What are some common pitfalls when trying to display images using the_post_thumbnail_url in PHP?

When using the_post_thumbnail_url in PHP to display images, a common pitfall is not checking if the post has a thumbnail set before trying to display it. To avoid errors, you should first check if the post has a thumbnail using has_post_thumbnail(). If the post has a thumbnail, you can then safely display it using the_post_thumbnail_url(). 

<?php
if ( has_post_thumbnail() ) {
    $thumbnail_url = the_post_thumbnail_url();
    echo '<img src="' . $thumbnail_url . '" alt="Thumbnail">';
} else {
    echo 'No thumbnail available';
}
?>

Keywords

the_post_thumbnail_url PHP display images pitfalls troubleshooting

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