Re: [PHP] $_GET and multiple spaces.

[Jochem Maas]

Andrés Robinet schreef:

-Original Message-



...



$name = 'mylist[myindex]';

this is almost an invite to moan about how http_build_query() was
'fixed'
in 5.1.3 to escape square brackets ... which makes php nolonger do one
of
the coolest, imho, with regard to incoming GET/POST values - namely
auto-convert
bracketed request var names into native arrays. at least if those
strings
are used in anything other than a URL context (form inputs anyone).
I would have been nice to have the encoding as an optional
switch/argument.


Well, almost... the other part of the world that arguably wanted square
brackets escaped in http_build_query will be very pleased (let me tell you I
don't use http_build_query, but have my own as sometimes PHP 5 is not an
option...).
I guess they thought http_build_query would always be used in an URL
context. But yes... escaping square brackets could be made optional and we
get the best of both worlds.

Anyway... my point was that names may need escaping, at least in some
contexts. But let me ask you because maybe I'm wrong:

Click

Wouldn't this be translating into $_GET['list']['index'] == 'value'? As far
as I've tested, it is... Also, it seems that "[" and "]" are unsafe
characters according to http://www.ietf.org/rfc/rfc1738.txt



...


Maybe that's why they chose to escape square brackets. I'm not a standards
freak, but rather a pragmatic man. Just trying to prove a point.


you are completely correct, and I agree. I am also pragmatic - it was pragmatism
that got me using http_build_query in a non-url context ... I have a
ORM-like tool with a generic frontend that creates very complex POST/GET
values/strings that describe what I like to call a 'data path' .. which allows
you to specify stuff like 'the list [or details] of all subitems belonging to 
the
3 selected subitems of the item with keyfield values ,Y and Z'. this is done
using a structure which is a nested array that translates accross requests
nicely using http_build_query() - but it means the resulting request parameters
names are used in a GET context and in POST context which means using the 
parameter
names in the context of INPUT tag names, and in such cases the encoding is not
wanted - it maybe the that encoding is required by certain standards in such a 
context
BUT php doesn't recognise urlencoded square brackets in the way one wants ...
namely one doesn't get a neat nesed array in $_POST but rather stuff like:

$_POST["e[f][n]"] = "entityname"

(as opposed to:)

$_POST["e"["f"]["n"] = "entityname"

(which is what my ORM-like generic thingy was expecting.)

the function I showed isn't name 'inputPost*' for nothing :-) it was 
specifically
written for the task of making request parameter names as generated by 
http_build_query()
usable in the name attribute of input tags and have them behave as they would if
found in a GET query string.

the only reason I remember all this about http_build_query()  is because it:

a) totally broke my app/tool at a time when I didn't have control of the php 
version
and didn't have time to actually fix (well I had to make time :-)

b) it was quite a headache getting the regexp in question to do exactly what I 
wanted
(e.g. that only square brackets encountered in request variable names should be 
decoded
and those found in request variable values should be left encoded, etc, etc).

sometimes it's fun to reminisce :-P




 /* since php5.1.3 http_build_query() urlencodes square brackets -
this does not please us at all,
  * this function fixes the problem the encoding causes us when
using http_build_query() output
  * in hidden INPUT field names.
  */
 function inputPostQueryUnBorker($s)
 {
 // first version - slower? more code!
 /*
 return preg_replace('#(\?|&(?:amp;)?)([^=]*)=#eU',
 "'\\1'.str_replace(array('%5B','%5D'),
array('[',']'), '\\2').'='",
 $s);
 //*/

 // second version - faster? more compact! (should work
identically to the above statement.
 return preg_replace('#%5[bd](?=[^&]*=)#ei',
'urldecode("\\0")', $s);
 }




...

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RE: [PHP] $_GET and multiple spaces.

