HTML Examples/WP.iso/wordpress/wp-includes/vars.php

PHP Script | 2017-06-15 | 5.5 KB | 151 lines

<?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 );
}