$_POST not always set?

[Adrian Parker]

Is it possible to click on a button, and not have it's value and name stored
in _POST?

I have this script with a button on it. When you click the button, the page
posts to itself. The first time you click this Save Changes button, _POST
is empty. After clicking the button, and the page is loaded again, if you
click Save Changes once more the _POST is properly set. What's up with
that?



$studentCode; // Will hold the current student code, if applicable

....

foreach(array_k eys($_POST) as $key)
{
$$key = $_POST[$key];
print "$key is ${$key}<br />";
echo "It is: " . $_POST["Submit"] . "<br>";
}


if ($_POST["Submit"] == "Add Student") // Save button was hit
addRecord();
elseif ($_POST["Submit"] == "Save Changes") // Save changes button was hit
updateStudent() ;
echo "We're saving changes<br>";
elseif ($_GET["action"] != "add")
getOldData($rec ord);



echo "<table summary=\"\" cellpadding=\"5 \">";

function printLabelCell( )
{
echo "\n<tr><td align=\"right\" >";
}

if (isset($_GET["studentCod e"]))
$studentCode = $_GET["studentCod e"];
elseif (isset($_POST["studentCod e"]))
$studentCode = $_POST["studentCod e"];

if ($studentCode != "")
$postType = "post?studentCo de=" . $studentCode;
else
$postType = "post";

echo '<form action="addEdit Student.php" method="' . $postType . '">';

// ... print controls in the cells ...

echo "<tr><td colspan=\"2\" align=\"center\ ">";

echo '<br>';

if ($_GET["action"] == "add" or isset($_POST["firstName"]))
echo '<input type="Submit" name="Submit" value="Add Student">&nbsp;
&nbsp; &nbsp; ';
else
echo '<input type="Submit" name="Submit" value="Save Changes">';

echo '&nbsp; &nbsp; &nbsp; <input type="Reset" name="Reset" value="Clear
Data"><br><br>' ;

echo "</td></tr></table>";

echo "</form>";

function DisplayTextbox( $vname, $size, $value)
{
echo "</td><td><Input type=\"text\" name = \"" . $vname . "\" Size = \""
.. $size . "\" value=\"" . $value . "\"></td></tr>";
}

mysql_close($li nk);


....



<Ade
--
Adrian Parker. Ordained priest. <adrian.parker@ sympatico.ca>

"A society that views graphic violence as entertainment ...should not be
surprised when senseless violence shatters the dreams of it's youngest and
brightest..." - Ensign (March 2004)

[Adrian Parker]

Re: $_POST not always set?


"Adrian Parker" <adrian.parker@ NOSPAMsympatico .ca> wrote in message
news:ZHckc.4185 0$OU.975473@new s20.bellglobal. com...[color=blue]
> Is it possible to click on a button, and not have it's value and name[/color]
stored[color=blue]
> in _POST?
>
> I have this script with a button on it. When you click the button, the[/color]
page[color=blue]
> posts to itself. The first time you click this Save Changes button, _POST
> is empty. After clicking the button, and the page is loaded again, if you
> click Save Changes once more the _POST is properly set. What's up with
> that?[/color]

Methinks my problem comes about when I try to force data into _POST.

method="post?ac tion=....

Is there a solution to this?


