php-general Digest 19 Dec 2009 05:08:01 -0000 Issue 6495
Topics (messages 300583 through 300589):
PHP to answer HEAD requests
300583 by: Dan Field
300584 by: Richard Quadling
Logic of conditionals and the ( ) operators
300585 by: Allen McCabe
300586 by: Ashley Sheridan
300588 by: Jonathan Tapicer
Re: Logic of conditionals and the ( ) operators (RESOLVED)
300587 by: Allen McCabe
Re: Class not functioning (RESOLVED)
300589 by: Allen McCabe
Administrivia:
To subscribe to the digest, e-mail:
[email protected]
To unsubscribe from the digest, e-mail:
[email protected]
To post to the list, e-mail:
[email protected]
----------------------------------------------------------------------
--- Begin Message ---
Is it possible to use PHP to answer HEAD http requests? Is it as
simple as doing something like:
header('blah')
exit;
I'd expect PHP to produce a full page rather than just a header though.
--
Dan Field <[email protected]> Ffôn/Tel. +44 1970 632 582
Peiriannydd Meddalwedd Senior Software Engineer
Llyfrgell Genedlaethol Cymru National Library of Wales
--- End Message ---
--- Begin Message ---
2009/12/18 Dan Field <[email protected]>:
> Is it possible to use PHP to answer HEAD http requests? Is it as simple as
> doing something like:
>
> header('blah')
> exit;
>
> I'd expect PHP to produce a full page rather than just a header though.
>
> --
> Dan Field <[email protected]> Ffôn/Tel. +44 1970 632 582
> Peiriannydd Meddalwedd Senior Software Engineer
> Llyfrgell Genedlaethol Cymru National Library of Wales
>
>
>
>
>
$_SERVER['REQUEST_METHOD'] will/should contain the request type.
Documented as ...
"Which request method was used to access the page; i.e. 'GET', 'HEAD',
'POST', 'PUT'.
Note: PHP script is terminated after sending headers (it means after
producing any output without output buffering) if the request method
was HEAD."
See http://docs.php.net/manual/en/reserved.variables.server.php
--
-----
Richard Quadling
"Standing on the shoulders of some very clever giants!"
EE : http://www.experts-exchange.com/M_248814.html
Zend Certified Engineer : http://zend.com/zce.php?c=ZEND002498&r=213474731
ZOPA : http://uk.zopa.com/member/RQuadling
--- End Message ---
--- Begin Message ---
In a nutshell:
Will this work?
if ($perm == (11 || 12))
Explanation:
I am laying the groundwork for a photo viewing system with a private and
public mode, and additionally if an admin is logged in, there is an
additional level of permission. I came up with a number system to make it
easier (and is calcualted by a class) so now, instead of checking against
the $mode variable, if the user is logged in, and then what their user level
is if they are logged in, I just check against some numbers (the class
evaluates all those conditions and assigns the appropriate number a single
permission variable, $perm.
--- End Message ---
--- Begin Message ---
On Fri, 2009-12-18 at 10:21 -0800, Allen McCabe wrote:
> In a nutshell:
>
> Will this work?
>
> if ($perm == (11 || 12))
>
>
> Explanation:
>
> I am laying the groundwork for a photo viewing system with a private and
> public mode, and additionally if an admin is logged in, there is an
> additional level of permission. I came up with a number system to make it
> easier (and is calcualted by a class) so now, instead of checking against
> the $mode variable, if the user is logged in, and then what their user level
> is if they are logged in, I just check against some numbers (the class
> evaluates all those conditions and assigns the appropriate number a single
> permission variable, $perm.
That equates to if($perm == true) as 11 in this case translates to true
(being a positive integer) The code never needs to figure out the ||
part, as the first part is true.
I think what you'd want to do is possibly:
if($perm == 11 || $perm == 12)
Thanks,
Ash
http://www.ashleysheridan.co.uk
--- End Message ---
--- Begin Message ---
Hi,
Yes, what Ashley said is correct. Also, if you want to avoid writing
$perm several times in the if, or if you have a lot of permissions you
can do:
if (in_array($perm, array(11, 22)))
And you can put in that array all the permissions you need to.
