在php中循环表单输入数组

Question

I'm building an app in CodeIgniter. I have an invoice form which uses jQuery to create new line items. The line items are formated as follows:

<input type="text" name="invoice[new_item_attributes][][description]" class="ui-corner-all text invDesc" title="Description" />
<input type="text" name="invoice[new_item_attributes][][qty]" class="ui-corner-all text invQty" title="Qty" />
<input type="text" name="invoice[new_item_attributes][][amount]" class="ui-corner-all text invAmount" title="Amount" onChange="CalculateTotal(this.form)" />
<input type="hidden" name="invoice[new_item_attributes][][rowTotal]" class="row-total-input" />

What I can't work out is how can I loop through multiple line items to store then in a DB called line items.

At the moment i have

foreach ( $_POST['invoice'] as $key => $value)
    {
        $data = array(
            'description'   =>  $value;
                    );
    }   

But I know that can't be write because I need to somehow reference the invoice[new_item_attributes][][description] to store it in description etc...

Any help would be greatly appreciated.

Answer 1

The correct solution will depend on whether you plan on storing scalar values under $_POST['invoice']['new_item_attributes'] or if you plan on making it an array of arrays (in other words, you plan on having multiples of the new_item_attributes.

If you only plan on storing scalar values then you'll first need to change each of the form elements to look like this:

name="inovoice[new_item_attributes][description]"

You'll notice that the empty [] is gone.

And then your loop should look like so:

foreach($_POST['invoice']['new_item_attributes'] as $key => $val) {
    $data = array('description => $value);
}

Otherwise you'll need to use this in your PHP code:

foreach($_POST['invoice']['new_item_attributes'] as $key => $val) {
         $data = array('description' => $val['description']);
}

Or:

foreach($_POST['invoice']['new_item_attributes'] as $key => $val) {
     foreach($val as $sub => $value) {
         $data = array($sub => $value);
     }
}