https://www.mediawiki.org/wiki/Manual:$wgLogos has an example of
$wgLogos = [ '1x' => "path/to/1x_version.png", '1.5x' => "path/to/1.5x_version.png", '2x' => "path/to/2x_version.png", 'svg' => "path/to/svg_version.svg", 'icon' => "path/to/icon.png", // A version of the logo without wordmark and tagline 'wordmark' => [ 'src' => "path/to/wordmark_version.png", '1x' => "path/to/wordmark_version.svg", // optional if you want to support browsers with SVG support with an SVG logo. 'width' => 135, 'height' => 20, ], 'tagline' => [ 'src' => "path/to/tagline_version.png", 'width' => 135, 'height' => 15, ], ];
DefaultSettings has:
/** * The URL path to various wiki logos. * The `1x` logo size should be 135x135 pixels. * The `1.5x` 1.5x version of square logo * The `2x` 2x version of square logo * The `svg` version of square logo * The `wordmark` key should point to an array with the following fields * - `src` relative or absolute path to a landscape logo * - `width` defining the width of the logo in pixels. * - `height` defining the height of the logo in pixels. * All values can be either an absolute or relative URI * Configuration is optional provided $wgLogo is used instead. * Defaults to [ "1x" => $wgLogo ], * or [ "1x" => "$wgResourceBasePath/resources/assets/wiki.png" ] if $wgLogo is not set. * @since 1.35 * @var array|false */ $wgLogos = false;
No mention of icon, tagline...