php script getting error, this should download links of a webpage

fellow developers!

I’m currently working on a PHP project where I need to:

Extract all the URLs (especially links to downloadable files) from a webpage. ex: https://samplefile.download/sample-mp3-files/ Display these URLs so that I can choose which files to download. Finally, programmatically download only the selected files.

<?php
function get_webpage_content($url) {
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
    $content = curl_request($ch);  curl_exec($ch)
    curl_close($ch);
    return $content;
}

function extract_urls($content) {
    $pattern = '/<a\s+(?:[^>]*?\s+)?href=["\']([^"\']*)["\']/i';
    preg_match_all($pattern, $content, $matches);
    return $matches[1];
}

function download_files($urls, $save_directory) {
    foreach ($urls as $url) {
        $file_name = basename(parse_url($url, PHP_URL_PATH));
        $file_path = $save_directory . DIRECTORY_SEPARATOR . $file_name;

        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        $file_data = curl_exec($ch);
        curl_close($ch);

        if ($file_data) {
            file_put_contents($file_path, $file_data);
            echo "Downloaded: $file_name\n";
        } else {
            echo "Failed to download: $url\n";
        }
    }
}

$url="https://samplefile.download/sample-mp3-files/"; 
$save_directory = 'downloads';

if (!is_dir($save_directory)) {
    mkdir($save_directory, 0777, true);
}

$webpage_content = get_webpage_content($url); 

$urls = extract_urls($webpage_content);

download_files($urls, $save_directory);
?>

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