Adrian


[color=blue]
>
>
>
> $studentCode; // Will hold the current student code, if applicable
>
> ...
>
> foreach(array_k eys($_POST) as $key)
> {
> $$key = $_POST[$key];
> print "$key is ${$key}<br />";
> echo "It is: " . $_POST["Submit"] . "<br>";
> }
>
>
> if ($_POST["Submit"] == "Add Student") // Save button was hit
> addRecord();
> elseif ($_POST["Submit"] == "Save Changes") // Save changes button was[/color]
hit[color=blue]
> updateStudent() ;
> echo "We're saving changes<br>";
> elseif ($_GET["action"] != "add")
> getOldData($rec ord);
>
>
>
> echo "<table summary=\"\" cellpadding=\"5 \">";
>
> function printLabelCell( )
> {
> echo "\n<tr><td align=\"right\" >";
> }
>
> if (isset($_GET["studentCod e"]))
> $studentCode = $_GET["studentCod e"];
> elseif (isset($_POST["studentCod e"]))
> $studentCode = $_POST["studentCod e"];
>
> if ($studentCode != "")
> $postType = "post?studentCo de=" . $studentCode;
> else
> $postType = "post";
>
> echo '<form action="addEdit Student.php" method="' . $postType . '">';
>
> // ... print controls in the cells ...
>
> echo "<tr><td colspan=\"2\" align=\"center\ ">";
>
> echo '<br>';
>
> if ($_GET["action"] == "add" or isset($_POST["firstName"]))
> echo '<input type="Submit" name="Submit" value="Add Student">&nbsp;
> &nbsp; &nbsp; ';
> else
> echo '<input type="Submit" name="Submit" value="Save Changes">';
>
> echo '&nbsp; &nbsp; &nbsp; <input type="Reset" name="Reset" value="Clear
> Data"><br><br>' ;
>
> echo "</td></tr></table>";
>
> echo "</form>";
>
> function DisplayTextbox( $vname, $size, $value)
> {
> echo "</td><td><Input type=\"text\" name = \"" . $vname . "\" Size =[/color]
\""[color=blue]
> . $size . "\" value=\"" . $value . "\"></td></tr>";
> }
>
> mysql_close($li nk);
>
>
> ...
>
>
>
> <Ade
> --
> Adrian Parker. Ordained priest. <adrian.parker@ sympatico.ca>
>
> "A society that views graphic violence as entertainment ...should not be
> surprised when senseless violence shatters the dreams of it's youngest and
> brightest..." - Ensign (March 2004)
>
>[/color]

[Jan Pieter Kunst]

Re: $_POST not always set?

In article <ZHckc.41850$OU .975473@news20. bellglobal.com> ,
"Adrian Parker" <adrian.parker@ NOSPAMsympatico .ca> wrote:
[color=blue]
> if ($studentCode != "")
> $postType = "post?studentCo de=" . $studentCode;
> else
> $postType = "post";
>
> echo '<form action="addEdit Student.php" method="' . $postType . '">';[/color]


As far as I know, this isn't correct. method is either "post" or "get".
If the method is "post", you put your variables into $_POST like this:

echo '<form action="addEdit Student.php" method="post">' ;
echo '<input type="hidden" name="studentCo de" value="' . $studentCode .
'">';
echo '</form>';

JP

--
Sorry, <devnull@cauce. org> is een "spam trap".
E-mail adres is <jpk"at"akamail .com>, waarbij "at" = @.

[Pedro Graca]

Re: $_POST not always set?

Jan Pieter Kunst wrote:[color=blue]
> In article <ZHckc.41850$OU .975473@news20. bellglobal.com> ,
> "Adrian Parker" <adrian.parker@ NOSPAMsympatico .ca> wrote:
>[color=green]
>> if ($studentCode != "")
>> $postType = "post?studentCo de=" . $studentCode;
>> else
>> $postType = "post";
>>
>> echo '<form action="addEdit Student.php" method="' . $postType . '">';[/color]
>
>
> As far as I know, this isn't correct. method is either "post" or "get".
> If the method is "post", you put your variables into $_POST like this:
>
> echo '<form action="addEdit Student.php" method="post">' ;
> echo '<input type="hidden" name="studentCo de" value="' . $studentCode .
> '">';
> echo '</form>';[/color]

You can do a POST and pass parameters in the URL, then treat them as if
they were a GET:

<form action="whateve r.php?course=17 " method="post">
<input type="hidden" name="studentCo de" value="542"/>
<input type="submit"/>
</form>

The script that receives the POST from this form can do

## course is available in the $_GET array,
## but this was NOT a GET request!
if ($_GET['course'] != '17') {
exit('Error: course must be 17.');
}

if ($_POST['studentCode'] != '542') {
exit('Error: studentCode must be 542.');
}


--
USENET would be a better place if everybody read: : mail address :
http://www.catb.org/~esr/faqs/smart-questions.html : is valid for :
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[Kelly Thompson]

Re: $_POST not always set?

