[php] PDO error message?

Here is a snippet of my code:

$qry = '
    INSERT INTO non-existant-table (id, score) 
    SELECT id, 40 
    FROM another-non-existant-table
    WHERE description LIKE "%:search_string%"
    AND available = "yes"
    ON DUPLICATE KEY UPDATE score = score + 40
';
$sth = $this->pdo->prepare($qry);
$sth->execute($data);

print_r($this->pdo->errorInfo());

This should give me an error because the tables don't even exist. All I get however is this:

Array ( [0] => 00000 )

How can I get a better description of the error so I can debug the issue?

Maybe this post is too old but it may help as a suggestion for someone looking around on this : Instead of using:

 print_r($this->pdo->errorInfo());

Use PHP implode() function:

 echo 'Error occurred:'.implode(":",$this->pdo->errorInfo());

This should print the error code, detailed error information etc. that you would usually get if you were using some SQL User interface.

Hope it helps

Old thread, but maybe my answer will help someone. I resolved by executing the query first, then setting an errors variable, then checking if that errors variable array is empty. see simplified example:

$field1 = 'foo';
$field2 = 'bar';

$insert_QUERY = $db->prepare("INSERT INTO table bogus(field1, field2) VALUES (:field1, :field2)");
$insert_QUERY->bindParam(':field1', $field1);
$insert_QUERY->bindParam(':field2', $field2);

$insert_QUERY->execute();

$databaseErrors = $insert_QUERY->errorInfo();

if( !empty($databaseErrors) ){  
    $errorInfo = print_r($databaseErrors, true); # true flag returns val rather than print
    $errorLogMsg = "error info: $errorInfo"; # do what you wish with this var, write to log file etc...         

/* 
 $errorLogMsg will return something like: 
 error info:  
 Array(
  [0] => 42000
  [1] => 1064
  [2] => 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 'table bogus(field1, field2) VALUES                                                  ('bar', NULL)' at line 1
 )
*/
} else {
    # no SQL errors.
}

From the manual:

If the database server successfully prepares the statement, PDO::prepare() returns a PDOStatement object. If the database server cannot successfully prepare the statement, PDO::prepare() returns FALSE or emits PDOException (depending on error handling).

The prepare statement likely caused an error because the db would be unable to prepare the statement. Try testing for an error immediately after you prepare your query and before you execute it.

$qry = '
    INSERT INTO non-existant-table (id, score) 
    SELECT id, 40 
    FROM another-non-existant-table
    WHERE description LIKE "%:search_string%"
    AND available = "yes"
    ON DUPLICATE KEY UPDATE score = score + 40
';
$sth = $this->pdo->prepare($qry);
print_r($this->pdo->errorInfo());