Tryign to find out how to create Unique Form Codes for each car similar to what is on this page. I want to however pregenerate them and include them on their respective car pages. Do you have any idea to how i could do that?

gistfile1.txt

<?php
defined('_JEXEC') or die('Restricted access');

JHTML::_('behavior.tooltip');

$reserve = $this->reserve;
//dd($reserve);
?>
<div id="djrenacar">
<div id="djrac_steps">
	<div class="step">
		<div class="step-in">
			<div class="step_title"><span>1</span>Your Intinerary</div>
			<a class="edit_link" href="<?php echo JRoute::_(DJRentacarHelperRoute::getLink('form')) ?>">Change Itinerary</a>
			<div class="pickup_return">
				<strong class="step_subtitle red">PICK UP</strong><br/>
				<?php echo $reserve['pickup_location'] ?><br/>
				<strong>Date:</strong> <?php echo $reserve['pickup_date'] ?><br/>
				<strong>Time:</strong> <span class="step_time"><?php echo $reserve['pickup_time'] ?></span>
			</div>
			<div class="pickup_return">
				<strong class="step_subtitle red">RETURN</strong><br/>
				<?php echo $reserve['return_location'] ?><br/>
				<strong>Date:</strong> <?php echo $reserve['return_date'] ?><br/>
				<strong>Time:</strong> <span class="step_time"><?php echo $reserve['return_time'] ?></span>
			</div>
			<div style="clear:both;"></div>
		</div>
	</div>
	<div class="step current_step">
		<?php if(isset($reserve['car'])) { ?>
		<div class="step-in" style="background-image: url(<?php echo JURI::root(true).'/images/stories/'.str_ireplace('.jpg','.png', $reserve['car']->image);?>); background-repeat: no-repeat; background-position: 100% 60px; background-size: 210px;">
			<div class="step_title"><span>2</span>Select Your Vehicle/Add-ons</div>
			<div class="step_subtitle" style="margin-top: -4px;"><strong class="red">Vehicle:</strong> <?php echo $reserve['car']->model ?></div>
			<div class="step_subtitle" style="margin-top: -6px;"><strong class="red">Rate:</strong> $<?php echo (isset($reserve['car']->discount) ? number_format((1-$reserve['car']->discount)*$reserve['car']->rate,2) : $reserve['car']->rate) .'/'. ucfirst(strtolower($reserve['car']->plan)) ?></div>
		</div>
		<?php } else { ?>
		<div class="step-in">
			<div class="step_title"><span>2</span>Select Your Vehicle/Add-ons</div>
		</div>
		<?php }	?>
	</div>
	<div class="step">
		<div class="step-in">
			<div class="step_title"><span>3</span>Reserve Your Vehicle</div>
		</div>
	</div>
	<div style="clear:both;"></div>
</div>

<?php if($reserve['rn']) { ?>
	<h1 class="djtitle">You are currently modifying reservation # <?php echo $reserve['rn'] ?></h1>
<?php } ?>

<div class="cars">
<div class="top">
	
	<div class="discounts_form">
		<form name="discounts" action="<?php echo JRoute::_(DJRentacarHelperRoute::getLink('show')); ?>" method="post" autocomplete="off">
			<?php if(isset($reserve['discount_code'])) { ?>
				<label for="discount" style="margin: 0 15px 0 5px;">Discount Code: <?php echo $reserve['discount_code'] ?></label>
				<input type="hidden" id="discount" name="remove" value="discount" class="inputbox" autocomplete="off" />
				<input type="submit" class="button_small" value="Remove" />
			<?php } else if(isset($reserve['corporate_name'])) { ?>
				<label for="corporate" style="margin: 0 15px 0 5px;">Corporate Code: <?php echo $reserve['corporate_code'] . ' (' . $reserve['corporate_name'] . ')' ?></label>
				<input type="hidden" id="corporate" name="remove" value="corporate" class="inputbox" autocomplete="off" />
				<input type="submit" class="button_small" value="Remove" />
			<?php } else { ?>
				<label for="corporate">Corporate Code</label>
				<input type="text" id="corporate" name="corporate" value="<?php echo $reserve['corporate_code'] ?>" class="inputbox" autocomplete="off" />
				<input type="submit" class="button_small" value="Submit" />
				<span class="discounts_sep"></span>
				<label for="discount">Discount Code</label>
				<input type="text" id="discount" name="discount" value="<?php echo $reserve['discount_code'] ?>" class="inputbox" autocomplete="off" />
				<input type="submit" class="button_small" value="Submit" />
			<?php } ?>
		</form>
	</div>
	<h2 class="djtitle">All Vehicles</h2>
</div>
<?php

foreach($this->items as $i){
	if($reserve['age']==1 && $i->age>24){
		continue;
	}
	if($reserve['type']){
		if(!strstr($i->notes,$reserve['type'])){
			continue;
		}
	}
	if(!$i->id){
		continue;
	} ?>
	<div class="vehicle_row">
		<div class="vehicle_row_in gbox">
			<div class="vehicle_row_in2 clearfix">
				<div class="model"><?php echo $i->model; ?>
					<img src="<?php echo JURI::root(true).'/images/stories/'.str_ireplace('.jpg','.png', $i->image) ?>" alt="<?php echo $i->model ?>" />
				</div>
				<div class="features">
					<div class="subtitle">Vehicle Features</div>
					<div class="ficons">
						<span class="psg hasTip" title="Passengers"><?php echo (isset($i->Passengers) ? $i->Passengers : '-') ?></span>
						<span class="bag hasTip" title="Luggage capacity"><?php echo (isset($i->Luggage) ? $i->Luggage : '-') ?></span>
						<span class="mpg hasTip" title="Miles per gallon::City/Highway"><?php echo (isset($i->MPGCity) ? $i->MPGCity : '-') ?>/<?php echo (isset($i->MPGHighway) ? $i->MPGHighway : '-') ?></span>
					</div>
					<?php 
					if(isset($i->notes)) {
						$features = explode('|', $i->notes); ?>
						<ul>
						<?php foreach($features as $feature) { ?>
							<li><?php echo $feature; ?></li>
						<?php } ?>
						</ul>
					<?php } else { echo $i->desc; } ?>
				</div>
				<div class="rate_quote">
					<div class="subtitle">California rate quote</div>
					INCLUDES
					<ul>
						<li>Miles Per Day: <?php echo $i->ExtraDayFreeMiles ?></li>
						<li>Extra Mileage Rate: $<?php echo $i->PerMileAmount ?></li>
						
						<?php if(isset($i->discount)) { ?><li>Discount: <?php echo 100 * $i->discount ?>%</li><?php } ?>
					</ul>
				</div>
				<div class="rates">
					<div class="subtitle">Rates</div>
					<strong style="font-size: 14px;">Book Now Rate:</strong>
					<div class="price">$<?php echo (isset($i->discount) ? number_format((1-$i->discount)*$i->rate,2) : $i->rate) .'/'. ucfirst(strtolower($i->plan)) ?></div>
					<form action="<?php echo JRoute::_(DJRentacarHelperRoute::getLink('details')); ?>" method="post">
						<input name="car" type="hidden" value="<?php echo $i->code ?>" />
						<input type="submit" class="button" value="Select car" />
					</form>
				</div>
				<div style="clear:both"></div>
			</div>
		</div>
	</div>
<?php } 
?>
<div style="clear:both"></div>
</div>
</div>