https://www.facebook.com/groups/nao.tem.biscoito/permalink/10157561242445160/

index.php

<?php
include 'db.php';

$result = $MySQLiconn->query("select table_name from information_schema.tables where table_name like 'tb%' order by 1");

$t1 = array();

while ($row = mysqli_fetch_array($result)) {
    $t1[] = $row;
}

$count = count($t1);

echo $count;
echo "<br />"; 

mysqli_free_result($result);