用PHP实现强密码

Question

I am trying to check, if a user has created a password that contains symbols (including +,-,= signs) OR/AND numbers. How can I do that?

function check_password($str)
{

   if (!preg_match ("/[&@<>%\*\,\^!#$%().]/i", $str))

    {
        $this->form_validation->set_message('check_password', 'Your password should contain a number,letter,and special characters"');
        return FALSE;
    }
    else
    {
        return TRUE;
    }

} 

Thanks.

Answer 1

You don't have to list all those characters. Anything that is not a number or a letter is a special character (or space):

(?:[^0-9A-z]|[0-9])