Here is the complete tutorial on how to use ajax to submit the HTML form without refreshing the page containing the form.
A Web App to check live weather conditions of a city. It uses Yahoo Weather API to get weather data, Geolocation API and Google Maps API to auto detect the location of the user when Auto Detect button is clicked. And has all the functionality of a Web App.
Major improvements of PHP7 in performance and memory consumptions made PHP7 a game changer. PHP is by far the most widely used backend programming language till date. There were many critical vulnerabilities in past but PHP7 has made those a thing of past.