When you are working with ajax, the problem is that after you have loaded some content using ajax, you can’t change the URL of the browser according to the content. Because of this, reloading the page causes the new ajax content to disappear and it shows the previous page. Although you can resolve this problem [...]
When you go to Facebook or Twitter, The first thing you notice is that the page is loaded and within seconds the status feeds will be displayed. That is because the page is loaded first and after that it sends an ajax request to another page and gets back the feeds in the JSON format [...]
Usually when we want to insert timestamps in a database. We will either put the column default as ‘Current Timestamp’ or insert the value ‘date(“Y-m-d H:i:s”)’ into that column. But both the methods will result in inserting only the server time in the database and visitors from all over the world will see the same server time in the website. [...]