strpos( $_SERVER['SERVER_SOFTWARE'], 'LiteSpeed' ) !== false ); /** * Whether the server software is Nginx or something else * * @global bool $is_nginx */ $is_nginx = ( strpos( $_SERVER['SERVER_SOFTWARE'], 'nginx' ) !== false ); /** * Whether the server software is IIS or something else * * @global bool $is_IIS */ $is_IIS = ! $is_apache && ( strpos( $_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS' ) !== false || strpos( $_SERVER['SERVER_SOFTWARE'], 'ExpressionDevServer' ) !== false ); /** * Whether the server software is IIS 7.X or greater * * @global bool $is_iis7 */ $is_iis7 = $is_IIS && (int) substr( $_SERVER['SERVER_SOFTWARE'], strpos( $_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS/' ) + 14 ) >= 7; /** * Test if the current browser runs on a mobile device (smart phone, tablet, etc.) * * @since 3.4.0 * * @return bool */ function wp_is_mobile() { if ( empty( $_SERVER['HTTP_USER_AGENT'] ) ) { $is_mobile = false; } elseif ( strpos( $_SERVER['HTTP_USER_AGENT'], 'Mobile' ) !== false // Many mobile devices (all iPhone, iPad, etc.) || strpos( $_SERVER['HTTP_USER_AGENT'], 'Android' ) !== false || strpos( $_SERVER['HTTP_USER_AGENT'], 'Silk/' ) !== false || strpos( $_SERVER['HTTP_USER_AGENT'], 'Kindle' ) !== false || strpos( $_SERVER['HTTP_USER_AGENT'], 'BlackBerry' ) !== false || strpos( $_SERVER['HTTP_USER_AGENT'], 'Opera Mini' ) !== false || strpos( $_SERVER['HTTP_USER_AGENT'], 'Opera Mobi' ) !== false ) { $is_mobile = true; } else { $is_mobile = false; } /** * Filters whether the request should be treated as coming from a mobile device or not. * * @since 4.9.0 * * @param bool $is_mobile Whether the request is from a mobile device or not. */ return apply_filters( 'wp_is_mobile', $is_mobile ); }