[Andrés Robinet]

> -Original Message-
> From: Jochem Maas [mailto:[EMAIL PROTECTED]
> Sent: Monday, January 14, 2008 8:34 PM
> To: Andrés Robinet
> Cc: php-general@lists.php.net
> Subject: Re: [PHP] $_GET and multiple spaces.
> 
> Andrés Robinet schreef:
> >> -Original Message-
> >> From: Richard Lynch [mailto:[EMAIL PROTECTED]
> >> Sent: Monday, January 14, 2008 7:08 PM
> >> To: Andrés Robinet
> >> Cc: php-general@lists.php.net
> >> Subject: RE: [PHP] $_GET and multiple spaces.
> >>
> >> On Mon, January 14, 2008 1:33 pm, Andrés Robinet wrote:
> >>>> -Original Message-
> >>>> From: Richard Lynch [mailto:[EMAIL PROTECTED]
> >>>> Sent: Monday, January 14, 2008 2:11 PM
> >>>> To: Jochem Maas
> >>>> Cc: clive; Churchill, Craig; php-general@lists.php.net
> >>>> Subject: Re: [PHP] $_GET and multiple spaces.
> >>>>
> >>>> On Mon, January 14, 2008 3:17 am, Jochem Maas wrote:
> >>>>> I think actually the whole url should be urlencoded as a matter
> of
> >>>>> course, not
> >>>>> 100% sure about this (and it's way to early on a monday to bother
> >>>>> checking up ;-) ...
> >>>>> maybe someone else can chime in?
> >>>> Actually, after you urlencode() the values, you should
> htmlentities
> >>>> the whole URL, as it is being passed to HTML as a value to be
> output
> >>>> to HTML.
> >>>>
> >>>> The whole URL should *NOT* be URL-encoded, however.
> >>>>
> >>>> --
> >>>> Some people have a "gift" link here.
> >>>> Know what I want?
> >>>> I want you to buy a CD from some indie artist.
> >>>> http://cdbaby.com/from/lynch
> >>>> Yeah, I get a buck. So?
> >>> Like this?
> >>>
> >>> $url =
> >>>
> >>
> htmlspecialchars('whatever.php?'.urlencode($name).'='.urlencode($value)
> >> );
> >>
> >> Yes, but if your $name is weird enough to need to be urlencoded, you
> >> probably are doing something "Wrong" from a stylistic programming
> >> stand-point...
> >>
> >> I'm not even sure of the rules for what can be in a $name, come to
> >> think of it...
> >>
> >
> > I think I can tell you what... it has just came to my mind (nirvana
> > moment)... how about this?
> >
> > $name = 'mylist[myindex]';
> 
> this is almost an invite to moan about how http_build_query() was
> 'fixed'
> in 5.1.3 to escape square brackets ... which makes php nolonger do one
> of
> the coolest, imho, with regard to incoming GET/POST values - namely
> auto-convert
> bracketed request var names into native arrays. at least if those
> strings
> are used in anything other than a URL context (form inputs anyone).
> I would have been nice to have the encoding as an optional
> switch/argument.

Well, almost... the other part of the world that arguably wanted square
brackets escaped in http_build_query will be very pleased (let me tell you I
don't use http_build_query, but have my own as sometimes PHP 5 is not an
option...).
I guess they thought http_build_query would always be used in an URL
context. But yes... escaping square brackets could be made optional and we
get the best of both worlds.

Anyway... my point was that names may need escaping, at least in some
contexts. But let me ask you because maybe I'm wrong:

Click

Wouldn't this be translating into $_GET['list']['index'] == 'value'? As far
as I've tested, it is... Also, it seems that "[" and "]" are unsafe
characters according to http://www.ietf.org/rfc/rfc1738.txt

"Unsafe:

   Characters can be unsafe for a number of reasons.  The space
   character is unsafe because significant spaces may disappear and
   insignificant spaces may be introduced when URLs are transcribed or
   typeset or subjected to the treatment of word-processing programs.
   The characters "<" and ">" are unsafe because they are used as the
   delimiters around URLs in free text; the quote mark (""") is used to
   delimit URLs in some systems.  The character "#" is unsafe and should
   always be encoded because it is used in World Wide Web and in other
   systems to delimit a URL from a fragment/anchor identifier that might
   follow it.  The character "%" is unsafe because it is used for
   encodings of other characters.  Other 

Re: [PHP] $_GET and multiple spaces.

