[PHP-DB] HTML Forms question...
I know that this is not the forum for this question, I am only looking for a pointer in the right direction here. I need to gain a better understanding of HTML forms, specifically checkboxes. What I am looking for is once I present a list of checkboxes and the user makes his selections, how is this presented to the subsequent pages? Does anyone know of a website that has a tutorial or good explanation of how this works? Thanks in advance. Scott Nipp Phone: (214) 858-1289 E-mail: [EMAIL PROTECTED] Web: http:\\ldsa.sbcld.sbc.com -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP-DB] HTML Forms question...
input type=checkbox name=checkbox1 value=scoobydoo if this is checked the value scoobydoo will be put into the array with index checkbox1 which array is dependant on which method your form uses. :-) If it is not checked then there is no entry. in PHP with register_globals on the variable $checkbox1 will equal scoobydoo and not be set if the box is not checked. hope this helps... Ryan -Original Message- From: NIPP, SCOTT V (SBCSI) [mailto:[EMAIL PROTECTED]] Sent: Tuesday, November 19, 2002 9:28 AM To: '[EMAIL PROTECTED]' Subject: [PHP-DB] HTML Forms question... I know that this is not the forum for this question, I am only looking for a pointer in the right direction here. I need to gain a better understanding of HTML forms, specifically checkboxes. What I am looking for is once I present a list of checkboxes and the user makes his selections, how is this presented to the subsequent pages? Does anyone know of a website that has a tutorial or good explanation of how this works? Thanks in advance. Scott Nipp Phone: (214) 858-1289 E-mail: [EMAIL PROTECTED] Web: http:\\ldsa.sbcld.sbc.com -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP-DB] HTML Forms question...
OK. If I am using the POST method and the checkbox 'name' for all of the checkboxes is 'system', how do I access the results? I am researching on the PHP site trying to figure out what this array is, and how I access this if the index name is the same for all elements. I am hoping that this data will be in an array and I can simply loop through the contents of the array. If this data is stored in a hash (Perl word for this type of array, not sure if it's the same in PHP), how do I access this data since the index for every element would be the same? I am SURE that I am probably missing some important conceptual issues here, but still learning as I go. Unfortunately, this probably means that I will be completely rewriting this application at least once in the future. Oh well, live and learn. Thanks again for the help. -Original Message- From: Ryan Jameson (USA) [mailto:[EMAIL PROTECTED]] Sent: Tuesday, November 19, 2002 10:35 AM To: [EMAIL PROTECTED] Subject: RE: [PHP-DB] HTML Forms question... input type=checkbox name=checkbox1 value=scoobydoo if this is checked the value scoobydoo will be put into the array with index checkbox1 which array is dependant on which method your form uses. :-) If it is not checked then there is no entry. in PHP with register_globals on the variable $checkbox1 will equal scoobydoo and not be set if the box is not checked. hope this helps... Ryan -Original Message- From: NIPP, SCOTT V (SBCSI) [mailto:[EMAIL PROTECTED]] Sent: Tuesday, November 19, 2002 9:28 AM To: '[EMAIL PROTECTED]' Subject: [PHP-DB] HTML Forms question... I know that this is not the forum for this question, I am only looking for a pointer in the right direction here. I need to gain a better understanding of HTML forms, specifically checkboxes. What I am looking for is once I present a list of checkboxes and the user makes his selections, how is this presented to the subsequent pages? Does anyone know of a website that has a tutorial or good explanation of how this works? Thanks in advance. Scott Nipp Phone: (214) 858-1289 E-mail: [EMAIL PROTECTED] Web: http:\\ldsa.sbcld.sbc.com -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DB] HTML Forms question...
