Google detected a significant increase in the number of URLs that return a 404 (Page Not Found) error. Investigating these errors and fixing them where appropriate ensures that Google can successfully crawl your site's pages.
And Let me know why google gives such Errors while crawl that website. I would like to keep in the notice that as I have rewrite the rules for the .php pages
Where I am doing wrong with the internal links between pages and content? As I have updated and correct the links after getting this message from webmaster staff team.
Kindly Check and investigate for the internal links and confirm me if I have missed something again?
Kindly Advice.
I will appreciate.
just find broken links and fix them
you can then mark these 404 pages as Fixed in Webmaster Tools