You don’t need to make arrays for the various elements so much as change the ones that come through the filter.
There are several filters during the form building process. The one I mentioned, wpmem_register_form_rows has all of the fields pieces (the other pieces being various default tags, the hidden fields, and the buttons). All of the fields that you have in the plugins fields tab will be passed to this filter as a multi-dimensional array.
If you have 10 fields in the fields tab, you are going to see an array of 11 fields (the ones you have in the fields tab plus username) where the array key is the option name from the fields tab (the meta key the field will be stored as).
Each of these elements is an array of pieces used for constructing the form. So the defaults you see in the documentation are an example of what you will see for each field:
[option_name] => Array (
[order] => 1
[meta] => option_name
[type] => text
[value] =>
[row_before] =>
[label] => <label for="option_name" class="text">Field Label</label>
[field_before] => <div class="div_text">
[field] => <input name="option_name" type="text" id="option_name" value="" class="textbox" />
[field_after] => </div>
[row_after] =>
)
Order, meta, type, and value are there mainly as values to tell you things that you might need easily in programmatically manipulating the form, but changing them doesn’t really do anything. row_before & and row_after are wrappers if you need to insert some custom span or div. field_before & field_after are a wrapper for the input tag (mostly a legacy tag from when there was a CSS background color behind the form field). Label and field are the html for the label and field inupt tags.
Probably the best way to get a handle on what you have to work with is to add this function to your functions.php file to dump the array so you can see what’s in it:
add_filter( 'wpmem_register_form_rows', function($rows){
echo '<pre>';print_r();echo '</pre>';
return $rows;
});
Based on what you described, you need to manipulate the way things are put together in the array based on how you want the fields to display (since you want multiple fields on a row).
For example, if you just wanted to take the inputs for state and zip and put them on the same line as the city input tag (so it goes city state zip), using the default fields in the plugin’s fields, you could put together a filter like this:
add_filter( 'wpmem_register_form_rows', function($rows){
// take the input tags from default state and zip fields
// and put them into the same line as city
$rows['city']['field'] = $rows['city']['field'] . $rows['thestate']['field'] . $rows['zip']['field'];
// remove the state and zip array elements
unset $rows['thestate'];
unset $rows['zip'];
return $rows;
});
This would put the input tags for those fields with the city so they are altogether.
Obviously, you need to handle additional layout tags and/or CSS as well, but this should give some idea of how it works.
