Exclude Categories from Home page

I am now thinking that the blank echo line is the problem
and it needs something like:

echo '<input type="text" name="excluded_categories" id="excluded_categories" value=">

';

Keith

• This reply was modified 5 years, 8 months ago by keithwjones.

Seems to function with this instead of the blank echo.

echo '<input type="text" name="excluded_categories" id="excluded_categories">

';

Keith

Right the code is now amended and appears to work:

/* CLASS CATEGORY EXCLUDE FROM HOME and paged pages 
excludes selected categories from main loop on the blog home page
controlled by text input under dashboard->settings->reading -> 'Exclude Categories from Home'  */

class custom_exclude_categories {
    public function custom_exclude_categories() {
        $this->__construct();
    }
    public function __construct() {
        add_action('admin_init',array($this,'register_setting'),10,0);
        add_action('admin_menu', array($this,'admin_option_setup'),10,0);
        add_action('pre_get_posts',array($this,'pre_get_posts'),20,1);
    }
    public function register_setting() {
        register_setting('reading','excluded_categories');
    }
    public function admin_option_setup() {
        add_settings_field( 'excluded_categories_field', __('Exclude Categories from Home', 'custom_lang'), array($this,'excluded_categories_field'), 'reading', 'default' );
    }
    public function excluded_categories_field() {
        $value = get_option('excluded_categories');
        echo '<p><input type="text" class="large-text code" id="excluded_categories" name="excluded_categories" value="'. $value .'" /></p>';
        echo '<p class="description">'. __('Enter here comma separated IDs of the categories, if you want them to be excluded from the home page of your blog.','custom_lang') .'</p>';
    }
    public function pre_get_posts(&$query) {
        if (!$query->is_admin && ($query->is_home || ($query->is_feed && !$query->is_category)) && (!isset($query->query_vars['suppress_filters']) || false === $query->query_vars['suppress_filters']) && !$query->is_preview) {
            if(get_option('excluded_categories') != '') {
                $excluded = get_option('excluded_categories');
                $excluded_arr = explode(',',$excluded);
                $query->set('category__not_in', array_map('intval',$excluded_arr));
            }
        }
    }
}
$custom_exclude_categories = new custom_exclude_categories ;
/* END CATEGORY EXCLUDE CLASS */