fix 返回离当前时间最近的那个时间

fix 返回离当前时间最近的那个时间

Author: dchaofei

面试/笔试题.md

@@ -245,7 +245,7 @@ function ($timeArray,$now) {
     $diff =abs($min-$now);
     $length = count($timeArray);
     for($i=1;$i<$length;$i++) {
-        $diff1 = $timeArray[$i] - $now;
+        $diff1 = abs($timeArray[$i] - $now);
         if($diff1 < $diff) {
             $diff = $diff1;
             $min = timeArray[$i];