<?php

function generatePassword($maxString = 10, $allowLettersAndNumbers = true) {
  $passwordGenerated = "";
  $alphabet = "AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz012345679";
  while ($maxString > 0) {
    $randomNumber = rand(0, 60);
    $splitAlphabet = explode(' ', $alphabet);
    $passwordGenerated .= $splitAlphabet[0][$randomNumber];
    $maxString--;
  }
  return $passwordGenerated;
}

echo "A senha gerada foi: " . generatePassword(18);