Parse link dạng range

parseLinks.php

<?php
/**
 * Url có dạng http://example.com/listing?page={1-100,0}
 * trong đó 1-100 là loop page,
 *      0 là tuỳ chọn check die link trước khi add, mặc định là 0
 *
 * @param $url
 *
 * @return \Generator
 */
public static function parseLinks($url){
    if(preg_match( "/\{(\d+)\-(\d+)(\,[^\}\,])?\}/", $url, $matches)){
        $min = $matches[1];
        $max = $matches[2];
        $check_available = $matches[3] ?? false;
        $client = (bool)$check_available ? (new Client([
            'verify' => false,
            'headers' => [
                'User-Agent' => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.105 Safari/537.36'
            ]
        ])) : false;
        $url_template = preg_replace( "/\{(\d+)\-(\d)+(\,[^\}\,])?\}/", "__1__", $url );
        for ( ; $min < $max; $min ++ ) {
            $_url = str_replace( "__1__", $min, $url_template);
            if($client){
                try{
                    $client->head( $_url, [
                        'on_stats' => function (TransferStats $stats) use (&$_url) {
                            $_url = $stats->getEffectiveUri();
                        }
                    ] );
                    yield $_url->__toString();
                }catch (\Exception $ex){
                    continue;
                }
            }else{
                yield $_url;
            }
        }
    }else{
        yield $url;
    }
}

https://123doc.net/document/{418400-418420,1}-bang-cong-thuc-tich-phan-dao-ham-mu-logarit.htm

anh ơi cái đoạn này

 $client->head($_url, [
                            'on_stats' => function (TransferStats $stats) use (&$_url) {
                                $_url = $stats->getEffectiveUri();
                            }
                        ]);

sao có thể check ra các link sống như kia nhỉ ?