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Here's a little coding problem for you. The code:

if ($categories) { 

    foreach ($categories as $tag) { 

        $tag_link = get_category_link($tag->term_id); 

        //new line 
        if (isset($instance['new-line'])) { 
            $html .= "<div>"; 
        } 

        $html .= "<span class="tagsy-box" style="$box_style">"; 
        $html .= "<a href="{$tag_link}" title="{$tag->name} Tag" class="{$tag->slug}"><span class="tagsy-name-$style $theme_name" style="$name_style">"; 
        $html .= "{$tag->name}</span><span class="tagsy-count-$style $theme_count" style="$count_style">{$tag->count}</span></a></span>"; 

        //new line 
        if (isset($instance['new-line'])) { 
            $html .= "</div>"; } } 
        } 
        else { 
            $html .= "No Categories Available"; 
        }

    }

}

The problem: I want to exclude certain categories from displaying. Apparently, the way to do this is to skip the foreach loop for those categories I want to exclude. Unfortunately, I have no idea how to do this. Help much appreciated.

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3
  • Please show the code that populates $categories Commented Aug 9, 2013 at 20:11
  • Also, I'm assuming your code is spread over several lines and not mostly commented out as it is now, so please reformat it. Lines such as $html .= "<span class="tagsy-box" style="$box_style">"; will throw errors, as you are nesting unescaped double quotes. Commented Aug 9, 2013 at 20:18
  • Here's the whole file: pastebin.com/rixJp07d Relevant bit starts at line 197 (I think). Commented Aug 9, 2013 at 20:35

2 Answers 2

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2

In line 195 you're using get_categories, which can be filtered to exclude specific category numbers, either through an array of arguments, or a query string. Since $options is already set, you could add to it before you call get_categories:

if ($show_assigned_categories == 'true' && is_single()) {
        $categories = get_the_category();
} 
else {
    $options['exclude'] = '1,2,3'; // your comma-separated list goes here
    $categories = get_categories($options);
}
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6
  • I tried this but it broke my site. All that would load is a white screen... Commented Aug 9, 2013 at 23:37
  • Hmm. What values did you use for $options['exclude']? Commented Aug 10, 2013 at 1:42
  • I tried '1, 48' Commented Aug 10, 2013 at 12:26
  • 1
    A white screen means PHP ran into a a fatal error. You can often see the error in the browser by activating WordPress Debug. Do not leave it activated on a production site. Commented Aug 10, 2013 at 15:33
  • I don't know if it'll make a difference, but try removing the space between the comma and the 4. None of the examples I see online have one in there. Commented Aug 12, 2013 at 15:06
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To exclude categories you can try this code.

$categories = get_categories();    
$category_to_exclude = array(1,2,3);

if ($categories) {
    foreach ($categories as $tag) {
        if( !in_array($tag->term_id, $category_to_exclude) ) {
            $tag_link = get_category_link($tag->term_id);
            echo $tag_link;
        }
    }
}

The in_array php function will check the current foreach loop $tag->term_id is exists in $category_to_exclude variable. If it not exist, the looping will continue. If it exist, statement will be false and skip the category id.

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2
  • Please add an explanation to your answer: why could that solve the problem? Commented Aug 10, 2013 at 9:11
  • Explained, hope it helps. Commented Aug 10, 2013 at 9:30

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