Warning: implode() [function.implode]: Invalid arguments passed

Question

I'm getting the error below...

Warning: implode() [function.implode]: Invalid arguments passed in \wp-content/themes/mytheme/functions.php on line 1335

at...

function my_get_tags_sitemap(){
    if ( !function_exists('wp_tag_cloud') || get_option('cb2_noposttags')) return;
    $unlinkTags = get_option('cb2_unlinkTags'); 
    echo '<div class="tags"><h2>Tags</h2>';
    if($unlinkTags)
    {
        $tags = get_tags();
        foreach ($tags as $tag){
            $ret[]= $tag->name;
        }
        //ERROR OCCURS HERE
        echo implode(', ', $ret);
    }
    else
    {
        wp_tag_cloud('separator=, &smallest=11&largest=11');
    }
    echo '</div>';
}

Any ideas how to intercept the error. The site has exactly one tag.

Mark Eirich · Accepted Answer · 2011-03-12 01:28:58Z

46

You are getting the error because $ret is not an array.

To get rid of the error, at the start of your function, define it with this line: $ret = array();

It appears that the get_tags() call is returning nothing, so the foreach is not run, which means that $ret isn't defined.

answered Mar 12, 2011 at 1:28

Mark Eirich

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Comments

蔡正海 · Accepted Answer · 2014-01-26 07:44:13Z

37

You can try

echo implode(', ', (array)$ret);

answered Jan 26, 2014 at 7:44

蔡正海

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Andrew Moore · Accepted Answer · 2011-03-12 01:29:14Z

2

It happens when $ret hasn't been defined. The solution is simple. Right above $tags = get_tags();, add the following line:

$ret = array();

answered Mar 12, 2011 at 1:29

Andrew Moore

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Comments

hasnath rumman · Accepted Answer · 2019-12-21 05:58:59Z

-1

function my_get_tags_sitemap(){
    if ( !function_exists('wp_tag_cloud') || get_option('cb2_noposttags')) return;
    $unlinkTags = get_option('cb2_unlinkTags'); 
    echo '<div class="tags"><h2>Tags</h2>';
    $ret = []; // here you need to add array which you call inside implode function
    if($unlinkTags)
    {
        $tags = get_tags();
        foreach ($tags as $tag){
            $ret[]= $tag->name;
        }
        //ERROR OCCURS HERE
        echo implode(', ', $ret);
    }
    else
    {
        wp_tag_cloud('separator=, &smallest=11&largest=11');
    }
    echo '</div>';
}

answered Dec 21, 2019 at 5:58

hasnath rumman

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2 Comments

mjuarez Over a year ago

Can you edit your post to say why this answer is better than the other 4 already posted?

hasnath rumman Over a year ago

Actually I don't argue with you but here I'm trying to mention where to add the array().

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