laravel 5.4 using goutte scrape large pages

I need scrape data from outdated web system. the page like below:

I can fetch the data well on single page test, but when I use it in loop encountered nginx 504 timeout however. Pseudocode like:

scrapePage($pageNum) {//fetch data from each page}
for($currentPage = 1; $currentPage < $totalPages; $currentPage++){scrapePage($currentPage)}

I think the best way is let it like ‘asynchronous’，when scraped one page success, output something and goto next page. How to do that?

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