pathinfo()对多字节字符处理的缺陷

// your code goes here
echo phpversion();

print_r(pathinfo("/resources/img/stock/wxb001/美景.png"));
//输出：5.3.3
Array
(
    [dirname] => /var/www/www.shima.jp.net/resources/img/stock/wxb001
    [basename] => .png
    [extension] => png
    [filename] =>
)
// 同时，在php5.3中basename()也会过滤掉多字节字符
echo basename('/resources/img/stock/wxb001/美景.png')
// 输出：.png

//your code goes here
$file = '/resources/img/stock/wxb001/美景.png';
$file_dir = dirname($file );
$file_basename = substr(strrchr($file, DIRECTORY_SEPARATOR), 1);
$file_name = substr($file_basename, 0, strrpos($file_basename, "."));
$file_extension = end(explode(".", $file_basename));
echo $file_dir; // /resources/img/stock/wxb001
echo $file_basename;  // 美景.png
echo $file_name; // 美景
echo $file_extension; // png