用户改版网站，将原来的主题改为响应式主题，同时专门为手机制作了主题。这个时候，我们采用了mobile theme这个方案，做了修改，将mobile detect的缓存代码改了一下，放到了mobile theme下面。
用户想要支持IE7,8,9，老版本的IE。响应式的主题下面由于使用swiper.js，默认不支持ie9。这个时候，我们决定采用mobile theme方案，在它的基础上进行修改：
增加对于ie的检查：
function mobile_theme_detect_ie_lower_version() {
//$mobile_browser = 0;
$is_ie_lower_version = false;
$user_agent = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : "";
preg_match('/MSIE (.*?);/', $user_agent, $matches);
if(count($matches)<2){
preg_match('/Trident\/\d{1,2}.\d{1,2}; rv:([0-9]*)/', $_SERVER['HTTP_USER_AGENT'], $matches);
}
if (count($matches)>1){
//Then we're using IE
$version = $matches[1];
switch(true){
case ($version<=8):
//IE 8 or under!
$is_ie_lower_version = true;
break;
case ($version==9):
$is_ie_lower_version = true;
break;
case ($version==10):
break;
case ($version==11):
//Version 11!
break;
default:
//You get the idea
}
}
/*
$is_ie7 = (bool)preg_match('/msie 7./i', $user_agent );
$is_ie8 = (bool)preg_match('/msie 8./i', $user_agent );
$is_ie9 = (bool)preg_match('/msie 9./i', $user_agent );
//$is_ie10 = (bool)preg_match('/msie 10./i', $user_agent );
if($is_ie7 || $is_ie8 || $is_ie9){
$is_ie_lower_version = true;
}
*/
return $is_ie_lower_version;
}
在hook_custom_theme()里面判断主题：
function mobile_theme_custom_theme() {
// Retrieve the detection method.
$method = variable_get('mobile_theme_detection', 'mobile_theme_detect_php');
// If the detection method cannot be found, revert to default
if (!function_exists($method)) {
$method = "mobile_theme_detect_php";
}
// Check if this is a mobile
$mobile_device = $method();
if ($mobile_device) {
//同时修改boost存放目录
global $conf;
$conf['boost_normal_dir'] = 'mobile';
$conf['boost_gzip_dir'] = 'mobile';
$theme = variable_get('mobile_theme_selection', 'default');
if ($theme != 'default') {
return $theme;
}
}
$ie_lower_version = mobile_theme_detect_ie_lower_version();
//watchdog('mobile_theme', 'ie_lower_version: '. $ie_lower_version .':'.$_SERVER['HTTP_USER_AGENT']);
//$ie_lower_version = true;
if ($ie_lower_version) {
//同时修改boost存放目录
global $conf;
$conf['boost_normal_dir'] = 'ie';
$conf['boost_gzip_dir'] = 'ie';
$theme = variable_get('mobile_theme_ie', 'default');
if ($theme != 'default') {
return $theme;
}
}
}
增加页面缓存支持，使得对于同一个页面，Drupal页面缓存三份：PC，IE，Mobile。
….
function getMultiple(&$cids) {
if (is_array($cids)) {
foreach ($cids as $key => $cid) {
$cids[$key] = $this->mobile_detect_caching_alter_cid() . $cid;
}
}
return parent::getMultiple($cids);
}
protected function mobile_detect_caching_alter_cid() {
$device = '';
$is_mobile = $this->mobile_detect_by_php();
if(!empty($is_mobile)){
$device = 'mobile:';
}else{
$ie_lower_version = mobile_theme_detect_ie_lower_version();
if ($ie_lower_version) {
$device = 'ielower:';
}
}
return $device;
}
…
经过测试，上述代码在IE8下面运行良好，同时支持缓存。
