RE: [PHP] default and another constructor
> -Original Message- > From: Rudy Metzger [mailto:[EMAIL PROTECTED] > Sent: 12 May 2004 14:27 > > On Wed, 2004-05-12 at 15:18, Mark Constable wrote: > > > > function forum($naam=NULL,$tijd=NULL,$tekst=NULL) > > > > and test the incoming variables with isset() before > > attempting to use > > any of them. > If you assign default values to the method arguments, you > cannot test them with isset() anymore, as they will be set. Not if the default is NULL -- isset(NULL) is false. Cheers! Mike - Mike Ford, Electronic Information Services Adviser, Learning Support Services, Learning & Information Services, JG125, James Graham Building, Leeds Metropolitan University, Beckett Park, LEEDS, LS6 3QS, United Kingdom Email: [EMAIL PROTECTED] Tel: +44 113 283 2600 extn 4730 Fax: +44 113 283 3211 -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] default and another constructor
> No, you cannot do this kind of method overloading, not like this anyway. > If you are using PHP5 you can kind of emulate overloading by using the > __call() function... some googling will find examples. > > You can at least make the below work by removing the first forum() > instance and using > > function forum($naam=NULL,$tijd=NULL,$tekst=NULL) Another option, if you wish to have varying argument lists, is to define the methods with no arguments at all, and use the func_get_args(), func_num_args(), and func_get_arg() functions described here: http://php.net/manual/en/ref.funchand.php - michal migurski- contact info and pgp key: sf/cahttp://mike.teczno.com/contact.html -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] default and another constructor
On Wed, 12 May 2004 11:27 pm, Rudy Metzger wrote: > On Wed, 2004-05-12 at 15:18, Mark Constable wrote: > > You can at least make the below work by removing the first > > forum() instance and using > > > > function forum($naam=NULL,$tijd=NULL,$tekst=NULL) > > > > and test the incoming variables with isset() before attempting > > to use any of them. > > If you assign default values to the method arguments, you cannot test > them with isset() anymore, as they will be set. # cat null_test.php # php null_test.php 'hi' NULL NULL --markc -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] default and another constructor
Thanks Mark for helping me out...
The way you describe it with "function
forum($naam=NULL,$tijd=NULL,$tekst=NULL)" is a good trick !!
Kind Regards.
"Mark Constable" <[EMAIL PROTECTED]> schreef in bericht
news:[EMAIL PROTECTED]
> On Wed, 12 May 2004 10:43 pm, Lieve Vissenaeken wrote:
> > Please ,could anybody help me ? I'm not so familiar with PHP.
> >
> > I've the following problem with my code when I try to make an object
from
> > the class "forum" with the code "$test=new forum()". I always get a
> > warning on this: "Warning: Missing argument 1 for forum() in
> > /lvdata/www/tennis/php/sql.inc"
> > Is it not possible to just make a default constructor and an other
> > constructor like in JAVA ?
> > Thanks for helping
>
> No, you cannot do this kind of method overloading, not like
> this anyway. If you are using PHP5 you can kind of emulate
> overloading by using the __call() function... some googling
> will find examples.
>
> You can at least make the below work by removing the first
> forum() instance and using
>
> function forum($naam=NULL,$tijd=NULL,$tekst=NULL)
>
> and test the incoming variables with isset() before attempting
> to use any of them.
>
> > class forum
> > {
> > var $naam;
> > var $tijd;
> > var $tekst;
> >
> > function forum()
> > {
> > }
> >
> > function forum($naam,$tijd,$tekst)
> > {
> > $this->naam=$naam;
> > $this->tijd=$tijd;
> > $this->tekst=$tekst;
> > }
> > }
> >
> >
> > $test=new forum();
>
> --markc
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Re: [PHP] default and another constructor
On Wed, 2004-05-12 at 15:18, Mark Constable wrote:
> On Wed, 12 May 2004 10:43 pm, Lieve Vissenaeken wrote:
> > Please ,could anybody help me ? I'm not so familiar with PHP.
