How can one efficiently search for and extract specific data from an external website in PHP?

To efficiently search for and extract specific data from an external website in PHP, you can use the cURL library to make HTTP requests to the website, then use regular expressions or a HTML parser like DOMDocument to extract the desired data from the HTML response. 

<?php
// URL of the external website
$url = 'https://www.example.com';

// Initialize cURL session
$ch = curl_init($url);

// Set cURL options
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

// Execute cURL session
$response = curl_exec($ch);

// Close cURL session
curl_close($ch);

// Extract specific data using regular expressions
preg_match('/<title>(.*?)<\/title>/', $response, $matches);
$title = $matches[1];

// Output the extracted data
echo $title;
?>

Keywords

web scraping data extraction PHP DOM parsing cURL

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