A PHP Error was encountered

Severity: Notice

Message: Undefined variable: content

Filename: views/yinsi.html

Line Number: 23

Backtrace:

File: C:\feiyien\application\views\yinsi.html
Line: 23
Function: _error_handler

File: C:\feiyien\application\controllers\api_tool.php
Line: 279
Function: view

File: C:\feiyien\index.php
Line: 292
Function: require_once