Thank you, Jeromie, for the useful explanation. Let me
clarify the problem Im having a bit more:
I retrieve rows of data from tables and display them
in html TABLE format. Each operation retrieves the
rows as an array, which I then use foreach ($row as
$value) to print on the screen.
Now this works fine but the screen also has other
graphics, buttons, etc. What I want to do is to add a
button where a user can click and the SAME array of
data is retrieved again but displayed, this time, in
comma-separated rows. It has been a big challenge for
me. The only way I could think of is to have a hidden
field in a form with the new submit button I want to
add, like so:-
<form action =
'display_as_comma_separated_fields.php'>
<input type = 'hidden' name = 'rows' value = '$row'>
<input type = 'button' name = 'submit' type =
'submit'>
</form>
Note the value of the hidden field i.e. $row. This
$row is the array already retrieved from the database
table.
Then, I thought, I could post it to the other php page
and process it again, using "foreach". In theory this
seemed perfectly okay but when I do it like this:-
#on page: 'display_as_comma_separated_fields.php' #
$rows = $_POST['rows']; // the array passed in the
hidden field
if ($submit)
{
foreach ($rows as $value)
{
echo $value[0] . ',' $value[1] . ','$value[2] .
'<br>';
}
}
For some reason, I get the error:
Warning: Invalid argument supplied for foreach()..
.. and for the life of me I cant see why !!!
Any suggestion? Many thanks
--- Jeromie Clark <[EMAIL PROTECTED]> wrote:
---------------------------------
It's hard without some context, but I'm guessing that
you should be
looking for your post results in the global $_POST
variable, but you're not.
Example:
You've got a form, with an element called "item":
<form method='POST' action='target_url.php'>
<input type='text' name='item'>
<input type='submit' value='Go >>'>
On your target page, the value from the form is going
to be in the
$_POST array.
example:
echo $_POST['item'];
Also, if you need to post an array of data via a form,
you can have
multiple elements with the same name.
This is commonly used for checkboxes, where you can
have multiple
specified values for one field:
<form method='POST' action='target_url.php'>
<input type='checkbox' name='colors[]' value='red'>
<input type='checkbox' name='colors[]' value='blue'>
<input type='checkbox' name='colors[]' value='green'>
</form>
The '[]' at the end of the name tells PHP to compile
all the values into
an array for you.
Then, you could do:
foreach($_POST['colors'] AS $color) {
echo $color . ",";
}
Hope that helps,
Jeromie
>Hello
>I have this problem that seems at the surface dead
>easy .., yet ive been struggling with it for a couple
>of days
>
>Id like to give users the option of saving selected
>data by clicking on a button. When this is done, the
>same rows would be displayed but this time with
>comma-separated values, and nothing else. No graphics
>or other options/buttons on the screen. Then a user
>would simply save the page as text or html.
>
>What I have been trying to do without success, is to
>post the array in a hidden field to another page.
And
>then try :
>foreach ($array as $value){
>
>etc..}
>
>But for some reason that has not worked for me. I
>keep gettin the error :
>Warning: Invalid argument supplied for foreach() ..
>
>Your suggestions are greatly appreciated,
>
>David
>
>
>
>
>
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