加载form_validation类出错

你跺你也麻

Severity: Runtime Notice

Message: Declaration of MY_Form_validation::set_rules() should be compatible with that of CI_Form_validation::set_rules()

Filename: libraries/MY_Form_validation.php

Line Number: 1490

Severity: Runtime Notice

Message: Declaration of MY_Form_validation::valid_ip() should be compatible with that of CI_Form_validation::valid_ip()

Filename: libraries/MY_Form_validation.php

Line Number: 1490

只要使用$this->load->library('form_validation');就会报上面两个错，新手求助