wp_get_attachment_image_srcset( int $attachment_id, string|int[] $size = 'medium', array|null $image_meta = null ): string|false

Source

			absint( $image_meta['sizes'][ $size_name ]['height'] ),
		);
	}

	return false;
}

/**
 * Retrieves the value for an image attachment's 'srcset' attribute.
 *
 * @since 4.4.0
 *
 * @see wp_calculate_image_srcset()
 *
 * @param int          $attachment_id Image attachment ID.
 * @param string|int[] $size          Optional. Image size. Accepts any registered image size name, or an array of
 *                                    width and height values in pixels (in that order). Default 'medium'.
 * @param array|null   $image_meta    Optional. The image meta data as returned by 'wp_get_attachment_metadata()'.
 *                                    Default null.

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