A PHP Error was encountered

Severity: Notice

Message: Array to string conversion

Filename: core/Exceptions.php

Line Number: 159

Backtrace:

File: /www/web/360hyh_cn/application/controllers/School.php
Line: 87
Function: count_all_results

File: /www/web/360hyh_cn/index.php
Line: 348
Function: require_once

Array