highlighting selected number in pagination

Question

I used the following code in my website to highlight clicked page number, but all numbers are highlighted either with clicking or not. How can I solve that?

          //===================start pagination=========================    
        $jumpForward=3;
        $jumpBackward=3;
        
         
  
  $active=isset($_GET['page'])&&$_GET['page']==$pageNum?'active':'';
        

 ?>
 <nav aria-label="Page navigation example" class="pagination-container">
      <ul class="pagination pagination-lg">

     <?php if( ($pageNum-$jumpBackward)>=1 ){  //previous
     ?> <li class="page-item"><a class="page-link prev" href="?page=<?php echo ($pageNum-$jumpBackward)?>">Previous (-3)</a></li> <?php
      }else{
      ?> <li class="page-item disabled"><a class="page-link">Previous</a></li> <?php
      }
   
  for ($page=max(1,$pageNum-5);$page<=min($pageNum+2,$NumberOfPages);$page++) {  //for loop
    echo '<li class="page-item '.$active.'"><a class="page-link" href="search.php?scat='.$scat.'&c='.$count.'&i='.$catid.'&n='.$catName.'&page='.$page.'">'. $page.'</a></li>';
   }
  
    if(($pageNum+$jumpForward)<=$NumberOfPages ){  //next
    ?> <li class="page-item"> <a class="page-link next"  href="? 
 page=<?php echo ($pageNum+$jumpForward)?>" >Next (+3)</a> </li> <?php
}else{
   ?> <li class="page-item disabled"> <a class="page-link "   >Last</a> </li> <?php
}
 ?>  
    </ul > 
</nav>
<?php
}