What are some potential pitfalls of extracting data from HTML source code using PHP?

One potential pitfall of extracting data from HTML source code using PHP is that the structure of the HTML may change, causing your extraction code to break. To mitigate this risk, you can use a library like Simple HTML DOM Parser, which provides a more robust and flexible way to extract data from HTML. 

// Include the Simple HTML DOM Parser library
include('simple_html_dom.php');

// Create a new instance of the parser
$html = new simple_html_dom();

// Load the HTML source code from a URL
$html->load_file('http://www.example.com');

// Find and extract data using CSS selectors
$data = $html->find('div#content h1', 0)->plaintext;

// Output the extracted data
echo $data;

// Clean up
$html->clear();

Keywords

DOMDocument XPath Regular Expressions HTML parsing Data extraction

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