Saving arrays with key/value pairs

Unable to save arrays with the correct key based on how many inputs the user selects.

I have tried the following:

I've tried to json encode some elements, but to no avail.

Here's the html:

<div class="row">
    <div class="col">
        <div class="form-group">
            <label>Block Name</label>
            <input type="text" name="name_of_blocks[]" class="form-control">
        </div>
    </div>
    <div class="col">
        <label>No of units in the block</label>
        <input type="number" name="no_units[]" class="form-control" id="blockNo">
    </div>
    <div class="col">
        <label>Number of floors</label>
        <input type="number" class="form-control" name="no_of_floors[]">
    </div>
    <div class="col">
        <label>Does this block have a lift?</label>
        <select class="form-control" name="lift[]">
            <option>Please Select</option>
            <option value="yes">Yes</option>
            <option value="no">No</option>
        </select>
    </div>
</div>

<div class="row">
    <div class="col">
        <label>What facilities does this block have?</label>
        <div class="row">
            <div class="col">
                <ul class="list-unstyled">
                    <li><input type="checkbox" name="facilities[]" value="fob"> Fob Entry</li>
                    <li><input type="checkbox" name="facilities[]" value="gate_entry"> Gate Entry</li>
                    <li><input type="checkbox" name="facilities[]" value="key"> Key Entry</li>
                    <li><input type="checkbox" name="facilities[]" value="finger"> Fingerprint Entry</li>
                    <li><input type="checkbox" name="facilities[]" value="Code Entry"> Code Entry</li>
                    <li><input type="checkbox" name="facilities[]" value="mailbox"> Mailbox Area</li>
                </ul>
            </div>
            <div class="col">
                <ul class="list-unstyled">
                    <li><input type="checkbox" name="facilities[]" value="bar"> Bar</li>
                    <li><input type="checkbox" name="facilities[]" value="bike_storage"> Bike Storage</li>
                    <li><input type="checkbox" name="facilities[]" value="car_park"> Secure Car Parking</li>
                    <li><input type="checkbox" name="facilities[]" value="off_road"> Off-road Parking</li>
                    <li><input type="checkbox" name="facilities[]" value="visitor_parking"> Visitor Parking</li>
                    <li><input type="checkbox" name="facilities[]" value="concierge"> Concierge</li>
                </ul>
            </div>
            <div class="col">
                <ul class="list-unstyled">
                    <li><input type="checkbox" name="facilities[]" value="gym"> Gym</li>
                    <li><input type="checkbox" name="facilities[]" value="pool"> Swimming Pool</li>
                    <li><input type="checkbox" name="facilities[]" value="snooker"> Snooker/Pool Table</li>
                    <li><input type="checkbox" name="facilities[]" value="cafe"> Cafe</li>
                    <li><input type="checkbox" name="facilities[]" value="maintenance"> Maintenance Service</li>
                    <li><input type="checkbox" name="facilities[]" value="various"> Various businesses/commercial
                        outlets
                    </li>
                </ul>
            </div>

Heres what I have in my controller, but this either doesn't save correctly or saves one row if there's two and doesn't save the correct info:

$data = $request->all();
$count = $data['number_of_blocks'];
for ($i = 0; $i < $count; $i++) {

    $fac = array_values($request->facilities);
    $facil = json_encode($fac);

    $blok = new Blocks;
    $blok->block_id = $block->id;
    $blok->name_of_blocks = array_key_exists($i, $data['name_of_blocks']) ? $data['name_of_blocks'][$i] : null;
    $blok->no_units = array_key_exists($i, $data['no_units']) ? $data['no_units'][$i] : null;
    $blok->no_of_floors = array_key_exists($i, $data['no_of_floors']) ? $data['no_of_floors'][$i] : null;
    $blok->lift = array_key_exists($i, $data['lift']) ? $data['lift'][$i] : null;
    $blok->facilities = array_key_exists($i, $facil) ? $facil[$i] : null;
    $blok->save();
}

I do have some clone script to clone the amount of form fields based on how many the user wants, so this could also be a problem, but I'm not sure what or where:

$("#continue").click(function () {
    $("#first").hide();
    $("#second").show();

    var blocks = $("#noBlocks").val();
    var name = $("#blockName").val();
    $(".clone").hide();
    var select = parseInt(blocks, 10);
    var $clone = $('.clone').html();
    var html = '';
    while (select > 0) {
        html += $clone;
        select--;
    }

    $("#area").empty().html(html);

    $("#bno").html(blocks);
    $("#bn").html(name);
});

Basically if the user selects 2 then I want the code to save two rows and the facilities to be json encoded for each row, and match what the user selects. Any help advice greatly appreciated.

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