Enabling multi-factor authentication (MFA) is one of the single most effective steps you can take to protect your online accounts against unauthorised access. Combining something you have (a device or smartcard) or something you are (biometrics) with something you know (your password) ensures that if your password falls into the hands of an attacker, whether through a security breach, malware, or brute force guessing, then they still won't be able to get access to your account.
AWS X-Ray is an application monitoring tool by Amazon Web Services that allows you to get an insight into how your applications are performing in production. It also allows you to see how your applications interact with each other, with external services, and with some of AWS' own services. All that's required is to add some instrumentation code at key points in your application. Despite lack of official support, it can be used with PHP.
Opcache is one of PHP's most powerful tools when it comes to performance. With the release of PHP 7 it received a new feature which has gone largely un-noticed: the file cache. Depending on your hosting environment and/or traffic levels the file cache may be able to help squeeze even more performance out of PHP.
PHP apps can easily begin to slow down over time as they grow, and with the recent patches for the Meltdown vulnerability adding a performance penalty to many workloads this slowdown can be amplified. Often there are some simple changes that can be made in order to see a measurable performance improvement for production workloads.
Chrome, along with Edge, Opera and Safari, has built in support for detecting and preventing Cross Site Scripting (XSS) attacks. This works well as a safety net to protect users when websites fail to protect themselves from such attacks, but can cause issues with applications which allow users to post HTML in forms. This shows in chrome as an error page with the text "ERR_BLOCKED_BY_XSS_AUDITOR" and can be quite intimidating for users trying to perform a legitimate operation.
