The best thing I liked about the new v3.5 media manager was being able to insert images to a post hosted by an external site like photobucket using "Insert from URL". I normally format my image inserts manually and was hoping "Insert from URL" would reduce some of my work.

Unfortunately I can't add anything to the img src tag that is generated. Specifically I use the alignright class alot but this is ignored in the RSS feed so if I republish my blog post on a non-wordpress powered site the images aren't floated. I want to add an extra style="float:XXX" to the code that is sent to the editor to cover that issue.

If $align is 'right' then it outputs float:right and so on.

I am doing this as a personal plugin and I got it activated but it doesn't output anything when I use "Insert from URL"

I've searched all these help sites and really haven't found anything exactly as I need and my experience level with PHP and wordpress is kind of low (I understand the concepts but have trouble with the syntax)

The closest I got was this previous question: Need help building a filter to edit the output of “image_send_to_editor”

Here is the function I have so far and any hints or tips on what I am doing wrong will help me.

add_filter('image_send_to_editor', 'dlb_filter_fl',10,8);

function dlb_filter_fl ($html, $id, $caption, $title, $align, $url, $size, $alt) {

if ($align == 'right');
     $html = '<img src="' . $url .  '" class="' . $align . '" style="float:right" />';

return $html;

I could be using the wrong filter. I'm not sure. Right now the code is active and get no fatal errors but it doesn't add anything to my img scr tag.

1 Answer 1


I can't find the proper hook, but there is alternative solution: to add style="float:right" to all images in content, which have class="alignright":

add_filter('the_content', 'my_add_image_float_right');

function my_add_image_float_right($content) {
    $pattern = '@(<img.+)(alignright)(.*)(/>)@Ui';
    $replacement = '$1$2$3 style="float:right" />';
    $content = preg_replace($pattern, $replacement, $content);
    return $content;
  • Thanks for the help. Not quite what I wanted to do but gives me something else to think about
    – Doug B.
    Commented Feb 8, 2013 at 3:38

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