CodeIgniter中getMethod方法已弃用？求原因及修复方案

替代方案 #

针对getMethod()方法弃用的问题，有两种可行的解决方式：

方式1：直接使用请求类型判断方法（推荐） #

CodeIgniter提供了更直观的is()方法来判断请求类型，无需手动比较方法名，彻底规避大小写和弃用问题：

public function insert()
{ 
    if ($this->request->is('post')) { // 不区分大小写，传入'POST'也可正常判断
        $validation = \Config\Services::validation();

        $rules = [
            "txtSN" => [
                "label" => "Student Number",
                "rules" => "required"
            ],
            "txtFN" => [
                "label" => "First Name",
                "rules" => "required|min_length[3]|max_length[20]"
            ],
            "txtMN" => [
                "label" => "Middle Name",
                "rules" => "required|min_length[3]|max_length[20]"
            ],
            "txtLN" => [
                "label" => "Last Name",
                "rules" => "required|min_length[3]|max_length[20]"
            ],
            "cbSex" => [
                "label" => "Sex",
                "rules" => "required"
            ],
            "txtDOB" => [
                "label" => "Date of Birth",
                "rules" => "required"
            ],
        ];
    }
}

方式2：手动处理方法名大小写（需严格匹配时用） #

按照PSR-7规范，新版本getMethod()默认返回大写方法名（如'POST'、'GET'），如果确实需要获取方法名并做比较，可直接使用默认返回值：

public function insert()
{ 
    if ($this->request->getMethod() == 'POST') {
        $validation = \Config\Services::validation();

        $rules = [
            "txtSN" => [
                "label" => "Student Number",
                "rules" => "required"
            ],
            "txtFN" => [
                "label" => "First Name",
                "rules" => "required|min_length[3]|max_length[20]"
            ],
            "txtMN" => [
                "label" => "Middle Name",
                "rules" => "required|min_length[3]|max_length[20]"
            ],
            "txtLN" => [
                "label" => "Last Name",
                "rules" => "required|min_length[3]|max_length[20]"
            ],
            "cbSex" => [
                "label" => "Sex",
                "rules" => "required"
            ],
            "txtDOB" => [
                "label" => "Date of Birth",
                "rules" => "required"
            ],
        ];
    }
}

注：若你的CodeIgniter版本中getMethod()默认返回小写，只需将比较字符串改为'post'，或用strtoupper($this->request->getMethod())转换后再比较。

内容的提问来源于stack exchange，提问作者Zekken