access direct to other method when used $this->input->method

hi everyone
i have below code 

PHP Code:

public function resend_mobile_verify()
{
        if($this->input->method() == 'get')
        {
        }
} 


    {

PHP Code:

public function change_mobile_info()
{
        if($this->input->method() == 'post')
        {
            $this->resend_mobile_verify();
        }
} 


when i want to below code i cant direct access to resend_mobile_verify method because use post method


    {

PHP Code:

public function change_mobile_info()
{
        if($this->input->method() == 'post')
        {
            $this->resend_mobile_verify();
        }
} 


how i can use resend_mobile_verify method directly?

best regard.