Validation code automatically validates PHP back-end Verification code detection _php instance when Ajax submits the form

Source: Internet
Author: User
This article through the source code show how to implement the form submission, the verification code first detect correctness, incorrect then do not submit the form, update the verification code.

1. Front-end Code index.html

  Verification code submission Self-authentication 

2, back-end verification code detection checkcode.php


SOURCE Download Address: The AJAX implementation of the form when the verification Code automatic verification

The above is the whole content of this article, I hope that everyone's learning has helped, but also hope that we support the script home.

  • Related Article

    Contact Us

    The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

    If you find any instances of plagiarism from the community, please send an email to: and provide relevant evidence. A staff member will contact you within 5 working days.

    A Free Trial That Lets You Build Big!

    Start building with 50+ products and up to 12 months usage for Elastic Compute Service

    • Sales Support

      1 on 1 presale consultation

    • After-Sales Support

      24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.