PHP从URL中获取文件名和后缀等信息

<?php
$url = 'http://www.baidu.com/a/b/c/index.php?id=10';
$arr = parse_url($url);
var_dump($arr);
$arr2 = pathinfo($arr['path']);
var_dump($arr2);

//运行结果如下：
array(4) {
  ["scheme"]=>
  string(4) "http"
  ["host"]=>
  string(13) "www.baidu.com"
  ["path"]=>
  string(16) "/a/b/c/index.php"
  ["query"]=>
  string(5) "id=10"
}
array(4) {
  ["dirname"]=>
  string(6) "/a/b/c"
  ["basename"]=>
  string(9) "index.php"
  ["extension"]=>
  string(3) "php"
  ["filename"]=>
  string(5) "index"
}
?>