Optimize the PHP code

[jaddy]

Hi,

I have some questions about optimizing PHP code:

1- Do I have always to close MySQL connection using the function mysql_close() ?

2- Do I have always to close an open file using the function fclose() ?

3- If I don't need to use one variable in a session any more,
do I have to un-register it using the function session_unregister() ?

4- When should I use the function session_destroy() in my code? Do really I have to use it?

Thx.

[Weedpacket]

1. No.

2. No.

3. No.

4. When you no longer want the session to be valid.

1 and 2 aren't necessary because PHP will clean up all such open handles at script's end (it can be a good idea though, because every such resource requires cooperation from the system and whatever is at the other end); 3 isn't necessary either - if you don't want to use the variable, then don't register it (but you'd be better off using $_SESSION['varname'] instead of session_register('varname') and $varname anyway - that would be more efficient); 4 - use it when you no longer want the session data to be valid (PHP will clean it up eventually anyway).

[jaddy]

Thanks Weedpacket.

I think it is a good habit to close and end all those opened handles.