wikimedia / mediawiki

		$gis = getimagesize( $file );

		MediaWiki\restoreWarnings();

		if ( $gis && isset( $gis['mime'] ) ) {

			$mime = $gis['mime'];

			wfDebug( __METHOD__ . ": getimagesize detected $file as $mime\n" );

			return $mime;

		}

		// Also test DjVu

		$deja = new DjVuImage( $file );

		/* Get the array of urls that we already know */

		$knownThumbUrls = $cache->get( $key );

		if ( !$knownThumbUrls ) {

			/* No knownThumbUrls for this file */

			$knownThumbUrls = [];

		} else {

			if ( isset( $knownThumbUrls[$sizekey] ) ) {

				wfDebug( __METHOD__ . ': Got thumburl from local cache: ' .

					"{$knownThumbUrls[$sizekey]} \n" );

				return $knownThumbUrls[$sizekey];

			}

			/* This size is not yet known */

		}

		$metadata = null;

		$foreignUrl = $this->getThumbUrl( $name, $width, $height, $metadata, $params );