What are some common challenges when searching through HTML source code using PHP?

One common challenge when searching through HTML source code using PHP is correctly parsing and navigating the HTML structure to find specific elements or content. Using a library like SimpleHTMLDOM can simplify this process by providing easy-to-use functions for traversing the DOM tree. 

// Example using SimpleHTMLDOM to search for a specific element in HTML source code
include('simple_html_dom.php');

$html = file_get_html('http://example.com');
$element = $html->find('div[class=example]', 0);

if($element){
    echo $element->plaintext;
} else {
    echo 'Element not found';
}

Keywords

HTML parsing DOMDocument XPath regular expressions HTML entities.

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