WordPress/wp-includes/vars.php

<?php

// On which page are we ?
$PHP_SELF = $_SERVER['PHP_SELF'];
if (preg_match('#([^/]+.php)#', $PHP_SELF, $self_matches)) {
	$pagenow = $self_matches[1];
} else if (strstr($PHP_SELF, '?')) {
	$pagenow = explode('/', $PHP_SELF);
	$pagenow = trim($pagenow[(sizeof($pagenow)-1)]);
	$pagenow = explode('?', $pagenow);
	$pagenow = $pagenow[0];
} else {
	$pagenow = 'index.php';
}

// Simple browser detection
$is_lynx = 0; $is_gecko = 0; $is_winIE = 0; $is_macIE = 0; $is_opera = 0; $is_NS4 = 0;
if (!isset($HTTP_USER_AGENT)) {
	$HTTP_USER_AGENT = $_SERVER['HTTP_USER_AGENT'];
}
if (preg_match('/Lynx/', $HTTP_USER_AGENT)) {
	$is_lynx = 1;
} elseif (preg_match('/Gecko/', $HTTP_USER_AGENT)) {
	$is_gecko = 1;
} elseif ((preg_match('/MSIE/', $HTTP_USER_AGENT)) && (preg_match('/Win/', $HTTP_USER_AGENT))) {
	$is_winIE = 1;
} elseif ((preg_match('/MSIE/', $HTTP_USER_AGENT)) && (preg_match('/Mac/', $HTTP_USER_AGENT))) {
	$is_macIE = 1;
} elseif (preg_match('/Opera/', $HTTP_USER_AGENT)) {
	$is_opera = 1;
} elseif ((preg_match('/Nav/', $HTTP_USER_AGENT) ) || (preg_match('/Mozilla\/4\./', $HTTP_USER_AGENT))) {
	$is_NS4 = 1;
}
$is_IE    = (($is_macIE) || ($is_winIE));

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

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

// sorts the smilies' array
if (!function_exists('smiliescmp')) {
function smiliescmp ($a, $b) {
	if (strlen($a) == strlen($b)) {
		return strcmp($a, $b);
	}
		return (strlen($a) > strlen($b)) ? -1 : 1;
	}
}
uksort($wpsmiliestrans, 'smiliescmp');

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

?>