Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
Is it OK to rely on PHP’s behaviour if a key is not in the array? Which is:
Attempting to access an array key which has not been defined is the same as accessing any other undefined variable: an E_NOTICE-level error message will be issued, and the result will be NULL.
For instance if I do not know $_POST contains certain keys is it OK to just try? I want the result to be null anyway. Or is there a better way?
Since you should always develop with error reporting turned on, you want to avoid triggering avoidable errors so as to keep error reporting useful to you. As such, no, it’s not okay. Use
issetorempty. For a more in-depth excursion into this topic see The Definitive Guide To PHP’s isset And empty.