OK. If I am using the POST method and the checkbox 'name' for all of the checkboxes is 'system', how do I access the results? I am researching on the PHP site trying to figure out what this array is, and how I access this if the index name is the same for all elements. I am hoping that this data will be in an array and I can simply loop through the contents of the array. If this data is stored in a hash (Perl word for this type of array, not sure if it's the same in PHP), how do I access this data since the index for every element would be the same? I am SURE that I am probably missing some important conceptual issues here, but still learning as I go. Unfortunately, this probably means that I will be completely rewriting this application at least once in the future. Oh well, live and learn. Thanks again for the help. If you have multiple checkboxes with the same 'name' then you should name then with brackets, [], such as 'system[]'. This will tell PHP to make the results an array when the form is submitted. For any of the 'submit[]' checkboxes that are checked, they will be present in PHP array on the processing page. Those unchecked will not be present. Say you have the following. input type=checkbox name=submit[] value=1One input type=checkbox name=submit[] value=2Two input type=checkbox name=submit[] value=3Three If the method on your form is POST, and the user checks One and Three, then you'll have the following values in PHP on the ACTION page of the FORM. $_POST['submit'][0] == 1 $_POST['submit'][1] == 3 From that data, though, there's no way to tell that checkbox Two was not checked, unless you go through and check all of the values. That's fine for small forms, but a hassle for large ones. You could also name your checkboxes like this: input type=checkbox name=submit[1] value=1One input type=checkbox name=submit[2] value=2Two input type=checkbox name=submit[3] value=3Three and if the user checks one and three again, you'll get $_POST['submit'][1] == 1 $_POST['submit'][3] == 3 Hopefully that clears some things up. If you have any other questions, just ask. ---John Holmes... -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP-DB] HTML Forms question...
If you name the checkbox as name=system[] then PHP will automatically create an array of the checkbox values which can be subsequently accessed via $_POST['system'][n] - be warned however that the '[]' can screw up any JavaScript code that refers to the checkbox object... HTH Rich -Original Message- From: NIPP, SCOTT V (SBCSI) [mailto:[EMAIL PROTECTED]] Sent: 19 November 2002 08:53 To: 'Ryan Jameson (USA)'; [EMAIL PROTECTED] Subject: RE: [PHP-DB] HTML Forms question... OK. If I am using the POST method and the checkbox 'name' for all of the checkboxes is 'system', how do I access the results? I am researching on the PHP site trying to figure out what this array is, and how I access this if the index name is the same for all elements. I am hoping that this data will be in an array and I can simply loop through the contents of the array. If this data is stored in a hash (Perl word for this type of array, not sure if it's the same in PHP), how do I access this data since the index for every element would be the same? I am SURE that I am probably missing some important conceptual issues here, but still learning as I go. Unfortunately, this probably means that I will be completely rewriting this application at least once in the future. Oh well, live and learn. Thanks again for the help. -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP-DB] HTML Forms question...
You learn something new every day! I'll have to remember the [] thing.
My way of handling this situation that does not screw up JavaScript is to assign the
names sequentially, so instead of all the checkboxes being system they would be
system0,system1,... Since PHP is so wonderfully easy to use for referencing variable
variable names I simply loop through:
for($i=0;$iNUMBEROFCHECKBOXES;$i++){
$var = system$i;
$val = $$var;
if (isset($$var)) //--- I think this works.
echo $var = $valbr;
else
echo $var is not checked.;
}
Since I always end up creating the form in PHP I just have the algorithm put a hidden
field in the form that contains the number of checkboxes, in fact my PHP usually
creates the JavaScript code as well, so it ends up being pretty flexible.
Ryan
-Original Message-
From: Rich Gray [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, November 19, 2002 6:13 PM
To: NIPP, SCOTT V (SBCSI); [EMAIL PROTECTED]
Subject: RE: [PHP-DB] HTML Forms question...
If you name the checkbox as name=system[] then PHP will automatically
create an array of the checkbox values which can be subsequently accessed
via $_POST['system'][n] - be warned however that the '[]' can screw up any
JavaScript code that refers to the checkbox object...
HTH
Rich
-Original Message-
From: NIPP, SCOTT V (SBCSI) [mailto:[EMAIL PROTECTED]]
Sent: 19 November 2002 08:53
To: 'Ryan Jameson (USA)'; [EMAIL PROTECTED]
Subject: RE: [PHP-DB] HTML Forms question...
OK. If I am using the POST method and the checkbox 'name' for all
of the checkboxes is 'system', how do I access the results? I am
researching on the PHP site trying to figure out what this array is, and how
I access this if the index name is the same for all elements. I am hoping
that this data will be in an array and I can simply loop through the
contents of the array. If this data is stored in a hash (Perl word for this
type of array, not sure if it's the same in PHP), how do I access this data
since the index for every element would be the same?
I am SURE that I am probably missing some important conceptual
issues here, but still learning as I go. Unfortunately, this probably means
that I will be completely rewriting this application at least once in the
future. Oh well, live and learn. Thanks again for the help.
--
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RE: [PHP-DB] HTML Forms question...
