BP_Media_Extractor::extract_images( string $richtext, string $plaintext, array $extra_args = array() )

	protected function extract_images( $richtext, $plaintext, $extra_args = array() ) {
		$media = array( 'has' => array( 'images' => 0 ), 'images' => array() );

		$featured_image = $this->extract_images_from_featured_images( $richtext, $plaintext, $extra_args );
		$galleries      = $this->extract_images_from_galleries( $richtext, $plaintext, $extra_args );


		// `<img src>` tags.
		if ( stripos( $richtext, 'src=' ) !== false ) {
			preg_match_all( '#src=(["\'])([^"\']+)\1#i', $richtext, $img_srcs );  // Matches src="text" and src='text'.

			// <img>.
			if ( ! empty( $img_srcs[2] ) ) {
				$img_srcs[2] = array_unique( $img_srcs[2] );

				foreach ( $img_srcs[2] as $image_src ) {
					// Skip data URIs.
					if ( strtolower( substr( $image_src, 0, 5 ) ) === 'data:' ) {
						continue;
					}

					$image_src = esc_url_raw( $image_src );
					if ( ! $image_src ) {
						continue;
					}

					$media['images'][] = array(
						'source' => 'html',
						'url'    => $image_src,

						// The image resolution isn't available, but we need to set the keys anyway.
						'height' => 0,
						'width'  => 0,
					);
				}
			}
		}

		// Galleries.
		if ( ! empty( $galleries ) ) {
			foreach ( $galleries as $gallery ) {
				foreach ( $gallery as $image ) {
					$image_url = esc_url_raw( $image['url'] );
					if ( ! $image_url ) {
						continue;
					}

					$media['images'][] = array(
						'gallery_id' => $image['gallery_id'],
						'source'     => 'galleries',
						'url'        => $image_url,
						'width'      => $image['width'],
						'height'     => $image['height'],
					);
				}
			}

			$media['has']['galleries'] = count( $galleries );
		}

		// Featured images (aka thumbnails).
		if ( ! empty( $featured_image ) ) {
			$image_url = esc_url_raw( $featured_image[0] );

			if ( $image_url ) {
				$media['images'][] = array(
					'source' => 'featured_images',
					'url'    => $image_url,
					'width'  => $featured_image[1],
					'height' => $featured_image[2],
				);

				$media['has']['featured_images'] = 1;
			}
		}

		// Update image count.
		$media['has']['images'] = count( $media['images'] );


		/**
		 * Filters images extracted from text.
		 *
		 * @since BuddyPress 2.3.0
		 *
		 * @param array  $media      Extracted images. See {@link BP_Media_Extractor::extract_images()} for format.
		 * @param string $richtext   Content to parse.
		 * @param string $plaintext  Copy of $richtext without any markup.
		 * @param array  $extra_args Bespoke data for a particular extractor.
		 */
		return apply_filters( 'bp_media_extractor_images', $media, $richtext, $plaintext, $extra_args );
	}