[Jochem Maas]

Andrés Robinet schreef:

-Original Message-
From: Richard Lynch [mailto:[EMAIL PROTECTED]
Sent: Monday, January 14, 2008 7:08 PM
To: Andrés Robinet
Cc: php-general@lists.php.net
Subject: RE: [PHP] $_GET and multiple spaces.

On Mon, January 14, 2008 1:33 pm, Andrés Robinet wrote:

-Original Message-
From: Richard Lynch [mailto:[EMAIL PROTECTED]
Sent: Monday, January 14, 2008 2:11 PM
To: Jochem Maas
Cc: clive; Churchill, Craig; php-general@lists.php.net
Subject: Re: [PHP] $_GET and multiple spaces.

On Mon, January 14, 2008 3:17 am, Jochem Maas wrote:

I think actually the whole url should be urlencoded as a matter of
course, not
100% sure about this (and it's way to early on a monday to bother
checking up ;-) ...
maybe someone else can chime in?

Actually, after you urlencode() the values, you should htmlentities
the whole URL, as it is being passed to HTML as a value to be output
to HTML.

The whole URL should *NOT* be URL-encoded, however.

--
Some people have a "gift" link here.
Know what I want?
I want you to buy a CD from some indie artist.
http://cdbaby.com/from/lynch
Yeah, I get a buck. So?

Like this?

$url =


htmlspecialchars('whatever.php?'.urlencode($name).'='.urlencode($value)
);

Yes, but if your $name is weird enough to need to be urlencoded, you
probably are doing something "Wrong" from a stylistic programming
stand-point...

I'm not even sure of the rules for what can be in a $name, come to
think of it...



I think I can tell you what... it has just came to my mind (nirvana
moment)... how about this?

$name = 'mylist[myindex]';


this is almost an invite to moan about how http_build_query() was 'fixed'
in 5.1.3 to escape square brackets ... which makes php nolonger do one of
the coolest, imho, with regard to incoming GET/POST values - namely auto-convert
bracketed request var names into native arrays. at least if those strings
are used in anything other than a URL context (form inputs anyone).
I would have been nice to have the encoding as an optional switch/argument.

/* since php5.1.3 http_build_query() urlencodes square brackets - this does 
not please us at all,
 * this function fixes the problem the encoding causes us when using 
http_build_query() output
 * in hidden INPUT field names.
 */
function inputPostQueryUnBorker($s)
{
// first version - slower? more code!
/*
return preg_replace('#(\?|&(?:amp;)?)([^=]*)=#eU',
"'\\1'.str_replace(array('%5B','%5D'), array('[',']'), 
'\\2').'='",
$s);
//*/

// second version - faster? more compact! (should work identically to 
the above statement.
return preg_replace('#%5[bd](?=[^&]*=)#ei', 'urldecode("\\0")', $s);
}




--
Some people have a "gift" link here.
Know what I want?
I want you to buy a CD from some indie artist.
http://cdbaby.com/from/lynch
Yeah, I get a buck. So?


Regards,

Rob


Andrés Robinet | Lead Developer | BESTPLACE CORPORATION
5100 Bayview Drive 206, Royal Lauderdale Landings, Fort Lauderdale, FL 33308
| TEL 954-607-4207 | FAX 954-337-2695
Email: [EMAIL PROTECTED]  | MSN Chat: [EMAIL PROTECTED]  |  SKYPE:
bestplace |  Web: http://www.bestplace.biz | Web: http://www.seo-diy.com



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RE: [PHP] $_GET and multiple spaces.

[Andrés Robinet]