Regards,
Jonathan
On Fri, Dec 18, 2009 at 3:47 PM, Ashley Sheridan
<[email protected]> wrote:
> On Fri, 2009-12-18 at 10:21 -0800, Allen McCabe wrote:
>
>> In a nutshell:
>>
>> Will this work?
>>
>> if ($perm == (11 || 12))
>>
>>
>> Explanation:
>>
>> I am laying the groundwork for a photo viewing system with a private and
>> public mode, and additionally if an admin is logged in, there is an
>> additional level of permission. I came up with a number system to make it
>> easier (and is calcualted by a class) so now, instead of checking against
>> the $mode variable, if the user is logged in, and then what their user level
>> is if they are logged in, I just check against some numbers (the class
>> evaluates all those conditions and assigns the appropriate number a single
>> permission variable, $perm.
>
>
> That equates to if($perm == true) as 11 in this case translates to true
> (being a positive integer) The code never needs to figure out the ||
> part, as the first part is true.
>
> I think what you'd want to do is possibly:
>
> if($perm == 11 || $perm == 12)
>
> Thanks,
> Ash
> http://www.ashleysheridan.co.uk
>
>
>
--- End Message ---
--- Begin Message ---
Thank you Ashley, it makes perfect sense. I don't know why I didn't just set
up some tests like Shiplu suggested!
I've rewritten all my code BACK to the correct way. (I thought it looked
cooler, oh well).
On Fri, Dec 18, 2009 at 10:47 AM, Ashley Sheridan
<[email protected]>wrote:
> On Fri, 2009-12-18 at 10:21 -0800, Allen McCabe wrote:
>
> In a nutshell:
>
> Will this work?
>
> if ($perm == (11 || 12))
>
>
> Explanation:
>
> I am laying the groundwork for a photo viewing system with a private and
> public mode, and additionally if an admin is logged in, there is an
> additional level of permission. I came up with a number system to make it
> easier (and is calcualted by a class) so now, instead of checking against
> the $mode variable, if the user is logged in, and then what their user level
> is if they are logged in, I just check against some numbers (the class
> evaluates all those conditions and assigns the appropriate number a single
> permission variable, $perm.
>
>
> That equates to if($perm == true) as 11 in this case translates to true
> (being a positive integer) The code never needs to figure out the || part,
> as the first part is true.
>
> I think what you'd want to do is possibly:
>
> if($perm == 11 || $perm == 12)
>
> Thanks,
> Ash
> http://www.ashleysheridan.co.uk
>
>
>
--- End Message ---
--- Begin Message ---
I looked into registries (singleton registries), and while I can see the
advantage they provide, most every article I read advised AGAINST using
singleton registries because it creates extra dependencies (ie. a file needs
the database class AND the registry class instead of just the database
class). The disadvantage to me about this is having to keep everything
straight; my projects as of late have been expanding rapidly and I can
barely keep track of everything. As it stands, it takes me about 30 minutes
to get back into my projects each day.
Wouter; I ended up going with the static option and it works nicely :) I am
thrilled at how it just works! Coupled with some nicely styled DIV layers
and some onclick=this.style.display='none'; to make it go away I have a
fantastic user notification system.
On Wed, Dec 16, 2009 at 3:59 AM, Wouter van Vliet / Interpotential <
[email protected]> wrote:
> Allen,
>
> Before you go with my static-approach, please do consider Shawn's registry
> pattern suggestion. That's pretty sweet too ;-).
>
> A little response to your long text, before I help you fix the bug. A
> static property is basically the same as a regular property on an object.
> Only difference is that they are not reset when the class is instantiated
> into an object. They are just there.
>
> Now, about your bug. The syntax for referencing a static property is a bit
> weird - which has to do with the existence of class constants, which might
> have set you off.