-Original Message- From: Rich Gray [mailto:[EMAIL PROTECTED]] Sent: 20 November 2002 01:13 If you name the checkbox as name=system[] then PHP will automatically create an array of the checkbox values which can be subsequently accessed via $_POST['system'][n] - be warned however that the '[]' can screw up any JavaScript code that refers to the checkbox object... G' -- not this old chestnut again! It only screws up your JavaScript if you don't write your JavaScript to allow for it. It's really very simple: *by* *definition* in JavaScript, the notation a.b is *identical* to a[b] Thus, if you have a single checkbox named with name=system, then you can access it in either of these ways: document.form.system document.form[system] By extension, if you have multiple checkboxes all named with name=system[], you can refer to them as: document.form[system[]][0] document.form[system[]][1] document.form[system[]][2] etc... I know this works because I've been using it for years (even before I started programming with PHP!). 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 Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP-DB] HTML Forms question...
Not only does Mike's description below work really well for a single page, if you write all of your JS stuff like this, you can very easily use the same script on multiple pages. Portability! Works great for me. -Original Message- From: Ford, Mike [LSS] [mailto:[EMAIL PROTECTED]] Sent: Tuesday, November 19, 2002 1:35 PM To: 'Rich Gray'; NIPP, SCOTT V (SBCSI); [EMAIL PROTECTED] Subject: RE: [PHP-DB] HTML Forms question... -Original Message- From: Rich Gray [mailto:[EMAIL PROTECTED]] Sent: 20 November 2002 01:13 If you name the checkbox as name=system[] then PHP will automatically create an array of the checkbox values which can be subsequently accessed via $_POST['system'][n] - be warned however that the '[]' can screw up any JavaScript code that refers to the checkbox object... G' -- not this old chestnut again! It only screws up your JavaScript if you don't write your JavaScript to allow for it. It's really very simple: *by* *definition* in JavaScript, the notation a.b is *identical* to a[b] Thus, if you have a single checkbox named with name=system, then you can access it in either of these ways: document.form.system document.form[system] By extension, if you have multiple checkboxes all named with name=system[], you can refer to them as: document.form[system[]][0] document.form[system[]][1] document.form[system[]][2] etc... I know this works because I've been using it for years (even before I started programming with PHP!). 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 Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP-DB] HTML Forms question...
Let me append my earlier post.
If you write a function like this:
function myfunction(name){
document.form.name.do_something_legal_to_this_object
}
All you have to do on subsequent pages is pass the name of the object into
the function and you're good to go (e.g.
onClick=javascript:myfunction(objectName)) as long as the function is
included in the page.
Sorry for any confusion.
-Original Message-
From: Hutchins, Richard [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, November 19, 2002 1:45 PM
To: [EMAIL PROTECTED]
Subject: RE: [PHP-DB] HTML Forms question...
Not only does Mike's description below work really well for a
single page,
if you write all of your JS stuff like this, you can very
easily use the
same script on multiple pages. Portability! Works great for me.
-Original Message-
From: Ford, Mike [LSS] [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, November 19, 2002 1:35 PM
To: 'Rich Gray'; NIPP, SCOTT V (SBCSI); [EMAIL PROTECTED]
Subject: RE: [PHP-DB] HTML Forms question...
-Original Message-
From: Rich Gray [mailto:[EMAIL PROTECTED]]
Sent: 20 November 2002 01:13
If you name the checkbox as name=system[] then PHP will
automatically
create an array of the checkbox values which can be
subsequently accessed
via $_POST['system'][n] - be warned however that the '[]' can
screw up any
JavaScript code that refers to the checkbox object...
G' -- not this old chestnut again!
It only screws up your JavaScript if you don't write your
JavaScript to
allow for it.
It's really very simple: *by* *definition* in JavaScript,
the notation
a.b
is *identical* to
a[b]
Thus, if you have a single checkbox named with name=system,
then you can
access it in either of these ways:
document.form.system
document.form[system]
By extension, if you have multiple checkboxes all named with
name=system[], you can refer to them as:
document.form[system[]][0]
document.form[system[]][1]
document.form[system[]][2]
etc...
I know this works because I've been using it for years
(even before I
started programming with PHP!).
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
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Re: [PHP-DB] HTML Forms question...
