This is actually a better programming style anyway, not only from a security point of view. You should adapt this style in your own interest. On your development system never do that on a production site , it's recommended that you switch on error reporting to be made aware of issues with uninitialised variables. Those are historic issues that can't be fixed easily but are not a security hazard.
Just make sure not to repeat these design issues in your own code As this is the case, you can secure your code further by using typesafe comparisons:. Asked 12 years, 2 months ago. Active 8 years, 6 months ago. Viewed 10k times. Improve this question. Add a comment. Active Oldest Votes. Improve this answer. But I would recommend you to browse the source of some open-source CMS's.
Note: I'm a php developer myself. Trying to read undefined variables is nasty. OIS - PHP scripts are often developed by people with very limited training, who are not necessarily aware of the full impact of their decisions. This is probably what the answerer meant.
It's not a constant, it's a php. By the way, when writing "PHP code is usually [very] low quality" , I think you should replace the word "usually" with "often". INI Recent practice has been to disable it by default. Enable it at your own risk! It only takes a minute to sign up.
Connect and share knowledge within a single location that is structured and easy to search. I know we should not do that, and we have it off now, but some of our very old code needs it. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Asked 12 years, 2 months ago. Active 12 years, 2 months ago.
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