How to create random password in php?

Question

I want to create a One Time Password(OTP) for my site. I need some random password for the user, can anyone tell me how it can be done.

Answer 1

See the following code from the QueryHome, what you need is random number generator for the given length -

function poweredby_alphanum($length)
{
  $characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'; //<You can set any string here>
  $charactersLength = strlen($characters);
  $randomString = '';
  for ($i = 0; $i < $length; $i++) {
    $randomString .= $characters[mt_rand(0, $charactersLength - 1)];
  }

  return $randomString;
}