The json_encode() function in PHP provides an easy way to pass an array to JavaScript. Using json_encode() function, you can pass multidimensional array to the JavaScript function and the PHP array can be accessed as a JavaScript object.

Sometimes needs to change the URL structure for SEO or other purposes. In that case, the old URL shows 404 error which is very confusing for the website’s visitor. To avoid this situation, you can redirect the old page (non-existing) request to new page URL by the .htaccess file.

Generally, we used radio buttons to let a user select ONE option from a limited number of choices. Most of the cases radio buttons are ideal to select a single option from a group of the options. If you want to allow the user to check only one checkbox from a group of the checkboxes, it can be done easily using jQuery.

Google Maps JavaScript API provides various option to customize the Google Map functionality as per your needs. The marker position change on Google Map is one of them. Using JavaScript you can easily change the position of the marker on Google map without page refresh. Use setPosition() to change the position of the marker on Google Map.

It is important to take security seriously when you collecting data from the users. Form data validation is required before submitting to the database. You can implement the client-side form validation easily with HTML5 without using jQuery. Use type and pattern attribute in HTML input field to validate a phone number.

Before submitting the value of the radio button group, it is required to check whether the user selects one radio button in each group. Because it’s always a good idea to validate the value in the client before sending data to the server side. Here we will show you how to check if one radio button in each group is checked using jQuery.

Using jQuery you can automatically convert text field value while typing. Not only the jQuery, here we will show you the three different way to transform text field data to uppercase while typing. You can convert text to uppercase using jQuery or JavaScript or CSS.

Use of undefined constant VIEWPATH issue occurs when you upgrade your existing CodeIgniter application version to CodeIgniter 3.x. The undefined constant viewpath issue can be easily solved by the following solution. Open the root’s index.php file and specify the view directory to solve this issue.

Generally, when we get the file size in JavaScript, it returns in bytes format. But if want, you can easily convert file size to human readable format using JavaScript. Use our custom formatFileSize() function to convert the size from bytes to KB, MB, GB, TB, PB, EB, ZB, YB using Javascript.