Question

After creating table using exec() in PDO,it shows like this

Array ( [0] => 00000 [1] => [2] => )

Is this an error or did I successfully create my table?
When I looked up in the database the table is created.

this is what i executed

try{

    $tbl = new PDO("mysql:host=localhost;dbname=myDB",'root',''); 
     $tbl->exec("CREATE TABLE test(fld1 CHAR(40),fld2 CHAR(40))")
     or die(print_r($tbl->errorInfo(),true));
   }
catch(Exception $e){
     echo $e.getMessage();
 } 

@Vikas,correct me if i am wrong.and this is working

    $queryTBl="CREATE TABLE test(fld1 CHAR(40),fld2 CHAR(40))";

    $evaluateTBL=tbl->exec($queryTBL);

    if ($evaluateTBL===false)
         print "Test table could not be created";
    else
         print "Successfully Created";

Answer 1

According to PDO::exec manual it returns number of rows affected by the query. And there is no rows affected by a CREATE query. So exec for this query will return 0 even if it was successful. And it will be evaluated false. This explains why die is called even when there is no error.

It is better to either rely on exception or do a === false on return code of exec to decide if it failed. From the manual:

This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE. Please read the section on Booleans for more information. Use the === operator for testing the return value of this function.

Example of doing the same thing with exceptions:

try {
  $connection = new PDO("mysql:host=localhost;dbname=myDB",'root','');
  $connection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

  $connection->exec('CREATE TABLE test(fld1 CHAR(40),fld2 CHAR(40))');
} catch (PDOException $e) {
  <handle exception>
}