<?php
  /**
   * Tests if any of a post's assigned categories are descendants of target categories
   *
   * @param int|array $cats The target categories. Integer ID or array of integer IDs
   * @param int|object $_post The post. Omit to test the current post in the Loop or main query
   * @return bool True if at least 1 of the post's categories is a descendant of any of the target categories
   * @see get_term_by() You can get a category by name or slug, then pass ID to this function
   * @uses get_term_children() Passes $cats
   * @uses in_category() Passes $_post (can be empty)
   * @version 2.7
   * @link http://codex.wordpress.org/Function_Reference/in_category#Testing_if_a_post_is_in_a_descendant_category
   */
  if ( ! function_exists( 'post_is_in_descendant_category' ) ) {
	  function post_is_in_descendant_category( $cats, $_post = null ) {
		  foreach ( (array) $cats as $cat ) {
			  // get_term_children() accepts integer ID only
			  $descendants = get_term_children( (int) $cat, 'category' );
			  if ( $descendants && in_category( $descendants, $_post ) )
				  return true;
		  }
		  return false;
	  }
  }
?>

<?php

  $post = $wp_query->post;
  if (in_category( 'cat1' ) || post_is_in_descendant_category( get_term_by('slug','cat1','category') )) {
      include(TEMPLATEPATH.'/single_cat1.php');
  } elseif (in_category( 'cat2' ) || post_is_in_descendant_category( get_term_by('slug','cat2','category') )) {
      include(TEMPLATEPATH.'/single_cat2.php');
  } else {
      include(TEMPLATEPATH.'/single_default.php');
  }
?>

Here’s my code:

post;
if (in_category( ‘cat1′ ) || post_is_in_descendant_category( get_term_by(‘slug’,'cat1′,’category’) )) {
include(TEMPLATEPATH.’/single_cat1.php’);
} elseif (in_category( ‘cat2′ ) || post_is_in_descendant_category( get_term_by(‘slug’,'cat2′,’category’) )) {
include(TEMPLATEPATH.’/single_cat2.php’);
} else {
include(TEMPLATEPATH.’/single_default.php’);
}
?>

Good share sir!! God Bless you!!!

This is actually getting the right template file to open because I’m getting

Fatal error: Call to undefined function get_header() in /home/stacey/public_html/wp-content/themes/Nala-theme/single-cat-humanrants.php on line 10

Why is it telling me that get_header() is undefined? I’ve been messing with it for hours and maybe it is obvious but I guess I’m missing the forest for the trees but I can’t seem to figure it out.

If I replace single.php with it’s orginal code, including the call to get_header() it will go back to the way it was before.

Any help would be apprectiated,
Thanks