[Resolved] Populating a dynamic form and processing.

[Lemonboi]

Populating a form and processing.

I've got a form where the user is first asked how many rows are required. I then use a 'for' loop to populate the table with each row having 4 fields to fill. I want to be able to name these fields and then to process the form and extract the variables. I've done it as follows but it dosent work, page says unidentified variable.

for ($r = 0 $r <= $rows; $r++){
echo "<tr>";
echo "<td><input name="note$r" etc )</td>"
echo "<td><input name="amount$r" etc )</td>"
echo "<td><input name="rate$r" etc )</td>"
echo "</tr>"
}
Submit button inserted

if(form submitted){
for( $a=0; $a <= $rows; $a++){
$note$a = $_POST['$note$a'];
}

I have also tried changing 'note$r' to note_$r and note[$a]

how should I go about labeling things so that I can create the variables?

[devinemke]

<?php
if (!isset($_POST['submit']))
{
	echo '
	<form action="" method="POST">
	how many rows would you like in your form?
	<input type="text" name="num_rows">
	<input type="submit" name="submit" value="generate form">
	</form>
	';
}

if (isset($_POST['submit']) && $_POST['submit'] == 'generate form')
{
	echo '
	<form action="" method="POST">
	<table border="1">
	<tr>
	<td><b>row</b></td>
	<td><b>note</b></td>
	<td><b>amount</b></td>
	<td><b>rate</b></td>
	</tr>
	';

for ($i = 1; $i <= $_POST['num_rows']; $i++)
{
	echo '
	<tr>
	<td>' . $i . '</td>
	<td><input type="text" name="' . $i . '[note]"></td>
	<td><input type="text" name="' . $i . '[amount]"></td>
	<td><input type="text" name="' . $i . '[rate]"></td>
	</tr>
	';
}

echo '
</table>
<input type="submit" name="submit" value="submit">
</form>
';
}

if (isset($_POST['submit']) && $_POST['submit'] == 'submit')
{
	unset($_POST['submit']);

echo '
you entered:<br>		
<table border="1">
<tr>
<td><b>row</b></td>
<td><b>note</b></td>
<td><b>amount</b></td>
<td><b>rate</b></td>
</tr>
';

foreach ($_POST as $key => $value)
{
	echo '
	<tr>
	<td>' . $key . '</td>
	<td>' . $value['note'] . '&nbsp;</td>
	<td>' . $value['amount'] . '&nbsp;</td>
	<td>' . $value['rate'] . '&nbsp;</td>
	</tr>
	';
}

echo '</table>';
}
?>

[Lemonboi]

Thanks for the help so far.

What though does confuse me because I don't really understand what is going on with the

foreach ($_POST as $key => $value)

I understand that for each element of the array sotre as temporey element $key but what's the => $value ?

However, it's worked well, yet the one thing I can't work out now is that I need to take the info posted and sort them into an order of rate SORT_DESC and then post the table, and after that I need to submit the values to a database. It'd bee cool if you could explain what's goin on so that I i learn and don't have to pester anyone again 😉 😃

[bradgrafelman]

With that foreach statement, you're going through each element in $_POST and creating a new variable, with the key as the variable name, and the value of that key as the new variables value.

i.e. $_POST['firstName'] = "Bob"; is now $firstName = "Bob";

[Lemonboi]

So in this case
$key = '1'
$key='2'
and so on down the line