You can use isset() function to check if it has a value.
In your case you can do like this :
$width = get_post_meta( $post->ID, 'iswidth', true );
if( isset( $width ) ){
echo "<li>Width (px): ".$width."</li>";
}
You can use isset() function to check if it has a value.
In your case you can do like this :
$width = get_post_meta( $post->ID, 'iswidth', true );
if( isset( $width ) ){
echo "<li>Width (px): ".$width."</li>";
}