Are you concerned about the profile picture size? at the time of implementing login with facebook in PHP. We’ll show you the simple way to get large size profile picture in Facebook PHP SDK.

Email input field validation is mandatory before submitting the HTML form. Email validation helps to check if a user submitted a valid email address or not. Using regular expression in JavaScript, you can easily validate the email address before submitting the form.

To track the user online status, you need to maintain a flag in the database. You should need to update this flag when user will log out by the Logout link. If the user closes the browser without clicking the logout button, the browser close event detection would require for updating the flag in the database.

PayPal IPN is a notification service that used to notifies merchants about the PayPal transaction. Many times you encounter the problems that PayPal IPN (Notify URL) is not working for sandbox account. To solving this problem you needs to edit Instant Payment Notification setting in your sandbox account.

Generally, PayPal is not automatically redirected to the seller’s website after the payment. The buyer needs to click on a link to redirect back to the website. If you want to redirect the buyer automatically and attach the transaction information after payment on PayPal, some configurations are required on the PayPal business account.

In many cases you need to enable cURL in PHP. Here we’ll provide the easy way to enable cURL in PHP. You only need to modify the php.ini file for enabling cURL in PHP

Many times you need to validate the text field for special characters and HTML tags in jQuery validation. JavaScript test() function allow you to check special character.

Learn how you can display the categories in the post details page in WordPress. Use the get_the_category() function to get the categories data (name, slug, url, etc) of the current post.

An Easy way to add days to the current date or desired date using PHP. Add 5 days to date using the date() function in PHP.