Скачать или смотреть How to Delete Rows from a Database using jQuery, AJAX, and PHP

Learn the best practices for deleting rows from a database with a simple approach using jQuery, AJAX, and PHP.
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This video is based on the question https://stackoverflow.com/q/65474514/ asked by the user 'thothlike' ( https://stackoverflow.com/u/13229454/ ) and on the answer https://stackoverflow.com/a/65476245/ provided by the user 'Sikander Nawaz' ( https://stackoverflow.com/u/12152386/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Deleting Rows from a Database with jQuery, AJAX, and PHP

Managing databases is a fundamental task in web development, and deleting entries is often required. In this guide, we will explore how to effectively delete a row from a database using jQuery, AJAX, and PHP.

The Problem

A common scenario encountered while trying to delete a database entry involves several technologies working seamlessly together. You might write an AJAX call using jQuery to send a delete request to a PHP script. However, what happens when you click the delete button, but nothing happens on the page or in your database?

This was the case for a user who shared their experience of attempting to delete an entry in the database but faced unexpected issues. They clicked the delete button, but despite proper implementation, there was no change in the database or the user interface.

Common Issues

Some frequent pitfalls include:

Incorrect directory paths for your PHP script.

Issues in jQuery selectors or AJAX configuration.

Missing unique identifiers for elements in the DOM which will be modified post-ajax call.

The Solution

Let's break down and understand how to make the delete functionality work seamlessly.

Step 1: HTML Setup

Start with a simple button structure in your HTML. Here’s an example of how to set up a delete button embedded within your interface:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: jQuery AJAX Request

Once your button is set up, create a jQuery AJAX function to handle the delete request. The key is to correctly bind the click event and make the AJAX call to your PHP script.

Here’s how you can achieve it:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: PHP Script for Deletion

In your PHP script (delete.php), you will handle the incoming request and execute the SQL delete command. Here’s a basic structure for the PHP code:

[[See Video to Reveal this Text or Code Snippet]]

Step 4: Debugging Tips

If you find that the deletion is still not working, here are some debugging tips:

Utilize console.log in your JavaScript code to log the ID that is being sent to the server.

Check the "Network" tab in your browser's developer tools to see if the AJAX call is successfully sending data and what response it receives.

Make sure that the PHP file has the correct permissions and is located in the expected directory.

Conclusion

Having operations such as delete implemented correctly in your web application can enhance the user experience significantly. When your delete functionality works seamlessly, users can manage their data effectively. Remember to pay attention to details, as problems often arise from minor oversights. Happy coding!