> >
> > I've the following problem with my code when I try to make an object from
> > the class "forum" with the code "$test=new forum()". I always get a
> > warning on this: "Warning: Missing argument 1 for forum() in
> > /lvdata/www/tennis/php/sql.inc"
> > Is it not possible to just make a default constructor and an other
> > constructor like in JAVA ?
> > Thanks for helping
>
> No, you cannot do this kind of method overloading, not like
> this anyway. If you are using PHP5 you can kind of emulate
> overloading by using the __call() function... some googling
> will find examples.
>
> You can at least make the below work by removing the first
> forum() instance and using
>
> function forum($naam=NULL,$tijd=NULL,$tekst=NULL)
>
> and test the incoming variables with isset() before attempting
> to use any of them.
If you assign default values to the method arguments, you cannot test
them with isset() anymore, as they will be set.
>
> > class forum
> > {
> > var $naam;
> > var $tijd;
> > var $tekst;
> >
> > function forum()
> > {
> > }
> >
> > function forum($naam,$tijd,$tekst)
> > {
> > $this->naam=$naam;
> > $this->tijd=$tijd;
> > $this->tekst=$tekst;
> > }
> > }
> >
> >
> > $test=new forum();
>
> --markc
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Re: [PHP] default and another constructor
Strange that you get this error. Normally you should get a "Fatal error:
Cannot redeclare forum::forum() "
PHP does not support 'function overloading', at least not in a way java
is doing it. One of the drawbacks of a free typed langauge (in contrary
to a strictly typed one).
cheerio
/rudy
On Wed, 2004-05-12 at 14:43, Lieve Vissenaeken wrote:
> Please ,could anybody help me ? I'm not so familiar with PHP.
>
> I've the following problem with my code when I try to make an object from
> the class "forum" with the code "$test=new forum()". I always get a warning
> on this: "Warning: Missing argument 1 for forum() in
> /lvdata/www/tennis/php/sql.inc"
> Is it not possible to just make a default constructor and an other
> constructor like in JAVA ?
> Thanks for helping
>
>
> class forum
> {
> var $naam;
> var $tijd;
> var $tekst;
>
> function forum()
> {
> }
>
>
> function forum($naam,$tijd,$tekst)
> {
> $this->naam=$naam;
> $this->tijd=$tijd;
> $this->tekst=$tekst;
> }
> }
>
>
> $test=new forum();
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Re: [PHP] default and another constructor
On Wed, 12 May 2004 10:43 pm, Lieve Vissenaeken wrote:
> Please ,could anybody help me ? I'm not so familiar with PHP.
>
> I've the following problem with my code when I try to make an object from
> the class "forum" with the code "$test=new forum()". I always get a
> warning on this: "Warning: Missing argument 1 for forum() in
> /lvdata/www/tennis/php/sql.inc"
> Is it not possible to just make a default constructor and an other
> constructor like in JAVA ?
> Thanks for helping
No, you cannot do this kind of method overloading, not like
this anyway. If you are using PHP5 you can kind of emulate
overloading by using the __call() function... some googling
will find examples.
You can at least make the below work by removing the first
forum() instance and using
function forum($naam=NULL,$tijd=NULL,$tekst=NULL)
and test the incoming variables with isset() before attempting
to use any of them.
> class forum
> {
> var $naam;
> var $tijd;
> var $tekst;
>
> function forum()
> {
> }
>
> function forum($naam,$tijd,$tekst)
> {
> $this->naam=$naam;
> $this->tijd=$tijd;
> $this->tekst=$tekst;
> }
> }
>
>
> $test=new forum();
--markc
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[PHP] default and another constructor
Please ,could anybody help me ? I'm not so familiar with PHP.
I've the following problem with my code when I try to make an object from
the class "forum" with the code "$test=new forum()". I always get a warning
on this: "Warning: Missing argument 1 for forum() in
/lvdata/www/tennis/php/sql.inc"
Is it not possible to just make a default constructor and an other
constructor like in JAVA ?
Thanks for helping
class forum
{
var $naam;
var $tijd;
var $tekst;
function forum()
{
}
function forum($naam,$tijd,$tekst)
{
$this->naam=$naam;
$this->tijd=$tijd;
$this->tekst=$tekst;
}
}
$test=new forum();
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