On 29 Apr 2004 20:46:56 GMT
Pedro Graca <hexkid@hotpop. com> wrote:
[color=blue]
> Jan Pieter Kunst wrote:[color=green]
> > In article <ZHckc.41850$OU .975473@news20. bellglobal.com> ,
> > "Adrian Parker" <adrian.parker@ NOSPAMsympatico .ca> wrote:
> >[color=darkred]
> >> if ($studentCode != "")
> >> $postType = "post?studentCo de=" . $studentCode;
> >> else
> >> $postType = "post";
> >>
> >> echo '<form action="addEdit Student.php" method="' . $postType[/color]
> >. '">';
> >
> >
> > As far as I know, this isn't correct. method is either "post" or
> > "get". If the method is "post", you put your variables into $_POST
> > like this:
> >
> > echo '<form action="addEdit Student.php" method="post">' ;
> > echo '<input type="hidden" name="studentCo de" value="' .
> > $studentCode . '">';
> > echo '</form>';[/color]
>
> You can do a POST and pass parameters in the URL, then treat them as
> if they were a GET:
>
> <form action="whateve r.php?course=17 " method="post">
> <input type="hidden" name="studentCo de" value="542"/>
> <input type="submit"/>
> </form>
>
> The script that receives the POST from this form can do
>
> ## course is available in the $_GET array,
> ## but this was NOT a GET request!
> if ($_GET['course'] != '17') {
> exit('Error: course must be 17.');
> }
>
> if ($_POST['studentCode'] != '542') {
> exit('Error: studentCode must be 542.');
> }[/color]

You can also do

$_FOO = array_merge($_G ET, $_POST);

and use $_FOO instead of $_GET or $_POST. Just remember that the keys
from $_POST will overwrite any equal key on $_GET.

[Pedro Graca]

Re: $_POST not always set?

Kelly Thompson wrote:[color=blue]
> You can also do
>
> $_FOO = array_merge($_G ET, $_POST);
>
> and use $_FOO instead of $_GET or $_POST. Just remember that the keys
> from $_POST will overwrite any equal key on $_GET.[/color]

Or use the $_REQUEST array, which inludes $_GET, $_POST, and $_COOKIE :)

--------

<?php // xx.php
setcookie('all' , 'cookie');
setcookie('COOK IE', 'cookie');
?>

<form action="xx2.php ?all=get&GET=ge t" method="post">
<input type="hidden" name="all" value="post"/>
<input type="hidden" name="POST" value="post"/>
<input type="submit"/>
</form>

--------

<?php // xx2.php
header('Content-Type: text/plain');

echo '$_GET: '; print_r($_GET);
echo '$_POST: '; print_r($_POST) ;
echo '$_COOKIE: '; print_r($_COOKI E);
echo '$_REQUEST: '; print_r($_REQUE ST);
?>

--------

Result is:

$_GET: Array
(
[all] => get
[GET] => get
)
$_POST: Array
(
[all] => post
[POST] => post
)
$_COOKIE: Array
(
[COOKIE] => cookie
[all] => cookie
)
$_REQUEST: Array
(
[all] => cookie
[GET] => get
[POST] => post
[COOKIE] => cookie
)

--
USENET would be a better place if everybody read: : mail address :
http://www.catb.org/~esr/faqs/smart-questions.html : is valid for :
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[Jedi121]

Re: $_POST not always set?

Adrian Parker a écrit le 29/04/2004 :
[...][color=blue]
> if ($studentCode != "")
> $postType = "post?studentCo de=" . $studentCode;
> else
> $postType = "post";
>
> echo '<form action="addEdit Student.php" method="' . $postType . '">';
>[/color]

Not checked but consider puting the studentCode= in the target URL of
the form and not in the method.
Try this :

if ($studentCode != "") {
$postUrl = "addEditStudent .php?studentCod e=".$studentCod e;
} else {
$postUrl = "addEditStudent .php";
}
echo '<form action="'.$post Url.'" method="POST">' ;

[Eric Bohlman]

Re: $_POST not always set?

