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I have been looking for a couple of days for a filter for the WordPress gallery. I have tried many different codes but nothing seems to work for it. I am not using a plugin. I am talking about the stock gallery

I created a 2 column WordPress gallery and inserted it into a page. This did make a 2 column gallery but it also made the image sizes to 128 x 49. The site is responsive and the image sizes should be around 400 by 200. So I thought that if I could get WordPress to take out the inline height and width that the responsive part would take over and fill the available space. The filters that I have tried have worked on other images just not the gallery. I am using the 2014 theme and it's media queries. Is there a specific filter for the gallery?

Here is the filter I am using for other images

 add_filter('wp_get_attachment_link', 'remove_img_width_height', 10, 1);

function remove_img_width_height($html) {
    $html = preg_replace( '/(width|height)=\"\d*\"\s/', "", $html );
    return $html;
}
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    Possible duplicate of 4343
    – helgatheviking
    Commented Mar 26, 2014 at 21:47
  • It's not a duplicate. That post is talking about a plugin using shortcodes and limiting the amount of images posted. I tried the filter in that post and it didn't work.
    – Jamie
    Commented Mar 26, 2014 at 22:44
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    You asked for a way to filter the WordPress gallery. post_gallery is that filter. You might need to adapt the specific filter to your purposes, but that's the right place to start.
    – helgatheviking
    Commented Mar 26, 2014 at 22:59
  • @helgatheviking You should just mark it in a close vote, so we can inspect it. Thanks :)
    – kaiser
    Commented Mar 27, 2014 at 0:03
  • Removing the inline tags will probably not help. CSS cam override those.
    – s_ha_dum
    Commented Mar 27, 2014 at 0:13

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As an alternative to removing the image sizes (which digging a little deeper looks very complicated), why not change the size of the images in your gallery? If you use a larger image they will "fill the space" at larger screens and then shrink down for smaller screens.

The Gallery shortcode has a size parameter (with thumbnail as the default)... that is weirdly not available in the media library, but can be entered in the HTML editor. 

[gallery link="none" ids="94,92,85" size="medium"]
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