How can PHP be used to implement a feature that displays website content when a link is posted in a post-box, similar to Facebook?

To implement a feature that displays website content when a link is posted in a post-box, similar to Facebook, you can use PHP to extract the URL from the post, fetch the content of the URL using cURL or file_get_contents, and then display the relevant information such as the title, description, and image. 

<?php
function getWebsiteContent($url) {
    $html = file_get_contents($url);
    
    $doc = new DOMDocument();
    libxml_use_internal_errors(true);
    $doc->loadHTML($html);
    
    $title = $doc->getElementsByTagName('title')->item(0)->nodeValue;
    
    $metas = $doc->getElementsByTagName('meta');
    $description = '';
    $image = '';
    
    foreach ($metas as $meta) {
        if ($meta->getAttribute('property') == 'og:description') {
            $description = $meta->getAttribute('content');
        }
        if ($meta->getAttribute('property') == 'og:image') {
            $image = $meta->getAttribute('content');
        }
    }
    
    return array(
        'title' => $title,
        'description' => $description,
        'image' => $image
    );
}

$url = "https://example.com";
$websiteContent = getWebsiteContent($url);

echo "Title: " . $websiteContent['title'] . "<br>";
echo "Description: " . $websiteContent['description'] . "<br>";
echo "Image: <img src='" . $websiteContent['image'] . "'><br>";
?>

Keywords

PHP website content link preview Facebook-like post-box

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