You free-up the dataspace pointed-to by $string with unset().  PHP knows
that this variable points-to character data or numeric or whatever.  unset()
then releases the dataspace held by the $string itself and erases its name
from the symbol table.

Using mysql_free_result($string) will not work because $string does not
point-to a result returned from a mysql_query().  After executing
mysql_free_result($result), $result still exists in the symbol table.  You
would have to unset($result) to delete the pointer itself.

-----Original Message-----
From: Bas Jobsen [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, September 05, 2001 4:46 PM
To: [EMAIL PROTECTED]
Subject: Re: [PHP-DB] MYSQL/PHP what is the difference between unset()
and mysql_free_result() ?


Hello,

> unset() simply deletes the pointer to the data without releasing the space
> held by the data.
> mysql_free_result() releases the data storage pointed-to by the $result
> pointer.
> This is important because $result could be pointing-to a dataspace
> containing a large number or rows returned by the mysql_query().  You WANT
> to recover this dataspace.

Well, oke, tnx. But if unset() doesn't releas the data-space, what then is
it's functionality?
only voor tests like: if(isset($var)) ;?

And how can i free the data-space from a string or somting like that?
b.e.
$string="a very long string";
free($string);#?????????
#could i use mysql_free_result($string);

Tnx,

Bas


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