Category: AJAX

The images which are wouldn’t successfully load on the web page will show nothing when the source does not exist.

It looks bad when there are many images and some of them are missing.

For solving this you need to look through all the pages and find the broken images and fix them manually time to time. It is the time-consuming process.

In this tutorial, I will show you with two examples, to automatically detect the broken images and replace with another image.

  • In the first one, I am using the jQuery, and
  • In the second, using AJAX with jQuery

How to check Broken Image with jQuery and AJAX

 

AJAX JQuery

There are many cases when require to update certain part of the web page on the regular basis.

For example – showing live cricket or football score, display latest news feeds,etc.

There are two ways to send AJAX request on specified time –

  • By setInterval() and
  • By setTimeout() JavaScript functions.

Both do the same work but they are reliable for certain cases, which I discuss in this tutorial.

How to fire AJAX Request on Regular Interval

AJAX How To JQuery PHP

With sorting the list it is easier for the user to locate items in a sorted list than unsorted. It rearranges the data in specific order (ascending or descending).

You can either use PHP or AJAX to get the sorted data.

I am using AJAX to sort the list in this tutorial.

In this tutorial, I am displaying the employee’s list and attach click event on the table column header. Whenever header gets clicked then send an AJAX request with column name to sort with.

Sorting the Table by clicking Header with AJAX

AJAX JQuery PHP

A tooltip is a small pop-up element which shows information when moving the mouse pointer to the element.

You can dynamically update the tooltip content with AJAX if you don’t want to fix the content while creation.

You can add the tooltip to the element with Bootstrap, jQueryUI, or any other library.

I am using the jQuery UI library in the tutorial.

In the demonstration, I am displaying the list of users and dynamically load information on the tooltip with AJAX on mouse hover.

Dynamically show data in the Tooltip using AJAX

AJAX JQuery PHP

By adding file upload to the project, there may case arrives where you have to check image width and height before upload if you only allowed image files for uploading.

This is very common in Job Application Forms where the user has only can upload its profile photo of given dimensions other it’s not uploaded.

In this tutorial, I explain you with an example of how to implement it. For uploading, I am using AJAX and PHP and done restriction with JavaScript.

How to Validate Image width And Height Before Upload Using JavaScript

AJAX Javascript JQuery PHP

An Array is used to store multiple values in a single variable.

This can be used to pass the group of related values as data to the $.ajax for processing and get the response.

E.g. pass all checked checkboxes values, selected values from the list.

In this tutorial, I show how you can pass JavaScript Array to an AJAX request with an example.

How to Send JavaScript Array to the AJAX using jQuery and PHP

AJAX JQuery PHP

JSON stands for JavaScript Object Notation, it is a data interchange format which is also been used to passing data from the server.

It is the best and effective way when need to return multiple values as a response from the PHP script to the jQuery.

You couldn’t directly return an array from AJAX, it must have converted in the valid format.

In this case, you can either use XML or JSON format.

In the tutorial demonstration, I will return an array of users from AJAX, while return converts the array into JSON format using the json_encode() function in the PHP.

On the basis of response show data in tabular format.

Return JSON response from AJAX using jQuery and PHP

AJAX DataBase JQuery PHP