PHP ShoutBox allows developers to add a instant message shout box to websites. The shoutbox is an iframe element, and the script operates using javascript and stores the messages in a MySQL database. The look of the box is controlled through styles. All the modern browsers are supported. PHP ShoutBox handles some of the details that other shout boxes do not. When the new message is displayed, the shoutbox is scrolled down so that the new message comes into view. PHP ShoutBox also checks for new messages.