在html中根据DIV ID设置php变量

I'm trying to find a way to get Div ID values from an included file's html and use them for comparison in a php if statement. I have a page called templates.php which uses a href value to grab a certain template, in this case fullwidth.php Initially, this gets the value from the URL and if it's 1 it loads the full page template, else it loads the half page template. That functionality works fine:

<!-- Get value from href -->
<?php $value = isset($_GET['value']) ? $_GET['value'] : 1;
      if($value == 1){ 
      include 'class/fullWidth.php';
      }else{
        include 'class/halfWidth.php';
      }
?>

Once $value dictates what template to load, I'm trying to set a value $panelType off of the panel Div so I know which panel type to save to my database. For example, on my fullwidth.php page I have one full width panel:

<div class="col-lg-12 fullWidth" id="full">
    <div class="fullContent" style="background-color: white; height: 100%;">

    </div>
</div>

so back on templates.php, I would take the #full as the div ID and use this to set my variable $panelType.

Which is where I add this and try:

<?php $value = isset($_GET['value']) ? $_GET['value'] : 1;
    $panel = $html->find('div[id]'); //including this to pull in DIV IDs
      if($value == 1){ 
          include 'class/fullWidth.php';
              if($panel == 'full'){
                $panelType = 1;
              }// including this block to say if the Div ID is 'full', set $panelType = 1
      }else{
        include 'class/halfWidth.php';
      }
?>

But this breaks the pages and it looks like a general php or formatting error. I'm not sure what exactly I'm doing wrong here, maybe there's a better way to use the div ID I want for the php variable. Eventually I will expand this so I just want to know how I can modify this to just say "If the Div ID is this, set the $panelType to this, etc."

you can just set the $panel inside your fullwidth template like:

$panel = "full";
<div class="col-lg-12 fullWidth" id="full">
    <div class="fullContent" style="background-color: white; height: 100%;">

    </div>
</div>

and then when you load it, the second code you wrote will work ;)

but that only works, if you can set the panel manually? if there can also be other "panel id's" then this will not work and I think you have more then one id's?

if the id will always be full, i dont see why you need to check that?