Converting mysql_query multi-table select command to PDO - php

Question

I have a couple of questions all pertaining to the same problem. I'm trying to update some of my MySQL connections/commands to PDO in order to mitigate SQL injections. I'm trying to convert this code:
$ulog = $_POST['driver'];
$_SESSION['user_id'] = $ulog;
$tablename_cc = "cc_".$ulog;
$tablename_db = "db_".$ulog;
$tablename_misc = "misc_".$ulog;
$tablename_cash = "cash_".$ulog;
$sql_cc = "SELECT * FROM " .$tablename_cc;
$sql_db = "SELECT * FROM " .$tablename_db;
$sql_misc = "SELECT * FROM " .$tablename_misc;
$sql_cash = "SELECT * FROM " .$tablename_cash;
$result_cc = mysql_query($sql_cc);
$result_db = mysql_query($sql_db);
$result_misc = mysql_query($sql_misc);
$result_cash = mysql_query($sql_cash);
To the following code:
$tables = array($tablename_cc, $tablename_db, $tablename_misc, $tablename_cash);
$A = count($tables);
$result = array();
try {
$STH = $DBH->prepare('SELECT * FROM :table');
$i = 0;
while($i < $A) {
$STH->bindParam(':table', $tables[$i]);
$STH->execute();
$result[$i] = $STH->fetchAll();
$i++;
}
}
catch(PDOException $e) {
echo $e->getMessage();
}
However, I keep getting a syntax error. The error goes away if I try it in the following way, but this way is not very useful to me because it does not avoid SQL injections.
try {
$i = 0;
while($i < $A) {
$STH = $DBH->query('SELECT * FROM ' .$tables[$i]);
$result[$i] = $STH->fetchAll();
$i++;
}
}
catch(PDOException $e) {
echo $e->getMessage();
}
Although this last method works, from my understanding it does not help with mitigating SQL injection. And a secondary issue I'm running across is that sometimes these tables will not exist and my workaround for these issues in the old method was to do a small check:
$result_cc = mysql_query($sql_cc);
if(mysql_num_rows($result_cc) != 0){}
However, this intermediate step seems to be gone in PDO, so I still need to figure out how to check for this.