> -Original Message-
> From: Richard Lynch [mailto:[EMAIL PROTECTED]
> Sent: Monday, January 14, 2008 7:08 PM
> To: Andrés Robinet
> Cc: php-general@lists.php.net
> Subject: RE: [PHP] $_GET and multiple spaces.
> 
> On Mon, January 14, 2008 1:33 pm, Andrés Robinet wrote:
> >> -Original Message-
> >> From: Richard Lynch [mailto:[EMAIL PROTECTED]
> >> Sent: Monday, January 14, 2008 2:11 PM
> >> To: Jochem Maas
> >> Cc: clive; Churchill, Craig; php-general@lists.php.net
> >> Subject: Re: [PHP] $_GET and multiple spaces.
> >>
> >> On Mon, January 14, 2008 3:17 am, Jochem Maas wrote:
> >> > I think actually the whole url should be urlencoded as a matter of
> >> > course, not
> >> > 100% sure about this (and it's way to early on a monday to bother
> >> > checking up ;-) ...
> >> > maybe someone else can chime in?
> >>
> >> Actually, after you urlencode() the values, you should htmlentities
> >> the whole URL, as it is being passed to HTML as a value to be output
> >> to HTML.
> >>
> >> The whole URL should *NOT* be URL-encoded, however.
> >>
> >> --
> >> Some people have a "gift" link here.
> >> Know what I want?
> >> I want you to buy a CD from some indie artist.
> >> http://cdbaby.com/from/lynch
> >> Yeah, I get a buck. So?
> >
> > Like this?
> >
> > $url =
> >
> htmlspecialchars('whatever.php?'.urlencode($name).'='.urlencode($value)
> );
> 
> Yes, but if your $name is weird enough to need to be urlencoded, you
> probably are doing something "Wrong" from a stylistic programming
> stand-point...
> 
> I'm not even sure of the rules for what can be in a $name, come to
> think of it...
> 

I think I can tell you what... it has just came to my mind (nirvana
moment)... how about this?

$name = 'mylist[myindex]';

> --
> Some people have a "gift" link here.
> Know what I want?
> I want you to buy a CD from some indie artist.
> http://cdbaby.com/from/lynch
> Yeah, I get a buck. So?

Regards,

Rob


Andrés Robinet | Lead Developer | BESTPLACE CORPORATION
5100 Bayview Drive 206, Royal Lauderdale Landings, Fort Lauderdale, FL 33308
| TEL 954-607-4207 | FAX 954-337-2695
Email: [EMAIL PROTECTED]  | MSN Chat: [EMAIL PROTECTED]  |  SKYPE:
bestplace |  Web: http://www.bestplace.biz | Web: http://www.seo-diy.com

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RE: [PHP] $_GET and multiple spaces.

[Richard Lynch]

On Mon, January 14, 2008 1:33 pm, Andrés Robinet wrote:
>> -Original Message-
>> From: Richard Lynch [mailto:[EMAIL PROTECTED]
>> Sent: Monday, January 14, 2008 2:11 PM
>> To: Jochem Maas
>> Cc: clive; Churchill, Craig; php-general@lists.php.net
>> Subject: Re: [PHP] $_GET and multiple spaces.
>>
>> On Mon, January 14, 2008 3:17 am, Jochem Maas wrote:
>> > I think actually the whole url should be urlencoded as a matter of
>> > course, not
>> > 100% sure about this (and it's way to early on a monday to bother
>> > checking up ;-) ...
>> > maybe someone else can chime in?
>>
>> Actually, after you urlencode() the values, you should htmlentities
>> the whole URL, as it is being passed to HTML as a value to be output
>> to HTML.
>>
>> The whole URL should *NOT* be URL-encoded, however.
>>
>> --
>> Some people have a "gift" link here.
>> Know what I want?
>> I want you to buy a CD from some indie artist.
>> http://cdbaby.com/from/lynch
>> Yeah, I get a buck. So?
>
> Like this?
>
> $url =
> htmlspecialchars('whatever.php?'.urlencode($name).'='.urlencode($value));

Yes, but if your $name is weird enough to need to be urlencoded, you
probably are doing something "Wrong" from a stylistic programming
stand-point...

I'm not even sure of the rules for what can be in a $name, come to
think of it...

-- 
Some people have a "gift" link here.
Know what I want?
I want you to buy a CD from some indie artist.
http://cdbaby.com/from/lynch
Yeah, I get a buck. So?

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RE: [PHP] $_GET and multiple spaces.

[Churchill, Craig]

> -Original Message-
> From: Andrés Robinet [mailto:[EMAIL PROTECTED]
> Sent: Tuesday, 15 January 2008 6:33 AM
> To: php-general@lists.php.net
> Subject: RE: [PHP] $_GET and multiple spaces.


