root/branches/2.0/wp-includes/vars.php

<?php

// 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];
    $pagenow = preg_replace('#\?.*?$#', '', $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 = 0; $is_gecko = 0; $is_winIE = 0; $is_macIE = 0; $is_opera = 0; $is_NS4 = 0;

if (preg_match('/Lynx/', $_SERVER['HTTP_USER_AGENT'])) {
    $is_lynx = 1;
} elseif (preg_match('/Gecko/', $_SERVER['HTTP_USER_AGENT'])) {
    $is_gecko = 1;
} elseif ((preg_match('/MSIE/', $_SERVER['HTTP_USER_AGENT'])) && (preg_match('/Win/', $_SERVER['HTTP_USER_AGENT']))) {
    $is_winIE = 1;
} elseif ((preg_match('/MSIE/', $_SERVER['HTTP_USER_AGENT'])) && (preg_match('/Mac/', $_SERVER['HTTP_USER_AGENT']))) {
    $is_macIE = 1;
} elseif (preg_match('/Opera/', $_SERVER['HTTP_USER_AGENT'])) {
    $is_opera = 1;
} elseif ((preg_match('/Nav/', $_SERVER['HTTP_USER_AGENT']) ) || (preg_match('/Mozilla\/4\./', $_SERVER['HTTP_USER_AGENT']))) {
    $is_NS4 = 1;
}
$is_IE    = (($is_macIE) || ($is_winIE));

// Server detection
$is_apache = ( strstr($_SERVER['SERVER_SOFTWARE'], 'Apache') || strstr($_SERVER['SERVER_SOFTWARE'], 'LiteSpeed') ) ? 1 : 0;
$is_IIS = strstr($_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS') ? 1 : 0;

// On OS X Server, $_SERVER['REMOTE_ADDR'] is the server's address. Workaround this 
// by using $_SERVER['HTTP_PC_REMOTE_ADDR'], which *is* the remote address.
if ( isset($_SERVER['HTTP_PC_REMOTE_ADDR']) )
    $_SERVER['REMOTE_ADDR'] = $_SERVER['HTTP_PC_REMOTE_ADDR'];

// if the config file does not provide the smilies array, let's define it here
if (!isset($wpsmiliestrans)) {
    $wpsmiliestrans = array(
    ':mrgreen:'    => 'icon_mrgreen.gif',
    ':neutral:'    => 'icon_neutral.gif',
    ':twisted:'    => 'icon_twisted.gif',
    ':arrow:'    => 'icon_arrow.gif',
    ':shock:'    => 'icon_eek.gif',
    ':smile:'    => 'icon_smile.gif',
    ' :???:'    => 'icon_confused.gif',
    ':cool:'    => 'icon_cool.gif',
    ':evil:'    => 'icon_evil.gif',
    ':grin:'    => 'icon_biggrin.gif',
    ':idea:'    => 'icon_idea.gif',
    ':oops:'    => 'icon_redface.gif',
    ':razz:'    => 'icon_razz.gif',
    ':roll:'    => 'icon_rolleyes.gif',
    ':wink:'    => 'icon_wink.gif',
    ':cry:'        => 'icon_cry.gif',
    ':eek:'        => 'icon_surprised.gif',
    ':lol:'        => 'icon_lol.gif',
    ':mad:'        => 'icon_mad.gif',
    ':sad:'        => 'icon_sad.gif',
    ' 8-)'        => 'icon_cool.gif',
    ' 8-O'        => 'icon_eek.gif',
    ' :-('        => 'icon_sad.gif',
    ' :-)'        => 'icon_smile.gif',
    ' :-?'        => 'icon_confused.gif',
    ' :-D'        => 'icon_biggrin.gif',
    ' :-P'        => 'icon_razz.gif',
    ' :-o'        => 'icon_surprised.gif',
    ' :-x'        => 'icon_mad.gif',
    ' :-|'        => 'icon_neutral.gif',
    ' ;-)'        => 'icon_wink.gif',
    ' 8)'        => 'icon_cool.gif',
    ' 8O'        => 'icon_eek.gif',
    ' :('        => 'icon_sad.gif',
    ' :)'        => 'icon_smile.gif',
    ' :?'        => 'icon_confused.gif',
    ' :D'        => 'icon_biggrin.gif',
    ' :P'        => 'icon_razz.gif',
    ' :o'        => 'icon_surprised.gif',
    ' :x'        => 'icon_mad.gif',
    ' :|'        => 'icon_neutral.gif',
    ' ;)'        => 'icon_wink.gif',
    ':!:'        => 'icon_exclaim.gif',
    ':?:'        => 'icon_question.gif',
    );
}


// generates smilies' search & replace arrays
foreach($wpsmiliestrans as $smiley => $img) {
    $wp_smiliessearch[] = $smiley;
    $smiley_masked = htmlspecialchars( trim($smiley) , ENT_QUOTES);
    $wp_smiliesreplace[] = " <img src='" . get_settings('siteurl') . "/wp-includes/images/smilies/$img' alt='$smiley_masked' class='wp-smiley' /> ";
}

?>