如何处理由类的“新”方法生成的PHP中的内存泄漏

Question

I have Created following class in flie index.class.php :-

<?php
class index{
        public function loadTitle() {
            $title = "Welcome to My Website";
            return $title;
        }
    }
?>

And now, I am using it like below in my index.php file

    <?php
        require_once("index.class.php");
        $obj = new index();
        echo $obj->loadTitle();
    ?>

My question because the Page will become heavy with lots of article and images, and I will expect 1500-2500 user every day in it.

Do I need to also unset memory, I know PHP has its own garbage collector, but following URL scares me out :- www.google.com/search?q=php+memory+leak+with+new

and I saw a few questions in StackOverflow saying it does consumes memory, and certain people have suggested to use the unset function, but I am not sure how to do it..

This is my attempt:

Do I need to only call

<?php
    unset($obj); // At the end of the page, or where i will no more be using this object.
?>

Or I have to set NULL value too.

<?php
    $obj = NULL;
    unset($obj);
?>

Is the above code fine for releasing memory, or do I need to do something else too? Please suggest and teach me!

Answer 1

Firstly, you don't need to unset your variables all the time. I've seen people unset ALL their variables at the end of their PhP script, which is useless.

The only time where you'd want to unset variables is if you've memory problems in PhP and you can destroy variables you won't use anywhere else in your script, but you still have a lot of things to do (considering time or memory).

You might also want to give a look at :

http://www.stackoverflow.com/questions/584960/whats-better-at-freeing-memory-with-php-unset-or-var-null