Pedro Graca <hexkid@hotpop. com> wrote in news:c6rtun$fkl fl$1@ID-
203069.news.uni-berlin.de:
[color=blue]
> Or use the $_REQUEST array, which inludes $_GET, $_POST, and $_COOKIE :)[/color]

That depends on a setting in php.ini, so I wouldn't recommend it to newbies
or to anyone who doesn't have complete control over their server. Using it
mindlessly can result in code that mysteriously breaks when moved to
another system.

[Kelly Thompson]

Re: $_POST not always set?

On 29 Apr 2004 23:05:36 GMT
Eric Bohlman <ebohlman@earth link.net> wrote:
[color=blue]
> Pedro Graca <hexkid@hotpop. com> wrote in news:c6rtun$fkl fl$1@ID-
> 203069.news.uni-berlin.de:
>[color=green]
> > Or use the $_REQUEST array, which inludes $_GET, $_POST, and
> > $_COOKIE :)[/color]
>
> That depends on a setting in php.ini, so I wouldn't recommend it to
> newbies or to anyone who doesn't have complete control over their
> server. Using it mindlessly can result in code that mysteriously
> breaks when moved to another system.[/color]

Which setting?

[Pedro Graca]

Re: $_POST not always set?

Kelly Thompson wrote:[color=blue]
> On 29 Apr 2004 23:05:36 GMT
> Eric Bohlman <ebohlman@earth link.net> wrote:
>[color=green]
>> Pedro Graca <hexkid@hotpop. com> wrote in news:c6rtun$fkl fl$1@ID-
>> 203069.news.uni-berlin.de:
>>[color=darkred]
>> > Or use the $_REQUEST array, which inludes $_GET, $_POST, and
>> > $_COOKIE :)[/color]
>>
>> That depends on a setting in php.ini, so I wouldn't recommend it to
>> newbies or to anyone who doesn't have complete control over their
>> server. Using it mindlessly can result in code that mysteriously
>> breaks when moved to another system.[/color][/color]

Thank you for pointing that out, Eric.
[color=blue]
> Which setting?[/color]

gpc_order


In my php.ini it is

gpc_order = "GPC"

so if there is a $_GET['x'], a $_POST['x'], and a $_CCOKIE['x']
on my configuration $_REQUEST['x'] will be $_COOKIE['x']

--
USENET would be a better place if everybody read: : mail address :
http://www.catb.org/~esr/faqs/smart-questions.html : is valid for :
http://www.netmeister.org/news/learn2quote2.html : "text/plain" :
http://www.expita.com/nomime.html : to 10K bytes :

[Kelly Thompson]

Re: $_POST not always set?

On 30 Apr 2004 00:27:22 GMT
Pedro Graca <hexkid@hotpop. com> wrote:
[color=blue]
> Kelly Thompson wrote:[color=green]
> > On 29 Apr 2004 23:05:36 GMT
> > Eric Bohlman <ebohlman@earth link.net> wrote:
> >[color=darkred]
> >> Pedro Graca <hexkid@hotpop. com> wrote in news:c6rtun$fkl fl$1@ID-
> >> 203069.news.uni-berlin.de:
> >>
> >> > Or use the $_REQUEST array, which inludes $_GET, $_POST, and
> >> > $_COOKIE :)
> >>
> >> That depends on a setting in php.ini, so I wouldn't recommend it[/color]
> >to> newbies or to anyone who doesn't have complete control over
> >their> server. Using it mindlessly can result in code that
> >mysteriously > breaks when moved to another system.[/color]
>
> Thank you for pointing that out, Eric.
>[color=green]
> > Which setting?[/color]
>
> gpc_order
>
> In my php.ini it is
>
> gpc_order = "GPC"
>
> so if there is a $_GET['x'], a $_POST['x'], and a $_CCOKIE['x']
> on my configuration $_REQUEST['x'] will be $_COOKIE['x'][/color]

Then one more reason to do it yourself with array_merge().

[lawrence]

Re: $_POST not always set?

I often run into situations where there is nothing stored in $_POST.
For me, whenever I run into this, it turns out that the version of PHP
on the server I'm on is pre- version 4.1.