未定义的变量 - 如何修复？

Question

This is the code I have:

in the php file:

if($special>0){
    $lease_price = (($special/1000)*38);
} else {
    $lease_price = (($price/1000)*38);
}
$lease_price = $this->currency->format($lease_price);

and in the front end tpl file:

<p>
   <i class="fa fa-chevron-down"></i>
   <b>Lease To Buy Price:</b>
   <span><?php if($price>500){ ?>
       <?php echo $lease_price; ?>
   <?php } else { echo 'NA'; } ?></span>                     
</p>

At the moment I'm getting this issue after var dump: Notice: Undefined variable: lease_price in /var/www/framec.co.uk/catalog/view/theme/lexus_superstore/template/product/product.tpl on line 160NULL

Here's a link to a pastebin of my php file http://pastebin.com/bTPtvgUQ

What do I need to add to make this work? Do I need some sort of code like this?:

'type' => $option['type'],

Here's a link to the page this is on http://www.framec.co.uk/index.php?route=product/product&path=59_78&product_id=45

Answer 1

There are two ways to handle this.

Initialise it:

So it's defined and PHP won't return an error when you try to use it.

$lease_price = '';

if($special>0){
    $lease_price = (($special/1000)*38);
} else {
    $lease_price = (($price/1000)*38);
}
$lease_price = $this->currency->format($lease_price);

Don't use it if not set:

Your code which tries to access the undefined variable won't be accessed if it's not defined.

if ( isset($lease_price) ) {

    if($special>0){
      $lease_price = (($special/1000)*38);
    } else {
      $lease_price = (($price/1000)*38);
    }
  $lease_price = $this->currency->format($lease_price);
}