>
> Notifier::notifyQueue would reference a class constant. The [] syntax is
> not valid here, since a constant is - you got it: constant. And thus cannot
> be changed.
> Notifier::$notifyQ[] = '<div> ... </div>'; references the static property.
>
> But... since notifyQ is a proptected static property, it is very unlikealy
> that you'll ever actually write Notifier::$notifyQ. You add to this queue
> from within the class itself, so therefore self::$notifyQ is a lot better.
>
> Does that answer your question?
>
> Btw; Shawn; Assuming that your Registry class holds objects, there is no
> need have the ampersand in front of the get method or $object argument.
> Objects are *always* references. And you might want to look at the __get,
> __set and __isset magic.
>
> Wouter
>
>
> 2009/12/16 Allen McCabe <[email protected]>
>
> Wouter,
>>
>> Implementing your static idea was pretty easy, I was already referencing
>> Notifier with the :: operator in my other methods, however I am running into
>> trouble assigning new values to the static array.
>>
>> I am getting a "syntax error, unexpected '[' " on this line of my Notifier
>> class:
>>
>> Notifier::notifyQ[] = '<div class="'.$message;
>>
>> . . .
>>
>> Any ideas why this is causing an error?
>> (note: I did try using $this->Notifier, and it said I cannot do what-not
>> to a non-object, can't remember the exact message at the moment)
>>
>> On Tue, Dec 15, 2009 at 2:30 PM, Wouter van Vliet / Interpotential <
>> [email protected]> wrote:
>>
>>> Allen,
>>>
>>> The short answer (but don't follow this):
>>> <?php
>>> class Meetgreet {
>>> public function deleteSingle($id, $number) {
>>> // do something
>>> global $Notify;
>>> $Notify->addToQ( .. );
>>> }
>>> }
>>> ?>
>>>
>>> The long(er) answer:
>>> I assume your Notifier object functions as singleton? Ie; accross your
>>> entire application, there is only one instance of that class?
>>>
>>> Why not go-static? That is, to my experience, the sweetest way to make
>>> something globally accessible - without making something global. Like so
>>>
>>> <?php
>>> class Notifier {
>>>
>>> protected static $queue = Array();
>>>
>>> // make sure it can't be instantiated
>>> private constructer __construct() {
>>> }
>>>
>>> public static function addToQ( $arg, $anotherArg) {
>>> self::$queue[] = $arg.' - '.$anotherArg;
>>> }
>>>
>>> }
>>>
>>> // and then from within any method anywhere, call
>>> Notifier::addToQ('foo', 'bar');
>>>
>>> ?>
>>>
>>> Does that work for you?
>>>
>>> Regards,
>>> Wouter
>>>
>>> (ps. call me a purist, but a function defined in a class is no longer
>>> called a function, but a *method*)
>>>
>>> 2009/12/15 Allen McCabe <[email protected]>
>>>
>>>> Hey all (and Nirmalya, thanks for the help!),
>>>>
>>>>
>>>> I have a question that I just can't seem to find via Google.
>>>>
>>>> I want to be able to add messages to a qeue whenever my classes complete
>>>> (or
>>>> fail to complete) specific functions. I think have a call within my html
>>>> to
>>>> my Notifier class to print all qeued messages (via a function 'printQ').
>>>>
>>>> How do I access a globally instantiated class from within another class?
>>>>
>>>> Example:
>>>>
>>>> <?php
>>>>
>>>> // INSTANTIATE
>>>> $Meetgreet = new Meetgreet;
>>>> $Notify = new Notifier;
>>>>
>>>> ...
>>>> ...
>>>>
>>>> $Meetgreet->deleteSingle($id, 1); // This completes a function within
>>>> Meetgreet class. That function needs to be able to use the Notifier
>>>> function
>>>> addtoQ(), how would this be accomplished?
>>>>
>>>> ?>
>>>> ...
>>>> ...
