Filters the post thumbnail HTML.

Parameters

$htmlstring

The post thumbnail HTML.

$post_idint

The post ID.

$post_thumbnail_idint

The post thumbnail ID, or 0 if there isn’t one.

$sizestring|int[]

Requested image size. Can be any registered image size name, or an array of width and height values in pixels (in that order).

$attrstring|array

Query string or array of attributes.

Source

return apply_filters( 'post_thumbnail_html', $html, $post->ID, $post_thumbnail_id, $size, $attr );

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