<?
error_reporting(E_ALL ^ E_NOTICE); 
$imgurl='http://files.jb51.net/file_images/article/201408/201408232212306.png';
$imgurl_dir='/img/2014/07/02/14520384.gif';
//echo getimg($imgurl,'./img');
var_dump(url_set_value($imgurl));
var_dump(url_set_value($imgurl_dir));

/**
 * function name:url_set_value
 * User: Don
 * Date: 14-8-2
 * Time: 上午12:43
 */
function url_set_value($url) 
{ 
$a=explode('/',$url);
$url_set=array();
for($n=0 ;$n<count($a);$n++)
{
 //var_dump($a);
 if($a[$n]=='http:')
 {
  $url_set['base_url']=$a[$n+2];
  for($p=$n+3 ;$p<count($a)-1;$p++)
    $url_set['img_dir_path'].='/'.$a[$p];
  $url_set['img_path']= $a[count($a)-1];
  $url_set['img_ful_path']= $url_set['img_dir_path'].$url_set['img_path'];
 }
 else
 { for($p=0 ;$p<count($a)-1;$p++)
   if($a[$p]!=='')
   $url_set['img_dir_path'].='/'.$a[$p];
   
   $url_set['img_path']= $a[count($a)-1];
   $url_set['img_ful_path']= $url_set['img_dir_path'].$url_set['img_path'];
  }
  return $url_set;
}
}
?>

array(4) {
 ["base_url"]=>
 string(14) "files.jb51.net"
 ["img_dir_path"]=>
 string(27) "/file_images/article/201408"
 ["img_path"]=>
 string(19) "201408232212306.png"
 ["img_ful_path"]=>
 string(46) "/file_images/article/201408201408232212306.png"
}
array(3) {
 ["img_dir_path"]=>
 string(15) "/img/2014/07/02"
 ["img_path"]=>
 string(12) "14520384.gif"
 ["img_ful_path"]=>
 string(27) "/img/2014/07/0214520384.gif"
}