Script to be used with PHP's built-in webserver to proxy and spider a site on click

spider.php

<?php

// start PHP with: php -S localhost:8888 -t . spider.php

$site = 'http://www.targetwebsite.org/';

$path = $_SERVER["REQUEST_URI"];

if ($path == '/') {
    $path = '/index.html';
}

if (file_exists(__DIR__ . $path)) {
    return false;
}

$content = file_get_contents($site . $path);

if (strpos(ltrim($path, '/'), '/')) {
    if (!file_exists(__DIR__ . dirname($path))) {
        mkdir(__DIR__ . dirname($path), 0777, true);        
    }
}

file_put_contents(__DIR__ . rawurldecode($path), $content);

sleep(1);
return false;