[PHP] OOP variables

[Jarratt Ingram]

Hello, 

I was wondering if somebody would mind explaining this to me, is there a
big difference or requirement to pre defining variables your going to
use in a class eg: 

class name {
$var1 = '';
$var2 = '';

function blah(){
$var2
}
   }//-- End class  

Or is this also right 

class name {

function name(){

  $this-var1 = ''; 
  $this-var2 = '';
}   
function blah(){

}
}//-- End class


Thanks 
Jarratt

-- 
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php

Re: [PHP] OOP variables

[Richard Harb]

http://www.php.net/manual/en/language.oop.php states:

[quote]
In PHP 4, only constant initializers for var variables are allowed. To
initialize variables with non-constant values, you need an
initialization function which is called automatically when an object
is being constructed from the class. Such a function is called a
constructor (see below).
[/quote]

Richard

PS: Isn't it cool when every explanation is already written down in a
manual?


Thursday, April 15, 2004, 10:27:00 AM, you wrote:

 Hello, 

 I was wondering if somebody would mind explaining this to me, is there a
 big difference or requirement to pre defining variables your going to
 use in a class eg: 

 class name {
   $var1 = '';
   $var2 = '';

   function blah(){
   $var2
   }
}//-- End class  

 Or is this also right 

 class name {

   function name(){

  $this-var1 = '';
  $this-var2 = '';
   }   
   function blah(){
   
   }
   }//-- End class


 Thanks 
 Jarratt

-- 
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php

Re: [PHP] OOP variables

[Chris Boget]

 [quote]
 In PHP 4, only constant initializers for var variables are allowed. To
 initialize variables with non-constant values, you need an
 initialization function which is called automatically when an object
 is being constructed from the class. Such a function is called a
 constructor (see below).
 [/quote]

Another thing to consider is whether your class needs to or could be
accessed statically.  If it can then whatever variables you might need
in executing the class methods can't be solely defined in the constructor.
When used statically, the class' constructor is (obviously) never run.

Chris

-- 
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php