The Image Widget includes width and height on the images which I've unsuccessfully have been trying to filter out so I can have fluid width.

I've tried the following, which seems to be the most common solutions for similar problems, in functions.php, but without success:

function responsive_image_widget( $attr = array() ) {
    return $attr;
add_filter( 'image_widget_image_attributes', 'responsive_image_widget' );


function responsive_image_widget($html) {
  $html = preg_replace('/(width|height)=["\']\d*["\']\s?/', "", $html);
    return $html;
add_filter('image_widget_image_attributes','responsive_image_widget', 10);

Here is a link for the Image Widget's filter documentation.

Any help is much appreciated!

2 Answers 2


It is not possible to remove it from attribute filter. When rendering image, plugin is doing as below.

$output .= rtrim("<img $hwstring");
foreach ( $attr as $name => $value ) {
  $output .= sprintf( ' %s="%s"', $name, $value );
$output .= ' />';

It is attaching width and height string beforehand and only applying attribute. Sad thing is that width and height is not kept in attribute filter.

** I am not sure this should be posted as answer. I posted here because I could not comment in your question.**

  • Thanks for the explanation. I worked around it by removing it using jQuery.
    – Eystein
    Commented Jun 13, 2014 at 14:44

Have you tried targeting the width and height filters directly?

(from the plugin code)

   $instance['width'] = apply_filters( 'image_widget_image_width', abs( $instance['width'] ), $args, $instance );
    $instance['height'] = apply_filters( 'image_widget_image_height', abs( $instance['height'] ), $args, $instance );

To use your code as an example:

function responsive_image_widget( $currentWidth ) {

   $currentWidth = '';
   return $currentWidth;

add_filter('image_widget_image_width', 'responsive_image_widget' );     
  • Thank you, but unfortunately this didn't work for me. I "solved" it by removing them with jQuery.
    – Eystein
    Commented Jun 13, 2014 at 14:43
  • Ha! That was my next suggestion. :-)
    – leromt
    Commented Jun 13, 2014 at 15:47

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