PHP Tutorials

When working with large datasets, auto-populating dropdown lists is a common requirement in web development.

With the help of jQuery AJAX, it’s possible to dynamically fill dropdown lists with data from a server in response to user input.

A common use case of this feature is when selecting a country, state, and city. According to the country selection related state list populates, followed by a list of cities within the selected state.

It enables users to quickly choose their location from a list of options and can enhance the user experience by requiring less manual input.

In this tutorial, I show how you can use jQuery AJAX and PHP to autopopulate dropdown with MySQL database data.

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A Login page is one of the basic requirements when creating a registration based website where the user can register to the website and sign in to its account to manage.

In this case, you can use AJAX to create a user-friendly login page.

With AJAX you can directly check the entered username and password are correct or not in MySQL database without reloading the whole page.

If the user is registered then redirect the user to a home page otherwise display an error.

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Uploading the files to a server is a common task in web development.

In PHP you can easily upload any type of file on the server using the move_uploaded_file() method. But it requires a form to be submitted for uploading the selected file.

You can make this process smoother with jQuery AJAX, it also improves user experience. You can directly display the image or file preview after it is been uploaded or alert an error if file is not validated without reloading the page.

For this FormData object is use to pass the selected file to the server using AJAX.

In this tutorial, you’ll learn step-by-step how to use PHP jQuery, and AJAX to upload files with validation and display its preview.

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