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<?php
namespace YouTube\Utils;
class Utils
{
/**
* Extract youtube video_id from any piece of text
* @param $str
* @return string
*/
public static function extractVideoId($str)
{
if (strlen($str) === 11) {
return $str;
}
if (preg_match('/(?:\/|%3D|v=|vi=)([a-z0-9_-]{11})(?:[%#?&]|$)/ui', $str, $matches)) {
return $matches[1];
}
return false;
}
/**
* Will parse either channel ID or username from custom URL.
* Will not parse legacy usernames as those cannot be queried via YouTube API
* https://support.google.com/youtube/answer/6180214?hl=en
* @param $url
* @return mixed|null
*/
public static function extractChannel($url)
{
if (strpos($url, 'UC') === 0 && strlen($url) == 24) {
return $url;
}
if (preg_match('/channel\/(UC[\w-]{22})/', $url, $matches)) {
return $matches[1];
}
if (preg_match('/\/c\/(\w+)/i', $url, $matches)) {
return $matches[1];
}
return null;
}
public static function arrayGet($array, $key, $default = null)
{
foreach (explode('.', $key) as $segment) {
if (is_array($array) && array_key_exists($segment, $array)) {
$array = $array[$segment];
} else {
$array = $default;
break;
}
}
return $array;
}
public static function arrayFilterReset($array, $callback)
{
return array_values(array_filter($array, $callback));
}
/**
* @param $string
* @return mixed
*/
public static function parseQueryString($string)
{
$result = null;
parse_str($string, $result);
return $result;
}
public static function relativeToAbsoluteUrl($url, $domain)
{
$scheme = parse_url($url, PHP_URL_SCHEME);
$scheme = $scheme ? $scheme : 'http';
// relative protocol?
if (strpos($url, '//') === 0) {
return $scheme . '://' . substr($url, 2);
} elseif (strpos($url, '/') === 0) {
// relative path?
return $domain . $url;
}
return $url;
}
public static function getInputValueByName($html, $name)
{
if (preg_match("/name=(['\"]){$name}\\1[^>]+value=(['\"])(.*?)\\2/is", $html, $matches)) {
return $matches[3];
}
return null;
}
}