hyperlinks in their code by using the PHP built-in function `filter_var()` with the `FILTER_VALIDATE_URL` filter. This function will check if a given URL is valid according to RFC standards. By validating hyperlinks using this function, developers can prevent potential security vulnerabilities and ensure the correct functionality of their web applications. 

$link = "https://www.example.com";

if (filter_var($link, FILTER_VALIDATE_URL)) {
    echo "Valid URL";
} else {
    echo "Invalid URL";
}

Keywords

link validation PHP regular expressions error handling HTML parsing

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