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<?php
/**
* 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;
}
/**
* 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 );
}