/**
* 查找字符串第n次出现的位置
* @param string $str 被查找的字符串
* @param string $find 要查找的元素
* @param int $count 指定次数
* @param int $offset 偏移量
* @return int 位置
*/
function getStrPosByCount($str, $find, $count, $offset = 0)
{
$pos = stripos($str, $find, $offset);
$count--;
if ($count > 0 && $pos !== false) {
$pos = getStrPosByCount($str, $find, $count, $pos + 1);
}
return $pos;
}
/**
* 路由分发
*/
public function dispatch()
{
$var = array('path' => C('VAR_PATHINFO'), 'group' => C('VAR_GROUP'), 'controller' => C('VAR_CONTROLLER'), 'action' => C('VAR_ACTION'));
$urlModel = C('URL_MODEL');
$group = $controller = $action = '';
$pathinfo = !empty($_SERVER['PATH_INFO']) ? $_SERVER['PATH_INFO'] : '';
if ($urlModel != self::URL_MODE_NORMAL) {
$pathinfo = isset($_GET[$var['path']]) ? $_GET[$var['path']] : $pathinfo;
unset($_GET[$var['path']]);
}
if (startsWith($pathinfo, '/')) {
$pathinfo = substr($pathinfo, 1);
}
switch ($urlModel) {
case self::URL_MODE_PATHINFO:
case self::URL_MODE_SPECIAL:
case self::URL_MODE_REWRITE:
$virgule = substr_count($pathinfo, '/');
if ($virgule > 2) {
$pos = strpos($pathinfo, '?');
if ($pos) {
$param = explode('&', substr($pathinfo, $pos));
foreach ($param as $slice) {
$slice = explode('=', $slice);
if (count(array_filter($slice)) == 2) {
$_GET[$slice[0]] = $slice[1];
}
}
} else {
for ($i = 3; $i < $virgule; $i += 2) {
$first = getStrPosByCount($pathinfo, '/', $i) + 1;
$last = getStrPosByCount($pathinfo, '/', $i + 2) - $first - 1;
$param = explode('/', substr($pathinfo, $first, $last >= 0 ? $last : -1));
if (count(array_filter($param)) == 2) {
$_GET[$param[0]] = $param[1];
}
}
}
}
if (!empty($pathinfo)) {
$_GET[0] = explode('/', $pathinfo);
}
case self::URL_MODE_NORMAL:
$group = isset($_GET[$var['group']]) ? $_GET[$var['group']] : (isset($_GET[0][0]) ? $_GET[0][0] : C('DEFAULT_GROUP'));
$controller = isset($_GET[$var['controller']]) ? $_GET[$var['controller']] : (isset($_GET[0][1]) ? $_GET[0][1] : C('DEFAULT_CONTROLLER'));
$action = isset($_GET[$var['action']]) ? $_GET[$var['action']] : (isset($_GET[0][2]) ? $_GET[0][2] : C('DEFAULT_ACTION'));
break;
}
define('__DOMAIN__', $_SERVER['HTTP_HOST']);
define('__GROUP__', htmlspecialchars(urldecode($group)));
define('__CONTROLLER__', htmlspecialchars(urldecode($controller)));
define('__ACTION__', htmlspecialchars(urldecode($action)));
define('GROUP_PATH', APP_PATH . __GROUP__ . '/');
$_GET[$var['group']] = __GROUP__;
$_GET[$var['controller']] = __CONTROLLER__;
$_GET[$var['action']] = __ACTION__;
}