Support the use of global (or other) variables in "arg" method

base.php

@@ -77,7 +77,7 @@ function no_http() {
 
 function arg($arg, $default=null, $validator=null) {
 	$arg = trim($arg);
-	$type = 'string';
+	$type = null;
 
 	$require = false;
 	if (strpos($arg,'*') === 0) {
@@ -116,7 +116,8 @@ function arg($arg, $default=null, $validator=null) {
 	if ($value === null)
 		return !$require ? $default : apiresult(['error' => '<'.$arg.'> parameter must be specified'], 400);
 
-	$value = trim($value);
+	if (gettype($value) === 'string')
+		$value = trim($value);
 	if ($type === 'string')
 		$value = strval($value);
 	else if ($type === 'integer')