merge from qinghaihu branch, add recursive dir function

application/models/mydir.php

@@ -33,5 +33,43 @@ class mydir{
 	function getLast()
 	{
 		return $this->list[count($this->list)-1];
+	}
+
+	function array_flat($array) 
+	{
+		foreach($array as $a) 
+		{
+			if(is_array($a)) 
+			{
+				$tmp = array_merge($tmp, $this->array_flat($a));
+			}else {
+				$tmp[] = $a;
+			}
+		}
+		return $tmp;
 	}	
+
+	function recursive($dir) 
+	{
+		$files = array();
+		if ($handle = opendir($dir)) 
+		{
+			while (false !== ($file = readdir($handle))) 
+			{
+				if ($file != "." && $file != "..") 
+				{
+					if(is_dir($dir.'/'.$file)) 
+					{
+						$dir2 = $dir.'/'.$file;
+						$files[]=$dir2.'/';
+						$files[] = $this->recursive($dir2);
+					} else {
+						$files[] = $dir.'/'.$file;
+					}
+				}
+			}
+			closedir($handle);
+		}
+		return $this->array_flat($files);
+	}	 
 }