several updates in admin controller (buildURL)

implemented two new functions (variable cleaning) to use in future

inc/misc_functions.php

@@ -20,4 +20,29 @@ function buildURL($URI, $https = false)
 	
 	return $url;
 }
+
+function post_default($key, $default='')
+{
+	$_POST[$key] = (isset($_POST[$key])) ? stripslashes($_POST[$key]) : $default;
+}
+
+function clean_input(&$input, $dbobj, $opts = null)
+{
+	$input = trim($input);
+	$input = $dbobj->real_escape_string($input);
+    
+	if ($opts != null)
+	{
+		if (in_array('spchars', $opts)) //special chars
+				$input = htmlspecialchars($input);
+		
+		if (in_array('nnegint', $opts)) //non-negative integer
+		{
+			$int_options = array('options' => array('min_range' => 0));
+			$input = var_dump(filter_var($input, FILTER_VALIDATE_INT, $int_options));
+		}	
+	}
+	else
+		$input = strip_tags($input);     
+}
 ?>