I want caching all images on my site and prevent the browser download the images all times, so I would like add an version query tag to all images (for example:
?v=20160505
)
How can I add this for image urls?
Now I use this code to show images in my theme:
echo get_the_post_thumbnail( $thumbnail->ID, 'thumbnail' );
1 Answer
Don’t know why you want to do it when there’s update_post_thumbnail_cache()
in WordPress and set expire headers on server side. But you can try this in your functions.php
:
add_filter('wp_get_attachment_image_src', function($img, $id, $size, $icon) {
$img[0] = $img[0] . '?v={$some_version}';
return $img;
}, PHP_INT_MAX, 4);