How can PHP be used to check for changes on a website and automatically refresh it?

To check for changes on a website and automatically refresh it using PHP, you can create a script that periodically fetches the website content, compares it with the previous version, and triggers a refresh if changes are detected. This can be achieved by using PHP's cURL library to fetch the website content and comparing it with the previous version stored in a file or database. 

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

// File to store the previous version of the website content
$prevContentFile = 'prev_content.txt';

// Fetch the current website content
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$currentContent = curl_exec($ch);
curl_close($ch);

// Get the previous website content
$prevContent = file_get_contents($prevContentFile);

// Compare the current and previous content
if ($currentContent !== $prevContent) {
    // Content has changed, trigger a refresh
    echo '<meta http-equiv="refresh" content="0">';
}

// Save the current content for future comparison
file_put_contents($prevContentFile, $currentContent);
?>

Keywords

PHP website check for changes refresh automation

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