WP - content cleaner

WP content mass cleaner.php

// cleaner
// credits http://wordpress.stackexchange.com/questions/52097/better-way-to-remove-html-syntax-from-all-content
$tochange = get_posts('post_type=product&numberposts=-1');    
foreach ($tochange as $post):
    setup_postdata($post);

    $changed = array();
    $changed['ID'] = $post->ID;
    $changed['post_content'] = strip_tags($post->post_content, '<img><a>'); // post_excerpt
    print_r($post->ID); 
    echo '<br />';
    $out = wp_update_post($changed);
    echo 'changed:'.$out.'<br />';

    unset($changed);

endforeach;