PHP get URL redirect location

get_redirect_location.php

<?php
function get_redirect_url($url) {
    stream_context_set_default(array(
        'http' => array(
            #'method' => 'HEAD',
            'request_fulluri' => true,
            'proxy' => 'tcp://127.0.0.1:1080'
        )
    ));

    $headers = @get_headers($url, true);
    if ($headers && isset($headers['Location'])) {
        return $headers['Location'];
    } else {
        return false;
    }
}

/*    curl_setopt($ch, CURLOPT_HEADER, 1);
      curl_setopt($ch, CURLOPT_NOBODY, 1);
      curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
      curl_setopt($ch, CURLOPT_PROXY, '127.0.0.1:1080');*/
function get_redirect_target($url)
{
    $ch = curl_init($url);
    $options = array(
        CURLOPT_HEADER => true,
        CURLOPT_NOBODY => true,
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_PROXY => '127.0.0.1:1080',
        CURLOPT_PROXYTYPE => CURLPROXY_SOCKS5,
        CURLOPT_USERAGENT => 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.80 Safari/537.36',
        CURLOPT_HTTPHEADER => array(
            'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
            'Accept-Language: en-US,en;q=0.8,zh-CN;q=0.6,zh;q=0.4'
        ),
    );
    curl_setopt_array($ch, $options);
    $i = 0;
    do {
        $headers = curl_exec($ch);
    } while (!$headers && $i++ < 3);
    curl_close($ch);

    if (preg_match('/^Location: (.+)$/im', $headers, $matches)) {
        return trim($matches[1]);
    } else {
        return false;
    }

}