How does qr// precompiled regex interact with Unicode and encodings?

Understanding how qr// precompiled regex interacts with Unicode and encodings in Perl is crucial for effective string manipulation and pattern matching in modern applications.

Perl, qr//, precompiled regex, Unicode, encodings, string manipulation, pattern matching


        <?php
        // Define a UTF-8 string
        $str = "Hello, 世界"; // "Hello, World" in Chinese

        // Precompile a regex pattern
        $pattern = qr/\p{Han}+/u;

        // Check if the string matches the pattern
        if ($str =~ $pattern) {
            echo "Match found: " . $&;
        } else {
            echo "No match found.";
        }
        ?>