Re: simple OO question

Ahh damn - minor omission - add a '( )' after myclass constructor name :-) AndrewH ----- Original Message ----- From: "Andrew Halliday" <andrew@recalldesign.com> To: "John LYC" <john@edlabs.com> Cc: <php-general@lists.php.net> Sent: Monday, March 05, 2001 2:47 PM Subject: Re: [PHP] simple OO question > No, you cant do this as you coded it, however minor alterations will allow > this. > Last time i checked, you couldnt initialise variables in object scope ... > you can only declare them. This makes sense, because thats what the > constructor is for. > > Altered code for what you want to do is as follows: > > > > > class myclass{ > var $fields; > var $columns; > > function myclass { // constructor > $this->fields = mysql_list_fields("database1", "table1", $link); > $this->columns = mysql_num_fields($fields); > } > > // all code must be declared in a function !! - This isnt Java Script :) > function doSomething() { > for ($i = 0; $i < $this->columns; $i++) { > var mysql_field_name($this->fields, $i); > } > }//function doSomething() > }//class > > > $myobj = new myclass(); // creates object and runs constructor (see above) > $myobj->doSomething(); // do whatever you want the object to do > > > > Andrew H > > > > > > class myclass{ > > > > $fields = mysql_list_fields("database1", "table1", $link); > > $columns = mysql_num_fields($fields); > > > > for ($i = 0; $i < $columns; $i++) { > > var mysql_field_name($fields, $i); > > } > > > > }//class > > > > now.. can i do this? > > is there a performnance issue here? > > can i put this in the constructor? > > > > john > > > > > > > > > > Andrew Halliday wrote: > > > > > yes you can do all of this > > > > > > but in no OO language so far have i seen the ability to access a > variable > > > inside a method...you would have to do this: > > > > > > class myclass > > > { > > > var $myvar; > > > function setmyvar($newmyvar) > > > { > > > $this->myvar = $newmyvar; > > > } > > > } > > > > > > Then you could do this: > > > > > > $myclassObj = new myclass(); > > > $myclassObj->setmyvar(10); > > > echo $myclassObj->myvar; > > > > > > This would print '10'... > > > > > > Cut and paste that exact program in and it should be a working > demonstration > > > ... > > > > > > You should read the php manual more ... > > > see > > > www.php.net > > > > > > AndrewH > > > ----- Original Message ----- > > > From: "John LYC" <john@edlabs.com> > > > To: "PHP List" <php-general@lists.php.net> > > > Sent: Monday, March 05, 2001 1:36 PM > > > Subject: [PHP] simple OO question > > > > > > > can i do this..? > > > > > > > > //declaring class > > > > > > > > class myclass{ > > > > > > > > //declaring properties > > > > ... > > > > .... > > > > > > > > //declaring methods.. > > > > function mymethod(){ > > > > > > > > //can i declared variable in method? > > > > var $myvar; > > > > ... > > > > //do something > > > > > > > > }//end of mymethod > > > > > > > > /////////////////// > > > > > > > > if yes, do i access myvar like this. > > > > $item = new myclass; > > > > print $item->mymethod()->myvar; > > > > > > > > > > > > thanks > > > > john > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > PHP General Mailing List (http://www.php.net/) > > > > To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net > > > > For additional commands, e-mail: php-general-help@lists.php.net > > > > To contact the list administrators, e-mail: > php-list-admin@lists.php.net > > > > > > > > > > -- > > > PHP General Mailing List (http://www.php.net/) > > > To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net > > > For additional commands, e-mail: php-general-help@lists.php.net > > > To contact the list administrators, e-mail: php-list-admin@lists.php.net > > > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net > For additional commands, e-mail: php-general-help@lists.php.net > To contact the list administrators, e-mail: php-list-admin@lists.php.net >