I have a question regarding the PHP $_SESSION variable keys and the reserved characters that can be used in them. I've been using PHP sessions in my web development project, and I want to make sure I have a clear understanding of what characters are allowed and what should be avoided when creating session variable keys.
From what I have gathered so far, the $_SESSION variable in PHP allows you to store information across multiple pages for a specific user session. The keys you use to access and set values in this superglobal array are essentially strings that identify the stored data.
However, I'm not sure if there are any reserved characters that I need to be careful of when naming my session variable keys. Can I use any symbol, number, or special characters in these keys, or are there specific characters that are not allowed or could potentially cause issues?
I want to ensure that I follow the best practices and avoid any conflicts or errors that might occur if I use reserved characters in my session variable keys. So, if anyone could shed some light on this topic and provide some guidance, I would greatly appreciate it.
Thank you in advance!