/** * Creates common globals for the rest of WordPress * * Sets $pagenow global which is the current page. Checks * for the browser to set which one is currently being used. * * Detects which user environment WordPress is being used on. * Only attempts to check for Apache, Nginx and IIS -- three web * servers with known pretty permalink capability. * * Note: Though Nginx is detected, WordPress does not currently * generate rewrite rules for it. See https://codex.wordpress.org/Nginx * * @package WordPress */ global $pagenow, $is_lynx, $is_gecko, $is_winIE, $is_macIE, $is_opera, $is_NS4, $is_safari, $is_chrome, $is_iphone, $is_IE, $is_edge, $is_apache, $is_IIS, $is_iis7, $is_nginx; // On which page are we ? if ( is_admin() ) { // wp-admin pages are checked more carefully if ( is_network_admin() ) preg_match('#/wp-admin/network/?(.*?)$#i', $_SERVER['PHP_SELF'], $self_matches); elseif ( is_user_admin() ) preg_match('#/wp-admin/user/?(.*?)$#i', $_SERVER['PHP_SELF'], $self_matches); else preg_match('#/wp-admin/?(.*?)$#i', $_SERVER['PHP_SELF'], $self_matches); $pagenow = $self_matches[1]; $pagenow = trim($pagenow, '/'); $pagenow = preg_replace('#\?.*?$#', '', $pagenow); if ( '' === $pagenow || 'index' === $pagenow || 'index.php' === $pagenow ) { $pagenow = 'index.php'; } else { preg_match('#(.*?)(/|$)#', $pagenow, $self_matches); $pagenow = strtolower($self_matches[1]); if ( '.php' !== substr($pagenow, -4, 4) ) $pagenow .= '.php'; // for Options +Multiviews: /wp-admin/themes/index.php (themes.php is queried) } } else { if ( preg_match('#([^/]+\.php)([?/].*?)?$#i', $_SERVER['PHP_SELF'], $self_matches) ) $pagenow = strtolower($self_matches[1]); else $pagenow = 'index.php'; } unset($self_matches); // Simple browser detection $is_lynx = $is_gecko = $is_winIE = $is_macIE = $is_opera = $is_NS4 = $is_safari = $is_chrome = $is_iphone = $is_edge = false; if ( isset($_SERVER['HTTP_USER_AGENT']) ) { if ( strpos($_SERVER['HTTP_USER_AGENT'], 'Lynx') !== false ) { $is_lynx = true; } elseif ( strpos( $_SERVER['HTTP_USER_AGENT'], 'Edge' ) !== false ) { $is_edge = true; } elseif ( stripos($_SERVER['HTTP_USER_AGENT'], 'chrome') !== false ) { if ( stripos( $_SERVER['HTTP_USER_AGENT'], 'chromeframe' ) !== false ) { $is_admin = is_admin(); /** * Filters whether Google Chrome Frame should be used, if available. * * @since 3.2.0 * * @param bool $is_admin Whether to use the Google Chrome Frame. Default is the value of is_admin(). */ if ( $is_chrome = apply_filters( 'use_google_chrome_frame', $is_admin ) ) header( 'X-UA-Compatible: chrome=1' ); $is_winIE = ! $is_chrome; } else { $is_chrome = true; } } elseif ( stripos($_SERVER['HTTP_USER_AGENT'], 'safari') !== false ) { $is_safari = true; } elseif ( ( strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false || strpos($_SERVER['HTTP_USER_AGENT'], 'Trident') !== false ) && strpos($_SERVER['HTTP_USER_AGENT'], 'Win') !== false ) { $is_winIE = true; } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Mac') !== false ) { $is_macIE = true; } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Gecko') !== false ) { $is_gecko = true; } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Opera') !== false ) { $is_opera = true; } elseif ( strpos($_SERVER['HTTP_USER_AGENT'], 'Nav') !== false && strpos($_SERVER['HTTP_USER_AGENT'], 'Mozilla/4.') !== false ) { $is_NS4 = true; } } if ( $is_safari && stripos($_SERVER['HTTP_USER_AGENT'], 'mobile') !== false ) $is_iphone = true; $is_IE = ( $is_macIE || $is_winIE ); // Server detection /** * Whether the server software is Apache or something else * @global bool $is_apache */ $is_apache = (strpos($_SERVER['SERVER_SOFTWARE'], 'Apache') !== false || 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 && intval( 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; } return $is_mobile; } News – grscollege.com