Question 166354 in Wordpress Question posted in
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warning? How do I resolve the warning while developing a WordPress theme?

Warning is "Invalid argument supplied for foreach()"

<?php
    $tags = get_the_tags();
    foreach($tags as $tag):?>

        <a href="<?php echo get_tag_link($tag->term_id);?>" class="badge badge-success">
            <?php echo $tag->name;?>
        </a>

    <?php endforeach;?>
Tags:

2

Answers


  1. 0

    Check if your $tags variable is an actual array of elements before trying to loop through it all!..

    ie:

    <?php
$tags = get_the_tags(array('hide_empty' => false)); // show all tags, even empty 1s

// debug - uncomment below to view output
/* 
   echo "<pre>";
   print_r($tags);
   echo "</pre>";
*/

if( is_array($tags) )
{
   foreach($tags as $tag):
    ?>
      <a href="<?php echo get_tag_link($tag->term_id);?>" class="badge badge-success">
         <?php echo $tag->name;?>
      </a>
   <?php 
   endforeach; 
}else{
  echo "<p>Not an Array!</p>";
}
?>
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  2. 0

    In general, don’t assume that a variable returned from a function will always be an array, you can check this before calling foreach like this:

    $tags = get_the_tags();
if (is_array($tags) || is_object($tags)) {
    foreach ($tags as $tag) {
        ...
    }
}

    In the specific case of get_the_tags(), this might be enough though:

    $tags = get_the_tags();
if ($tags) {
    foreach ($tags as $tag) {
        ...
    }
}
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