wp_make_content_images_responsive

	/**
	 * Filters the output of 'wp_calculate_image_sizes()'.
	 *
	 * @since 4.4.0
	 *
	 * @param string       $sizes         A source size value for use in a 'sizes' attribute.
	 * @param array|string $size          Requested size. Image size or array of width and height values
	 *                                    in pixels (in that order).
	 * @param string|null  $image_src     The URL to the image file or null.
	 * @param array|null   $image_meta    The image meta data as returned by wp_get_attachment_metadata() or null.
	 * @param int          $attachment_id Image attachment ID of the original image or 0.
	 */
	return apply_filters( 'wp_calculate_image_sizes', $sizes, $size, $image_src, $image_meta, $attachment_id );
}

/**
 * Determines if the image meta data is for the image source file.
 *
 * The image meta data is retrieved by attachment post ID. In some cases the post IDs may change.
 * For example when the website is exported and imported at another website. Then the
 * attachment post IDs that are in post_content for the exported website may not match
 * the same attachments at the new website.
 *
 * @since 5.5.0
 *
 * @param string $image_location The full path or URI to the image file.
 * @param array  $image_meta     The attachment meta data as returned by 'wp_get_attachment_metadata()'.
 * @param int    $attachment_id  Optional. The image attachment ID. Default 0.
 * @return bool Whether the image meta is for this image file.
 */
function wp_image_file_matches_image_meta( $image_location, $image_meta, $attachment_id = 0 ) {
	$match = false;

	// Ensure the $image_meta is valid.
	if ( isset( $image_meta['file'] ) && strlen( $image_meta['file'] ) > 4 ) {
		// Remove quiery args if image URI.
		list( $image_location ) = explode( '?', $image_location );

		// Check if the relative image path from the image meta is at the end of $image_location.