the_post_thumbnail() How to remove sizes in img?

Question

Bootstrap

Salute colleagues. I made a WordPress theme based on bootstrap. Now I stick a "thumbnail" from the post into the div with the thumbnail class using the_post_thumbnail().
Problem: in ie8 the image is stretched in height. I found out that if you remove the width and height parameters in img, the glitch disappears. How to display an image without these attributes? I try:
$def_attr = array(
'width' => '',
'height' => '',
);
the_post_thumbnail('thumbnail', $def_attr);

Zero effect :( How to win?

Answer 1

And will it work?

if (has_post_thumbnail()) {
    $thumb = wp_get_attachment_image_src(get_post_thumbnail_id(), 'thumbnail');
  
    $thumb_alt = trim(strip_tags( $attachment->post_excerpt ));
    $thumb_title = trim(strip_tags( $attachment->post_title ));
  
    echo '<img src="'.$thumb[0].'" alt="'.$thumb_alt.'" title="'.$thumb_title.'" />';
}

Answer 2

You can also insert into functions.php

function true_thumbnail_url_only( $html ){
  return preg_replace('#.*src="([^\"]+)".*#', '\1', $html );
}
add_filter('post_thumbnail_html', 'true_thumbnail_url_only', 10, 5);

As a result, when called,
only a link to the thumbnail will be displayed.

Answer 3

If you know the width and height of the image, it's better to specify them.
Beat IE8 with CSS.

Answer 4

If I remember correctly, it will not work without them, because they are set depending on the first argument, and the second argument can be set just class, title, etc.
So as noted above, try to win with css.

Answer 5

Made:

$def_attr = array('class' => 'fixtmb',);
the_post_thumbnail('thumbnail', $def_attr);

Zero effect

Answer 6

can they be removed? Thumb types are defined in functions.php. name of the type and its dimensions,?

Answer 7

Can you plz tell me
how to display a thumbnail, knowing the post ID?
I want to display multiple thumbnails for certain posts.

Answer 8

Gentlemen, please tell me, is it possible to optimize this query somehow?

$thumb = wp_get_attachment_image_src(get_post_thumbnail_id(), 'thumbnail');

otherwise this joy generates a cloud of requests. Or the thumbnail output for each post will still generate 1 request at a time.

Answer 9

Problem solved by replacing

wp_get_attachment_image_src . 'на' . the_post_thumbnail

, now for each post on the page, a separate request is not generated. The performance remains the same.

Answer 10

To remove the width and height attributes from the_post_thumbnail(), you need to insert the following code in functions.php -
add_filter ('post_thumbnail_html','no_width_height_html',10,1);
function no_width_height_html($html){
$pos = strpos($html,'src');
$html='