A solution for the error 'The security header is not valid' in OpenCart when using PayPal Express Checkout.
Here is a solution to your problem if you are building an application in Flex 3 that uses the VideoDisplay component and the results fail to work in Internet Explorer and Chrome but mysteriously work in Firefox.
PHP 5.4 introduced traits. Traits are in many ways like code-assisted copy and paste. They are ways to mix code into a class without inheritance. But what are they good for? When should they be used?