<?php
$post_title_edited=$post1 . "vs" . $post2;

$con2=mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name2")or die("cannot select DB");


// Create table
$create = 'CREATE TABLE  '. $post_title_edited .'
(
  id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
  user VARCHAR(30) NOT NULL,
  user_post VARCHAR(2000) NOT NULL,
  date VARCHAR(30) NOT NULL
)';



// Execute query
mysql_query($create,$con2);

echo $post_title_edited;



$query='SELECT LAST(id) as LastId FROM '.$post_title_edited.'';
$last=mysql_query($query);

echo $last;
?>

$query='SELECT id as LastId FROM '.$post_title_edited.' ORDER BY LastId DESC LIMIT 1';