> Like this?
> 
> $url =
> htmlspecialchars('whatever.php?'.urlencode($name).'='.urlencode($value));
> 
> Regards,
> 
> Rob
> 

I'm now using urlencode on the values and htmlspecialchars on the entire url
and it's working nicely.

Thanks to everyone who helped.
Craig.
 

museumvictoria.com.au
This e-mail is solely for the named addressee and may be confidential.You 
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RE: [PHP] $_GET and multiple spaces.

[Andrés Robinet]

> -Original Message-
> From: Richard Lynch [mailto:[EMAIL PROTECTED]
> Sent: Monday, January 14, 2008 2:11 PM
> To: Jochem Maas
> Cc: clive; Churchill, Craig; php-general@lists.php.net
> Subject: Re: [PHP] $_GET and multiple spaces.
> 
> On Mon, January 14, 2008 3:17 am, Jochem Maas wrote:
> > I think actually the whole url should be urlencoded as a matter of
> > course, not
> > 100% sure about this (and it's way to early on a monday to bother
> > checking up ;-) ...
> > maybe someone else can chime in?
> 
> Actually, after you urlencode() the values, you should htmlentities
> the whole URL, as it is being passed to HTML as a value to be output
> to HTML.
> 
> The whole URL should *NOT* be URL-encoded, however.
> 
> --
> Some people have a "gift" link here.
> Know what I want?
> I want you to buy a CD from some indie artist.
> http://cdbaby.com/from/lynch
> Yeah, I get a buck. So?

Like this?

$url =
htmlspecialchars('whatever.php?'.urlencode($name).'='.urlencode($value));

Regards,

Rob

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Re: [PHP] $_GET and multiple spaces.

[Richard Lynch]

On Mon, January 14, 2008 3:17 am, Jochem Maas wrote:
> I think actually the whole url should be urlencoded as a matter of
> course, not
> 100% sure about this (and it's way to early on a monday to bother
> checking up ;-) ...
> maybe someone else can chime in?

Actually, after you urlencode() the values, you should htmlentities
the whole URL, as it is being passed to HTML as a value to be output
to HTML.

The whole URL should *NOT* be URL-encoded, however.

-- 
Some people have a "gift" link here.
Know what I want?
I want you to buy a CD from some indie artist.
http://cdbaby.com/from/lynch
Yeah, I get a buck. So?

-- 
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Re: [PHP] $_GET and multiple spaces.

[Richard Lynch]

On Sun, January 13, 2008 6:04 pm, Churchill, Craig wrote:
> One of the values I'm passing in a URL string contains multiple
> spaces.
>
> ...
> (The multiple spaces are between Argononemertes and australiensis)

*ALL* data passed by URL to GET should be urlencoded:
http://php.net/urlencode

urlencode will preserve your data.

-- 
Some people have a "gift" link here.
Know what I want?
I want you to buy a CD from some indie artist.
http://cdbaby.com/from/lynch
Yeah, I get a buck. So?

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Re: [PHP] $_GET and multiple spaces.

[Jochem Maas]

thanks, Nisse, for clearing up my half-baked-monday-morning answer.
AFAICT (now that I have woken up somewhat) you are indeed correct.

Nisse Engström schreef:

On Mon, 14 Jan 2008 10:17:03 +0100, Jochem Maas wrote:


clive schreef:
Hi - What Al said, but you want to use the url_encode/url_decode 
functions in php

you don't need to use url_decode() because php will do that automatically
for incoming data - the caveat being situations where double urlencoding is
being used (anyone playing with multiple redirection and such will feel what
I mean), that is not the situation here

e.g.:
echo '...';

I think actually the whole url should be urlencoded as a matter of course, not
100% sure about this (and it's way to early on a monday to bother checking up 
;-) ...
maybe someone else can chime in?


   If you urlencode() the whole url you'll end up with
'%3F' and '%3D' instead of '?' and '=', and you certainly
don't want that[1]. The above is fine, but if you don't know
for sure that the parameter name is a safe string, you'll
need:

   $name_url  = urlencode ($name);
   $value_url = urlencode ($value);
   echo "...";

Or to generalize[2]...

