help with array for last field in php or codeigniter - php

Question

I have been on this for a day now and still cant solve it though it should be quite simple. I have a php code.
foreach($cart as $line=>$item)
{
echo form_open("sales/edit_item/$line");
?>
<td style="align:center;"><?php echo $item['name']; ?></td>
<?php if ($items_module_allowed)
{
?>
<td><?php echo form_input(array('name'=>'price','value'=>$item['price'],'size'=>'6'));?></td>
<?php
}
else
{
?>
<td><?php echo $item['price']; ?></td>
<?php echo form_hidden('price',$item['price']); ?>
<?php
}
?>
<td>
<?php
if($item['is_serialized']==1)
{
echo $item['quantity'];
echo form_hidden('quantity',$item['quantity']);
}
else
{
echo form_input(array('name'=>'quantity','value'=>$item['quantity'],'size'=>'2'));
}
?>
</td>
</div></div>
<td><?php echo to_currency($item['price']*$item['quantity']-$item['price']*$item['quantity']*$item['discount']/100); ?></td>
<?php
if($item['allow_alt_description']==1)
{
}
else
{
if ($item['description']!='')
{
}
else
{
}
}
?>
</td>
<td> </td>
<td style="color:#2F4F4F";>
<?php
if($item['is_serialized']==1)
{
}
?>
</td>
<td colspan=3 style="text-align:left;">
<?php
if($item['is_serialized']==1)
{
}
?>
</td>
</tr>
<tr style="height:3px">
<td colspan=8 style="background-color:white"> </td>
</tr> </form>
<?php
}
}
?>
This creates fields with relevant data and works ok. I just need to get the last field and echo it, I have tried everything and it still loops through the array, or does not work. This might be simple to someone else but it has confused me for a day now.

Answer 1

When you use a loop, such as for or foreach or while, it will iterate over every single child element of the array until it reaches the end. You don't need to loop, you simply need to access the last member of the array, like so:
$lastLine = end( array_keys($cart) );
echo form_open("sales/edit_item/{$lastLine}");
Edit: Now that I understand a bit better:
$lastItem = array_slice($cart, -1, null, true);
$line = key($lastItem);
$item = reset($lastItem);
echo form_open("sales/edit_item/{$line}");
?>
<!-- do all your html-ish stuff here. -->