簡単！たった１０行のコードでHTML取得＆解析をするPHPスクリプト

gistfile1.php

<?php
$url = 'http://www.yahoo.co.jp';
$user_agent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0)";

$opts = array(
    'http' => array(
        'method' => 'GET',
        'user_agent' => $user_agent,
    ));
$context = stream_context_create($opts);
$result = file_get_contents($url, false, $context);
$xml = simplexml_import_dom(DOMDocument::loadHTML($result));
$items = $xml->xpath("//*[@id='topicsfb']//li");
//print_r($items);
foreach($items as $item) {
    echo $item->a, PHP_EOL;
}