Hello, I have experience in creating AMP pages including AMP forms. AMP allows only AJAX based forms when form is submitted using POST method.
For sending email I can use PHPMailer or SwiftMailer, both of which are PHP based.
About me
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I'm a Software Developer. I have experience in programming in PHP, Python, and JavaScript. I also have experience in modern web technologies including building and converting regular HTML pages to AMP pages.