Functions are very useful to perform the same task with different parameters. Similar to programming languages you can create your own custom function to perform a task and return a response in MySQL.
After function creation, it is called similar to inbuilt functions.
In this tutorial, I show how you can create a function in MySQL and use it.
Dynamic-dependent dropdowns are very helpful to restrict user selection. You may have already seen this on the registration or profile page of the website where you need to select country, state, and city. Options in the dropdown update every time when a country or state dropdown selection gets changed.
If your tables are properly interlinked in the database and want to list their data on the dropdown then you can make them dynamically dependent on one another and load their data using AJAX.
In this tutorial, I show how you can auto populate dropdown using jQuery AJAX with MySQL database data in CakePHP 4.
Asynchronous file upload gives the user a more seamless experience by allowing them to upload files without having to reload the page.
Handle the file on the client side using jQuery and JavaScript, send the file to the server using an AJAX request, and then process the file on the server.
If the file is not validated then you can immediately display the error messages.
In this tutorial, I show how you can upload file using jQuery AJAX with validation and display a preview of it after uploading it in CakePHP 4.
AJAX (Asynchronous JavaScript and XML) is an important part when building a dynamic web application. You can send requests to a server and update parts of a web page without reloading the whole page.
In CakePHP 4 CSRF protection is already enabled, you can use this to securely send AJAX requests.
In this tutorial, I show how you can send AJAX request using jQuery with and without a CSRF token in CakePHP 4 project.
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