Class Question(s)

[neg9]

Ok say I have a MySQL class. I also have an admin class. I need the admin class to be able to use functions in the MySQL class. I looked at extend (class admin extend MySQL) but it hasn’t really clicked in my head yet if you know what I mean. Anybody have any suggestions?

Also, someone once told me that when classes were included in a script, they got put in memory for an amount of time. This way, if someone else hits the webpage right after you do, the class is already loaded into memory, thus saving some overhead. I told him he was full of it.... lol, was there any truth to what he was saying?

Thanks for all your help over the years. This forum has been a lifesaver on many occasions.

-Scott

[Weedpacket]

Have a $database var. When the admin class is initialised, set $database to be a new MySQL class object. Then the functions in the admin class can use

$this->database->MySQLConnect();

(or whatever your API is).

Then there's the parent keyword, that may help. It depends on what your class hierarchy looks like (is an Admin a kind of MySQL? Or does it just use one?)

[neg9]

I rewrote my admin class and it did not work.

Heres a little more information:

class 1 - a mysql class
class 2 - just some class

I need to use class 1 as it is, by itself. I have some scripts that use the functions in it. So therefore its contents can not change.

I have another class (class 2) that uses a database, so the easiest way to do that would be to use the functions in class 1.

I tested it and everything works okay until this happens... in class 1 (database) vars stored ($this->somevar) in the class do not work. lets give an example:

$CLASS = new testclass;

class testclass
{

var $testclass2;

function testclass()
   {
   $this->sql = new testclass2;
   }

function testfunction($test)
   {
   $this->testclass2->echo($test);
   }
}

class testclass2
{

var $test;

function echo($test)
   {
   $this->test = $test;
   $this->print();
   }

function print()
   {
   echo $this->test;
   }
}

If i were to run this command $CLASS->testfunction("helloworld"); it would not work. I beleve its because in testclass2 its not remembering what $this->test contains. Perhaps im talking in circles or something. I dont know, but i am stumped.

-Scott

[Weedpacket]

I think it might just be because "echo" and "print" are reserved words (at least, that's what the error message I get says). I couldn't say for sure, because all those "test"s started making my eyes cross ...

[ahundiak]

Your sample does work if you replace echo with echox and print with printx for the method names. And use $this->testclass2 = new testclass2 in the constructor.

Your original problem is still confusing. Assume you have a global variable $db = new Db();

Then you can use it inside of a method as long as you use the global keyword

class xxx
{
function yyy()
{
global $db;
$db->query(whatever);

No need to do anything special.