Question

In the script below, I’m getting an invalid arguments error on the “echo implode()” line:

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

Here is the script:

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

How might I rework this to catch the invalid argument?

Answer 1

Initialise $ret as an array before your foreach loop.

$ret = array();
$tags = get_tags();
foreach ($tags as $tag){
   $ret[]= $tag->name; 
} 
echo implode(', ', $ret); 

Then, if get_tags() doesn’t return anything, $ret is still being passed into implode as an array (but as an empty array) rather than as a null