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File uploading is a basic requirement in a website. It is done using a server-side script. Requires reloading the page after form submission to execute the script.
With AJAX client-side script is interact with the server-side script and performs the action without page reload.
In this tutorial, I show how you can upload file using JavaScript AJAX and PHP.
AJAX is a web development technique that facilitates the exchange of data between the website visible on a user’s browser and its server-side database. This enables seamless communication for optimal performance and user experience.
JavaScript libraries or frameworks are commonly utilized by people to conveniently transmit AJAX requests. Although it’s essential to recognize the significance of transmitting AJAX requests with plain JavaScript as well.
To communicate with the server, use an object called XMLHttpRequest. It helps in sending and receiving data between the client-side and server-side.
In this tutorial, I show how you can send GET and POST AJAX requests with JavaScript and handle the request with PHP.
Cross-Site Request Forgery (CSRF) is a way to trick the server that a request sent to it is legitimate while it actually is an unauthorized attempt.
In CodeIgniter, CSRF protection is not enabled by default.
If it is been enabled then CodeIgniter generates a hash for each active user and this is used to verify the request.
Require to send the hash with the AJAX request otherwise, it gives an error – “The action you have requested is not allowed.”.
In this tutorial, I show how you can enable CSRF protection and regenerate hash for the next AJAX request and pass hash in AJAX request in the CodeIgniter project.
If you already managing the relationship between parent and child items using a separate field then it is easier to create a hierarchical structure.
With the use of a jsTree plugin, this will be created in less time.
jsTree is a jQuery plugin that creates a hierarchical data structure using JSON data.
It allows setting icon of a node, by default open, disable a node and set it selected while initializing, etc.
In this tutorial, I show how you can make a tree structure of MySQL data using jsTree plugin and PHP.
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