Great piece of advice Mike. Thanks. Far from obvious. I was stuck with this problem since a few days. Will that also apply to n-dimensional array, like: document.form[system[]][0][1] ? Ignatius - Original Message - From: Ford, Mike [LSS] [EMAIL PROTECTED] To: 'Rich Gray' [EMAIL PROTECTED]; NIPP, SCOTT V (SBCSI) [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Tuesday, November 19, 2002 7:35 PM Subject: RE: [PHP-DB] HTML Forms question... -Original Message- From: Rich Gray [mailto:[EMAIL PROTECTED]] Sent: 20 November 2002 01:13 If you name the checkbox as name=system[] then PHP will automatically create an array of the checkbox values which can be subsequently accessed via $_POST['system'][n] - be warned however that the '[]' can screw up any JavaScript code that refers to the checkbox object... G' -- not this old chestnut again! It only screws up your JavaScript if you don't write your JavaScript to allow for it. It's really very simple: *by* *definition* in JavaScript, the notation a.b is *identical* to a[b] Thus, if you have a single checkbox named with name=system, then you can access it in either of these ways: document.form.system document.form[system] By extension, if you have multiple checkboxes all named with name=system[], you can refer to them as: document.form[system[]][0] document.form[system[]][1] document.form[system[]][2] etc... I know this works because I've been using it for years (even before I started programming with PHP!). 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 Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP-DB] HTML Forms question...
Javascript... What's that???
Just kidding. I know what it is, but that is about the extent of my
knowledge. Thanks for all the great feedback. I was actually just looking
to be pointed in the right direction as this was a bit outside the scope of
this group. You guys come through in shining fashion though and solve the
problem for me.
Now just to figure out the next 73 issues/steps/challenges/problems.
:)
-Original Message-
From: Ryan Jameson (USA) [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, November 19, 2002 11:44 AM
To: [EMAIL PROTECTED]
Subject: RE: [PHP-DB] HTML Forms question...
You learn something new every day! I'll have to remember the [] thing.
My way of handling this situation that does not screw up JavaScript is to
assign the names sequentially, so instead of all the checkboxes being system
they would be system0,system1,... Since PHP is so wonderfully easy to use
for referencing variable variable names I simply loop through:
for($i=0;$iNUMBEROFCHECKBOXES;$i++){
$var = system$i;
$val = $$var;
if (isset($$var)) //--- I think this works.
echo $var = $valbr;
else
echo $var is not checked.;
}
Since I always end up creating the form in PHP I just have the algorithm put
a hidden field in the form that contains the number of checkboxes, in fact
my PHP usually creates the JavaScript code as well, so it ends up being
pretty flexible.
Ryan
-Original Message-
From: Rich Gray [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, November 19, 2002 6:13 PM
To: NIPP, SCOTT V (SBCSI); [EMAIL PROTECTED]
Subject: RE: [PHP-DB] HTML Forms question...
If you name the checkbox as name=system[] then PHP will automatically
create an array of the checkbox values which can be subsequently accessed
via $_POST['system'][n] - be warned however that the '[]' can screw up any
JavaScript code that refers to the checkbox object...
HTH
Rich
-Original Message-
From: NIPP, SCOTT V (SBCSI) [mailto:[EMAIL PROTECTED]]
Sent: 19 November 2002 08:53
To: 'Ryan Jameson (USA)'; [EMAIL PROTECTED]
Subject: RE: [PHP-DB] HTML Forms question...
OK. If I am using the POST method and the checkbox 'name' for all
of the checkboxes is 'system', how do I access the results? I am
researching on the PHP site trying to figure out what this array is, and how
I access this if the index name is the same for all elements. I am hoping
that this data will be in an array and I can simply loop through the
contents of the array. If this data is stored in a hash (Perl word for this
type of array, not sure if it's the same in PHP), how do I access this data
since the index for every element would be the same?
I am SURE that I am probably missing some important conceptual
issues here, but still learning as I go. Unfortunately, this probably means
that I will be completely rewriting this application at least once in the
future. Oh well, live and learn. Thanks again for the help.
--
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To unsubscribe, visit: http://www.php.net/unsub.php
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RE: [PHP-DB] HTML Forms question...
OK. This has been most helpful, but now I am getting something
strange. The first element of the array of data is behaving strangely. For
the code snippet below I am not getting the first selected element
displayed:
?php
... Some stuff snipped...
$a = 0;
?
?php
while (isset($_POST['system'][$a])) {
$a++;
echo $_POST['system'][$a];
}
?
