Add data attribute to wp_nav_menu

I have the following code:

$nav_menu_args = array('fallback_cb' => '','menu' => 'menu', 'menu_class' => 'menu_class');

$x = wp_nav_menu( apply_filters( 'widget_nav_menu_args', $nav_menu_args, 'menu', $args ) );

$pattern = '#<ul([^>]*)>#i'; 

$replacement = '<ul$1 data-attr="abc">';  // this is a wrong

echo preg_replace( $pattern, $replacement, $x );

      

I am trying to add data-attr

in ul

by changing the template and without making changes through Walker_Nav_Menu

.

What I want to do is have the following list:

<ul class="menu_class" data-attr="abc">
  <li><li>
  <li>
    <ul>
      <li></li>
    </ul>
  <li>
</ul>

      

But I am getting also data-attr

on my inner ul like this.

<ul class="menu_class" data-attr="abc">
  <li><li>
  <li>
    <ul data-attr="abc">
      <li></li>
    </ul>
  <li>
</ul>

      

What am I missing?

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1 answer


You can add the number of objects you want to replace, so only the first one is required ul

.

echo preg_replace( $pattern, $replacement, $x, 1 ); // 1 at the end to replace only the first occurence

      



Or just change the key items_wrap to wp_nav_menu.

$nav_menu_args = array('fallback_cb' => '','menu' => 'menu', 'items_wrap' => '<ul class="menu_class" data-attr="abc">%3$s</ul>');

      

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