php怎么自动将url生成链接并提取title

<?php
//文件编码为UTF-8(无BOM)
error_reporting(E_ALL || E_STRICT);
$url = &#39;http://q我q.com&#39;;
//首先判断用户输入的URL是否合法
if (!filter_var($url, FILTER_VALIDATE_URL)) {
    die(&#39;你输入的不是一个正常的URL.&#39;);
}
$ch = curl_init();
curl_setopt_array($ch, array(
    CURLOPT_HEADER => false,
    CURLOPT_URL => $url,
    //考虑到有些网站是301跳转的.
    CURLOPT_FOLLOWLOCATION => true,
    //连接的超时时间设置为5秒
    CURLOPT_CONNECTTIMEOUT => 5,
    //响应超时时间为5秒
    CURLOPT_TIMEOUT => 5,
    CURLOPT_VERBOSE => false,
    CURLOPT_AUTOREFERER => true,
    //接收所有的编码
    CURLOPT_ENCODING => &#39;&#39;,
    //返回页面内容
    CURLOPT_RETURNTRANSFER => true,
));
$response = curl_exec($ch);
//检测网页的编码,把非UTF-8编码的页面,统一转换为UTF-8处理.
if (&#39;UTF-8&#39; !== ($encoding = mb_detect_encoding($response, array(&#39;UTF-8&#39;, &#39;CP936&#39;, &#39;ASCII&#39;)))) {
    $response = mb_convert_encoding($response, &#39;UTF-8&#39;, $encoding);
}
//匹配一下title
$title = &#39;没有成功获取到标题&#39;;
if (preg_match(&#39;#<title>(.*)</title>#isU&#39;, $response, $match)) {
    $title = $match[1];
}
echo $title;