>>>>
>>>> <?php $Notify->printQ() ?>
>>>>
>>>> On Mon, Dec 14, 2009 at 6:07 PM, Nirmalya Lahiri
>>>> <[email protected]>wrote:
>>>>
>>>> > --- On Tue, 12/15/09, Allen McCabe <[email protected]> wrote:
>>>> >
>>>> > > From: Allen McCabe <[email protected]>
>>>> > > Subject: [PHP] Class not functioning
>>>> > > To: "phpList" <[email protected]>
>>>> > > Date: Tuesday, December 15, 2009, 6:17 AM
>>>> > > Hey everyone, I just delved into
>>>> > > classes recently and have been having
>>>> > > moderate success so far.
>>>> > >
>>>> > > I have a puzzler though.
>>>> > >
>>>> > > I have the following class decalred and instantiated:
>>>> > >
>>>> > > class Notify {
>>>> > > var $q = array();
>>>> > >
>>>> > > public function addtoQ($string, $class)
>>>> > > {
>>>> > > $message = '<span class="'. $class .'">'.
>>>> > > $string .'</span>';
>>>> > > $this->q[] = $message;
>>>> > > }
>>>> > >
>>>> > > public function printQ()
>>>> > > {
>>>> > > if (isset($q))
>>>> > > {
>>>> > > echo '<p align="center"
>>>> > > class="notification">';
>>>> > > foreach($this->q as $msg)
>>>> > > {
>>>> > > echo $msg ."\n";
>>>> > > }
>>>> > > echo '</p>';
>>>> > > }
>>>> > >
>>>> > > return;
>>>> > > }
>>>> > >
>>>> > > function __destruct()
>>>> > > {
>>>> > > if (isset($q))
>>>> > > {
>>>> > > unset($this->q);
>>>> > > }
>>>> > > }
>>>> > > } // END CLASS Notify
>>>> > >
>>>> > >
>>>> > > And in my script, I call it like so:
>>>> > > $Notif = new Notify;
>>>> > >
>>>> > > I have run other statements in other classes that should be
>>>> > > adding to the $q
>>>> > > array (ie. Notify::addtoQ('ERROR! There Was An Error
>>>> > > Updating The
>>>> > > Database!', 'error');)
>>>> > >
>>>> > > However, when I try to get my webpage to display them
>>>> > > using:
>>>> > >
>>>> > > $Notify->printQ();
>>>> > >
>>>> > > it does not seem to want to loop through this array (and
>>>> > > print the
>>>> > > messages). I am getting NO error message, in fact
>>>> > > everything 'looks' fine,
>>>> > > I'm just not seeing the appropriate message.
>>>> > >
>>>> > > Any help would be appreicated!
>>>> > >
>>>> >
>>>> > Allen,
>>>> > You have made a small typing mistake in function printQ() where you
>>>> would
>>>> > like to checked the array for its existence. By mistake you have wrote
>>>> "if
>>>> > (isset($q))". But your array variable is not an freely accessible
>>>> array,the
>>>> > array is embedded into an object. So, you have to write the like "if
>>>> > (isset($this->q))".
>>>> >
>>>> > Another point, you can't add a message into the array by calling the
>>>> > member function addtoQ() using scope resolution operator "::". If you
>>>> really
>>>> > want to add message into the array, you have to call the member
>>>> function
>>>> > from within the object. (ie. $Notif->addtoQ('ERROR! There Was An Error
>>>> > Updating The Database!', 'error');).
>>>> >
>>>> > ---
>>>> > নির্মাল্য লাহিড়ী [Nirmalya Lahiri]
>>>> > +৯১-৯৪৩৩১১৩৫৩৬ [+91-9433113536]
>>>> >
>>>> >
>>>> >
>>>> >
>>>> >
>>>>
>>>
>>>
>>>
>>> --
>>> http://www.interpotential.com
>>> http://www.ilikealot.com
>>>
>>> Phone: +4520371433
>>>
>>
>>
>
>
> --
> http://www.interpotential.com
> http://www.ilikealot.com
>
> Phone: +4520371433
>
--- End Message ---