The second, third, and so forth selections all print, just not the
first one. Also, I can test the contents of the first element by placing an
echo before the while loop. Thanks in advance.
-Original Message-
From: 1LT John W. Holmes [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, November 19, 2002 11:11 AM
To: NIPP, SCOTT V (SBCSI); 'Ryan Jameson (USA)'; [EMAIL PROTECTED]
Subject: Re: [PHP-DB] HTML Forms question...
OK. If I am using the POST method and the checkbox 'name' for all
of the checkboxes is 'system', how do I access the results? I am
researching on the PHP site trying to figure out what this array is, and
how
I access this if the index name is the same for all elements. I am hoping
that this data will be in an array and I can simply loop through the
contents of the array. If this data is stored in a hash (Perl word for
this
type of array, not sure if it's the same in PHP), how do I access this
data
since the index for every element would be the same?
I am SURE that I am probably missing some important conceptual
issues here, but still learning as I go. Unfortunately, this probably
means
that I will be completely rewriting this application at least once in the
future. Oh well, live and learn. Thanks again for the help.
If you have multiple checkboxes with the same 'name' then you should name
then with brackets, [], such as 'system[]'. This will tell PHP to make the
results an array when the form is submitted.
For any of the 'submit[]' checkboxes that are checked, they will be present
in PHP array on the processing page. Those unchecked will not be present.
Say you have the following.
input type=checkbox name=submit[] value=1One
input type=checkbox name=submit[] value=2Two
input type=checkbox name=submit[] value=3Three
If the method on your form is POST, and the user checks One and Three, then
you'll have the following values in PHP on the ACTION page of the FORM.
$_POST['submit'][0] == 1
$_POST['submit'][1] == 3
From that data, though, there's no way to tell that checkbox Two was not
checked, unless you go through and check all of the values. That's fine for
small forms, but a hassle for large ones.
You could also name your checkboxes like this:
input type=checkbox name=submit[1] value=1One
input type=checkbox name=submit[2] value=2Two
input type=checkbox name=submit[3] value=3Three
and if the user checks one and three again, you'll get
$_POST['submit'][1] == 1
$_POST['submit'][3] == 3
Hopefully that clears some things up. If you have any other questions, just
ask.
---John Holmes...
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RE: [PHP-DB] HTML Forms question...
I think it's because you're incrementing $a BEFORE you echo it out. That
would cause your echo statement to start at the second item [1].
-Original Message-
From: NIPP, SCOTT V (SBCSI) [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, November 19, 2002 3:36 PM
To: '1LT John W. Holmes'; 'Ryan Jameson (USA)'; [EMAIL PROTECTED]
Subject: RE: [PHP-DB] HTML Forms question...
OK. This has been most helpful, but now I am getting something
strange. The first element of the array of data is behaving
strangely. For
the code snippet below I am not getting the first selected element
displayed:
?php
... Some stuff snipped...
$a = 0;
?
?php
while (isset($_POST['system'][$a])) {
$a++;
echo $_POST['system'][$a];
}
?
The second, third, and so forth selections all print,
just not the
first one. Also, I can test the contents of the first
element by placing an
echo before the while loop. Thanks in advance.
-Original Message-
From: 1LT John W. Holmes [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, November 19, 2002 11:11 AM
To: NIPP, SCOTT V (SBCSI); 'Ryan Jameson (USA)'; [EMAIL PROTECTED]
Subject: Re: [PHP-DB] HTML Forms question...
OK. If I am using the POST method and the checkbox 'name' for all
of the checkboxes is 'system', how do I access the results? I am
researching on the PHP site trying to figure out what this
array is, and
how
I access this if the index name is the same for all
elements. I am hoping
that this data will be in an array and I can simply loop through the
contents of the array. If this data is stored in a hash
(Perl word for
this
type of array, not sure if it's the same in PHP), how do I
access this
data
since the index for every element would be the same?
I am SURE that I am probably missing some important conceptual
issues here, but still learning as I go. Unfortunately,
this probably
means
that I will be completely rewriting this application at
least once in the
future. Oh well, live and learn. Thanks again for the help.
If you have multiple checkboxes with the same 'name' then you
should name
then with brackets, [], such as 'system[]'. This will tell
PHP to make the
results an array when the form is submitted.
