I’ve compiled a list of sites that I referenced when using Amazon API with PHP.

If you search Google with the keywords “PHP Amazon API”, you should find many articles.

I think you can refer to various articles for usage examples, but I believe these sites are sufficient as the main references.

■ Reference articles

Amazon official reference (English)

・Documentation Archive : Amazon Web Services

Famous site in the Amazon API community

・Amazon Web サービス入門(Product Advertising API)

■ Summary articles

・AmazonのAPI（通称Amazon Product Advertising API）覚え書き - Csideのダイアリー

■ Systematic learning reference articles

・PHPでAmazon Web Servicesを利用する（1/5）：CodeZine

That’s all from the Gemba.