What are some best practices for efficiently reading and processing webpage source code in PHP?

When reading and processing webpage source code in PHP, it is important to efficiently extract the relevant information without unnecessary overhead. One best practice is to use PHP's built-in functions like file_get_contents() to retrieve the webpage source code, and then use regular expressions or DOM parsing libraries like SimpleHTMLDom to extract the desired data. 

// Example of reading and processing webpage source code efficiently in PHP

// Get the webpage source code
$url = 'https://www.example.com';
$html = file_get_contents($url);

// Use regular expressions to extract specific data
if (preg_match('/<title>(.*?)<\/title>/', $html, $matches)) {
    $title = $matches[1];
    echo "Title: $title";
}

// Or use DOM parsing libraries like SimpleHTMLDom
require 'simple_html_dom.php';
$html = str_get_html($html);
$links = $html->find('a');
foreach ($links as $link) {
    echo $link->href . "<br>";
}

Keywords

DOMDocument file_get_contents SimpleXMLElement XPath regular expressions

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