Description:
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a prepared statement used in a class.

$this->mysql == mysql connection
$database == name of the database

Reproduce code:
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example #1 (work):
$stmt = $this->mysql->prepare("SHOW TABLES FROM ".$database);
$stmt->execute();

example #2 (don't work):
$stmt = $this->mysql->prepare("SHOW TABLES FROM ?");
$stmt->execute(array($database));

Expected result:
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both examples should work!

Actual result:
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error: 42000 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''databasename'' at line 1