apply_filters( ‘post_thumbnail_size’, string|int[] $size, int $post_id )

Filters the post thumbnail size.

Parameters

$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).
$post_idint: The post ID.

$size = apply_filters( 'post_thumbnail_size', $size, $post->ID );

Used by	Description
get_the_post_thumbnail()`wp-includes/post-thumbnail-template.php`	Retrieves the post thumbnail.

Version	Description
4.9.0	Added the `$post_id` parameter.
2.9.0	Introduced.

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