How to destroy a class object in PHP?
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How to destroy a class object in PHP?
I wrote a little class for storing global variables/functions. My question is - is it necessary to destroy the class object after the script has finished?
or will PHP destroy that object itself?
Here's my code:
$web=new c_web("myWeb");
$web->loadTemplate("/!framework/admin/template.htm");
$web->doStuff();
// script has finished - destroying required here?
In case I need to destroy it, how can I do that?
3 Answers
3
If the script finishes, the memory is released. You're ready as is :)
Well, the database connection might need a 'close', but in most situations you only need to worry about this when you need more memory DURING exection. So if you load X amount of data in an object, and then you want to do it again. But basically: don't worry, code happy :)
– Nanne
Apr 8 '11 at 11:46
No, you do not need to destroy any variable yourself (and an object is a variable) : as soon as your PHP script reaches its end, its variables will be freed, and the correspondig memory released.
Actually, a variable gets destroyed automatically when the end of its variable's scope is reached -- and, when you reach end of script, it's the end of the scope introduced by that script's execution.
(Answering a comment to another answer)
Of course, when your script is ended because of an error, the same thing happens : the variables are freed, and the memory released.
what about open database connections? do i need to close them at all?
– Fuxi
Apr 8 '11 at 11:37
Unless you're using persistent connections, connections are automatically terminated when the PHP script ends.
– Pascal MARTIN
Apr 8 '11 at 11:38
As @Nanne sayd, if the script finished the memory is released, however in some circumstances you might whant to unset($web); .
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great - thanks! and what about if a script will will be terminated by an error? will all variables (database ..) be destroyed aswell?
– Fuxi
Apr 8 '11 at 11:34