<?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 and IIS. Two web servers

 * with known permalink capability.

 *

 * @package WordPress

 */

// On which page are we ?

if ( is_admin() ) {

	// wp-admin pages are checked more carefully

	preg_match('#/wp-admin/?(.*?)$#i', $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', $PHP_SELF, $self_matches) )

		$pagenow = strtolower($self_matches[1]);

	else

		$pagenow = 'index.php';

}

// Simple browser detection

$is_lynx = $is_gecko = $is_winIE = $is_macIE = $is_opera = $is_NS4 = $is_safari = $is_chrome = $is_iphone = false;

if (strpos($_SERVER['HTTP_USER_AGENT'], 'Lynx') !== false) {

	$is_lynx = true;

} elseif ( strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'chrome') !== false ) {

	$is_chrome = true;

} elseif ( strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'safari') !== false ) {

	$is_safari = true;

} elseif (strpos($_SERVER['HTTP_USER_AGENT'], 'Gecko') !== false) {

	$is_gecko = true;

} elseif (strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false && strpos($_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'], '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 ( $is_safari && strpos(strtolower($_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 IIS or something else

 * @global bool $is_IIS

 */

$is_IIS = (strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS') !== false || strpos($_SERVER['SERVER_SOFTWARE'], 'ExpressionDevServer') !== false);

/**

 * Whether the server software is IIS 7.X

 * @global bool $is_iis7

 */

$is_iis7 = (strpos($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS/7.') !== false);

?>