   $n1_url = urlencode ($name1);
   /* and so on... */
   $c_html = htmlspecialchars ($content);
   /* or htmlentities() */

   echo "$c_html";


That is, unless I've totally missed the boat here. :-)

See also the examples at:

   


/Nisse


[1]: The '?' and '=' (and '&') characters have special meaning
 in the url and must retain that meaning for the url to
 work, so the charcters must only be escaped inside the
 name and value parts of the url.

[2]: Note also that the '&' character must, in addition to any
 url escapes, be escaped as '&' when used in an HTML
 attribute.



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Re: [PHP] $_GET and multiple spaces.

[Nisse Engström]

On Mon, 14 Jan 2008 10:17:03 +0100, Jochem Maas wrote:

> clive schreef:
>> Hi - What Al said, but you want to use the url_encode/url_decode 
>> functions in php
> 
> you don't need to use url_decode() because php will do that automatically
> for incoming data - the caveat being situations where double urlencoding is
> being used (anyone playing with multiple redirection and such will feel what
> I mean), that is not the situation here
> 
> e.g.:
> echo ' australiensis"), '">...';
> 
> I think actually the whole url should be urlencoded as a matter of course, not
> 100% sure about this (and it's way to early on a monday to bother checking up 
> ;-) ...
> maybe someone else can chime in?

   If you urlencode() the whole url you'll end up with
'%3F' and '%3D' instead of '?' and '=', and you certainly
don't want that[1]. The above is fine, but if you don't know
for sure that the parameter name is a safe string, you'll
need:

   $name_url  = urlencode ($name);
   $value_url = urlencode ($value);
   echo "...";

Or to generalize[2]...

   $n1_url = urlencode ($name1);
   /* and so on... */
   $c_html = htmlspecialchars ($content);
   /* or htmlentities() */

   echo "$c_html";


That is, unless I've totally missed the boat here. :-)

See also the examples at:

   


/Nisse


[1]: The '?' and '=' (and '&') characters have special meaning
 in the url and must retain that meaning for the url to
 work, so the charcters must only be escaped inside the
 name and value parts of the url.

[2]: Note also that the '&' character must, in addition to any
 url escapes, be escaped as '&' when used in an HTML
 attribute.

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Re: [PHP] $_GET and multiple spaces.

[Jochem Maas]

clive schreef:
Hi - What Al said, but you want to use the url_encode/url_decode 
functions in php


you don't need to use url_decode() because php will do that automatically
for incoming data - the caveat being situations where double urlencoding is
being used (anyone playing with multiple redirection and such will feel what
I mean), that is not the situation here

e.g.:
echo '...';

I think actually the whole url should be urlencoded as a matter of course, not
100% sure about this (and it's way to early on a monday to bother checking up 
;-) ...
maybe someone else can chime in?



Clive

Churchill, Craig wrote:

Hello,

One of the values I'm passing in a URL string contains multiple spaces.

...

(The multiple spaces are between Argononemertes and australiensis)

However when I retrieve the value using $_GET[DarScientificName]
there is only a single space between the two names which I understand 
is the intended behaviour?


Is there a way to preserve the multiple spaces?

Thanks
Craig.



Craig Churchill
Collection Systems Specialist
Museum Victoria
GPO Box 666
Melbourne VIC 3001
Australia
Telephone   +61 3 8341 7743
Email [EMAIL PROTECTED]
 


museumvictoria.com.au
This e-mail is solely for the named addressee and may be 
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e-mail, please notify [EMAIL PROTECTED] by e-mail 
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Re: [PHP] $_GET and multiple spaces.

[clive]

Hi - What Al said, but you want to use the url_encode/url_decode 
functions in php


Clive

Churchill, Craig wrote:

Hello,

One of the values I'm passing in a URL string contains multiple spaces.

...
(The multiple spaces are between Argononemertes and australiensis)

However when I retrieve the value using $_GET[DarScientificName]
there is only a single space between the two names which I understand is the 
intended behaviour?

Is there a way to preserve the multiple spaces?

Thanks
Craig.



Craig Churchill
Collection Systems Specialist
Museum Victoria
GPO Box 666
Melbourne VIC 3001
Australia
Telephone   +61 3 8341 7743
Email [EMAIL PROTECTED]
 


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