Can\'t tell you exactly why but that function didnt work for me either..
Finally i have found this script i have modified a little bit here: get_browser()
下面是（在functions.php中）：
function whatBrowser() {
//browsers
define("UNKNOWN", 0);
define("TRIDENT", 1);
define("GECKO", 2);
define("PRESTO", 3);
define("WEBKIT", 4);
define("VALIDATOR", 5);
define("ROBOTS", 6);
if(!isset($_SESSION["info"][\'browser\'])) {
$_SESSION["info"][\'browser\'][\'engine\'] = UNKNOWN;
$_SESSION["info"][\'browser\'][\'version\'] = UNKNOWN;
$_SESSION["info"][\'browser\'][\'platform\'] = \'Unknown\';
$navigator_user_agent = \' \' . strtolower($_SERVER[\'HTTP_USER_AGENT\']);
if (strpos($navigator_user_agent, \'linux\')) :
$_SESSION["info"][\'browser\'][\'platform\'] = \'Linux\';
elseif (strpos($navigator_user_agent, \'mac\')) :
$_SESSION["info"][\'browser\'][\'platform\'] = \'Mac\';
elseif (strpos($navigator_user_agent, \'win\')) :
$_SESSION["info"][\'browser\'][\'platform\'] = \'Windows\';
endif;
if (strpos($navigator_user_agent, "trident")) {
$_SESSION["info"][\'browser\'][\'engine\'] = TRIDENT;
$_SESSION["info"][\'browser\'][\'version\'] = floatval(substr($navigator_user_agent, strpos($navigator_user_agent, "trident/") + 8, 3));
}
elseif (strpos($navigator_user_agent, "webkit")) {
$_SESSION["info"][\'browser\'][\'engine\'] = WEBKIT;
$_SESSION["info"][\'browser\'][\'version\'] = floatval(substr($navigator_user_agent, strpos($navigator_user_agent, "webkit/") + 7, 8));
}
elseif (strpos($navigator_user_agent, "presto")) {
$_SESSION["info"][\'browser\'][\'engine\'] = PRESTO;
$_SESSION["info"][\'browser\'][\'version\'] = floatval(substr($navigator_user_agent, strpos($navigator_user_agent, "presto/") + 6, 7));
}
elseif (strpos($navigator_user_agent, "gecko")) {
$_SESSION["info"][\'browser\'][\'engine\'] = GECKO;
$_SESSION["info"][\'browser\'][\'version\'] = floatval(substr($navigator_user_agent, strpos($navigator_user_agent, "gecko/") + 6, 9));
}
elseif (strpos($navigator_user_agent, "robot"))
$_SESSION["info"][\'browser\'][\'engine\'] = ROBOTS;
elseif (strpos($navigator_user_agent, "spider"))
$_SESSION["info"][\'browser\'][\'engine\'] = ROBOTS;
elseif (strpos($navigator_user_agent, "bot"))
$_SESSION["info"][\'browser\'][\'engine\'] = ROBOTS;
elseif (strpos($navigator_user_agent, "crawl"))
$_SESSION["info"][\'browser\'][\'engine\'] = ROBOTS;
elseif (strpos($navigator_user_agent, "search"))
$_SESSION["info"][\'browser\'][\'engine\'] = ROBOTS;
elseif (strpos($navigator_user_agent, "w3c_validator"))
$_SESSION["info"][\'browser\'][\'engine\'] = VALIDATOR;
elseif (strpos($navigator_user_agent, "jigsaw"))
$_SESSION["info"][\'browser\'][\'engine\'] = VALIDATOR;
echo $_SESSION[\'browser\'][\'engine\'];
switch($_SESSION["info"][\'browser\'][\'engine\']) {
case UNKNOWN: echo "unknown";
break;
case TRIDENT: echo "trident";
break;
case GECKO: echo "gecko";
break;
case PRESTO: echo "presto";
break;
case WEBKIT: echo "Webkit";
break;
case VALIDATOR: echo "validator";
break;
case ROBOTS: echo "robot";
}
}
}
Then just change the body tag to this:<body class="<?php whatBrowser(); ?>">
我用铬合金测试了它；Firefox。。。为我工作过gr8。。
希望这有帮助<祝你好运，萨吉夫。
