echo class “active” - if class=“” is already exists or not.

Question

The following PHP function add class="active" to the current page open.

<?php #add class .active to current page
   $directoryURL = $_SERVER['REQUEST_URI'];
   $path = parse_url($directoryURL, PHP_URL_PATH);
   $components = explode('/', $path);
   $currentPage = preg_replace("/\\.[^.\\s]{3,4}$/", "", end($components));

   if ($currentPage == "") {
       $currentPage = "index";
   }

   function href($url) {
      global $currentPage;
      $path = explode('/', $url);
      $page = preg_replace("/\\.[^.\\s]{3,4}$/", "", end($path));
      echo 'href="' . $url . '"';

      if ($page == $currentPage) {
         echo 'active';
      }
   }
?>

Here is the menu items:

<li><a class="icon-glass"<?php href('index.php');?>>Home</a></li>
<li><a <?php href('about.php');?>>About</a></li>

The problem is, that function only works with menu items that has no class="" declared, ie:

<li><a <?php href('about.php');?>>About</a></li>

And it does not work for this one:

<li><a class="icon-glass"<?php href('index.php');?>>Home</a></li>

I believe it is something to do with this part of the script:

if ($page == $currentPage) {
   echo 'class="active"';
}

The question: How do I keep it do what it does now, which is adding class="" when it is not already added, BUT also just add the .active bit inside an already existed class (if found)?

I tried to only use echo 'active'; but that didn't work.

Answer 1

Try this format with existing php code

<li><a class="icon-glass <?php href('index.php');?>">Home</a></li>
<li><a class="<?php href('about.php');?>">About</a></li>

Means you have to echo the class active inside class property double quotes "".

Answer 2

Replace function href with

function href($url) {
    global $currentPage;
    $path = explode('/', $url);
    $page = preg_replace("/\\.[^.\\s]{3,4}$/", "", end($path));

    if ($page == $currentPage) {
        echo ' active " ';
    }else{
        echo ' " ';
    }
    echo ' href="' . $url . '" ';  

}

And this html

<li><a class="icon-glass"<?php href('index.php');?>>Home</a></li>
<li><a <?php href('about.php');?>>About</a></li>

with

<li><a class="icon-glass <?php href('index.php');?>>Home</a></li>
<li><a class="<?php href('about.php');?>>About</a></li>