For any of the 'submit[]' checkboxes that are checked, they
will be present
in PHP array on the processing page. Those unchecked will not
be present.
Say you have the following.
input type=checkbox name=submit[] value=1One
input type=checkbox name=submit[] value=2Two
input type=checkbox name=submit[] value=3Three
If the method on your form is POST, and the user checks One
and Three, then
you'll have the following values in PHP on the ACTION page of
the FORM.
$_POST['submit'][0] == 1
$_POST['submit'][1] == 3
From that data, though, there's no way to tell that checkbox
Two was not
checked, unless you go through and check all of the values.
That's fine for
small forms, but a hassle for large ones.
You could also name your checkboxes like this:
input type=checkbox name=submit[1] value=1One
input type=checkbox name=submit[2] value=2Two
input type=checkbox name=submit[3] value=3Three
and if the user checks one and three again, you'll get
$_POST['submit'][1] == 1
$_POST['submit'][3] == 3
Hopefully that clears some things up. If you have any other
questions, just
ask.
---John Holmes...
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RE: [PHP-DB] HTML Forms question...
DUH!!! I'm an idiot. That was quite obvious. Thanks. Sorry for
the stupid question.
-Original Message-
From: Hutchins, Richard [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, November 19, 2002 2:40 PM
To: NIPP, SCOTT V (SBCSI); [EMAIL PROTECTED]
Subject: RE: [PHP-DB] HTML Forms question...
I think it's because you're incrementing $a BEFORE you echo it out. That
would cause your echo statement to start at the second item [1].
-Original Message-
From: NIPP, SCOTT V (SBCSI) [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, November 19, 2002 3:36 PM
To: '1LT John W. Holmes'; 'Ryan Jameson (USA)'; [EMAIL PROTECTED]
Subject: RE: [PHP-DB] HTML Forms question...
OK. This has been most helpful, but now I am getting something
strange. The first element of the array of data is behaving
strangely. For
the code snippet below I am not getting the first selected element
displayed:
?php
... Some stuff snipped...
$a = 0;
?
?php
while (isset($_POST['system'][$a])) {
$a++;
echo $_POST['system'][$a];
}
?
The second, third, and so forth selections all print,
just not the
first one. Also, I can test the contents of the first
element by placing an
echo before the while loop. Thanks in advance.
-Original Message-
From: 1LT John W. Holmes [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, November 19, 2002 11:11 AM
To: NIPP, SCOTT V (SBCSI); 'Ryan Jameson (USA)'; [EMAIL PROTECTED]
Subject: Re: [PHP-DB] HTML Forms question...
OK. If I am using the POST method and the checkbox 'name' for all
of the checkboxes is 'system', how do I access the results? I am
researching on the PHP site trying to figure out what this
array is, and
how
I access this if the index name is the same for all
elements. I am hoping
that this data will be in an array and I can simply loop through the
contents of the array. If this data is stored in a hash
(Perl word for
this
type of array, not sure if it's the same in PHP), how do I
access this
data
since the index for every element would be the same?
I am SURE that I am probably missing some important conceptual
issues here, but still learning as I go. Unfortunately,
this probably
means
that I will be completely rewriting this application at
least once in the
future. Oh well, live and learn. Thanks again for the help.
If you have multiple checkboxes with the same 'name' then you
should name
then with brackets, [], such as 'system[]'. This will tell
PHP to make the
results an array when the form is submitted.
For any of the 'submit[]' checkboxes that are checked, they
will be present
in PHP array on the processing page. Those unchecked will not
be present.
Say you have the following.
input type=checkbox name=submit[] value=1One
input type=checkbox name=submit[] value=2Two
input type=checkbox name=submit[] value=3Three
If the method on your form is POST, and the user checks One
and Three, then
you'll have the following values in PHP on the ACTION page of
the FORM.
$_POST['submit'][0] == 1
$_POST['submit'][1] == 3
From that data, though, there's no way to tell that checkbox
Two was not
checked, unless you go through and check all of the values.
That's fine for
small forms, but a hassle for large ones.
You could also name your checkboxes like this:
input type=checkbox name=submit[1] value=1One
input type=checkbox name=submit[2] value=2Two
input type=checkbox name=submit[3] value=3Three
and if the user checks one and three again, you'll get
$_POST['submit'][1] == 1
$_POST['submit'][3] == 3
Hopefully that clears some things up. If you have any other
questions, just
ask.
---John Holmes...
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