helpers.php

<?php
function randomPassword(){
    $str = "abcdefghijklmnopqrstuwvxyzABCDEFGHIJKLMNOPKRSTUWVXYZ0123456789!@#$&*-+=";
    $caracter =  str_split($str);
    $senha = '';
    for ($i = 0; $i < 8; $i++){ //senha de 8 caracteres
        $indice = rand(0, strlen($str)-1);
        $senha .= $caracter[$indice];
    }
    Return $senha;
}