What are some recommended tutorials or guides for mastering regular expressions and their applications in PHP, particularly for tasks like parsing and extracting data from HTML structures?

Regular expressions are powerful tools for pattern matching and data extraction in PHP. To master regular expressions for tasks like parsing and extracting data from HTML structures, it is recommended to start with online tutorials and guides that cover the basics of regular expressions in PHP, such as the official PHP documentation or websites like regex101.com. Additionally, practicing with real-world examples and experimenting with different patterns will help solidify your understanding and skills in using regular expressions effectively.

// Example PHP code snippet for parsing and extracting data from HTML using regular expressions

$html = '<div class="content">
            <h1>Title</h1>
            <p>This is a paragraph.</p>
        </div>';

// Regular expression pattern to extract the content within <h1> tags
$pattern = '/<h1>(.*?)<\/h1>/s';

// Perform the regular expression match
if (preg_match($pattern, $html, $matches)) {
    $title = $matches[1];
    echo "Title: " . $title;
} else {
    echo "No title found";
}