Generate password from specific string

please help on how to auto-increment the password base on my inputted number.

<?php
function password_generate($chars)
{
  $data = '1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcefghijklmnopqrstuvwxyz';
  return substr(str_shuffle($data), 0, $chars);
}
  echo password_generate(9)."\n";
?>

For example, I enter 10 in the input box, the result should be 10 generated passwords.

ASDZXCqwe
zxcASDqff
ASDXZCqwg
ASDXZCSFf
ASWQEGGGx
zxcASFGee
XCVXCVrfd
CVBSDFwer
DFGWXcvvv
CVXDSFDFf

Thanks a bunch for the help.