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.
I know it’s possible to set custom PHP variables using the $_ prefix, however I am unsure if it is safe to do this? I wouldn’t be setting many, nor would I be overwriting pre-set variables like $_SERVER or $_COOKIE. Should I just avoid doing it at all?
It is completely safe to initialize variables that start with
$_as long as you don’t override any of the superglobals (that you need).However, the
$_prefix on variables indicates that they are superglobals or have some other kind of magic behavior, so to do so on “normal” variables would be nonstandard.