Question

I am updating some code from the old mysql_* functions to PDO. It connects without a problem, runs the query without a problem, but the resultset is empty. PDO::query() is supposed to return a PDOStatement object, yet I am getting true in return. No errors are reported.

Here is my code:

 try {     $DB = new PDO('mysql:host=localhost;dbname=dbname', 'user', 'pass');     $stmt = $DB->prepare('SELECT * FROM report_clientinfo');     $stmt->execute(); }catch(PDOException $e) {     echo $e->getMessage() . '\n'; }   echo gettype($stmt) . '\n'; if ($stmt) echo 'true\n'; else echo 'false\n';  $resultset = $stmt->fetchAll();  if(empty($resultset)) {     exit('ERROR: getClientInfo query failed.'); }  $DB = null;  print_r($resultset);  

The output I am seeing is:

object true ERROR: getClientInfo query failed.

Any ideas why it is not returning any results?

Answer 1

object   true   ERROR: getClientInfo query failed. 

It looks to me like your PDOStatement $stmt variable is in fact reported to be an object, not ‘true‘. The code then prints ‘true‘ when it sees that $stmt is non-null, which it is, because it’s an object.

I recommend that you check the return value from $stmt->execute(). You might have an SQL error. For example, if you misspelled the table name, or the table doesn’t exist in the database ‘dbname‘ that you connected to, or the user you login as doesn’t have privilege to query that table.

Also check $stmt->errorInfo() to get more details on any error that occurred.