PHP递归函数问题。

Question

I am having a php recursive function to display my categories with sub, sub-sub category.

Its look like below:

function displayList(&$cats, $parent, $current=0, $level=0) {
  if ($parent==0) {
    foreach ($cats[$parent] as $id=>$nm) {
        displayList($cats, $id, $current);
    }
  }
  else {
    echo "<ul>
";        
    foreach ($cats[$parent] as $id=>$nm) {
      $sel = $current==$id ? ' active' : '';        

      //$indent = str_repeat('&ndash; ', $level);
      echo "<li><a href='' class='$sel'>$nm</a>
";
      if (isset($cats[$id])) {
          displayList($cats, $id, $current, $level+1);  //increment level
      }
      echo '</li>';
    }
    echo "</ul>
";
  }  
}

Here I want to add a CSS class for each parent <li>, if it has a sub, sub-sub categories.

My HTML is something like this:

<ul>
  <li><a href="product_category.html">Party Balloons</a></li>
  <li><a href="">Party Tableware</a></li>
  <li class="parent"><a href="">Party Decorations</a>
  <ul>
    <li><a href="">Lorem ipsum dolor sit amet </a></li>
    <li class="parent"><a href="">Conse ctetur adipisicing </a>
      <ul>
        <li><a href="">Dolore magna aliqua</a></li>
        <li><a href="">Ut labore et </a></li>
      </ul>
    </li>
    <li><a href="">Elit sed do eiusmod tempor</a></li>
    <li><a href="">Incididunt ut labor</a></li>
  </ul>
  </li>
  <li><a href="">Party Banners</a></li>
</ul>

Can anybody tell me how can I do it? Thanks in advance.

Answer 1

This probably does not address your question accurately (not using PHP), but you can consider using jQuery:

$("li").filter(function(){
    return $(this).find("li").length > 0; // counts children with <li> recursively
}).addClass("has-sublist");