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(PHP 5 >= 5.1.0, PECL pdo >= 0.2.0)

PDO::query Executes an SQL statement, returning a result set as a PDOStatement object


public PDOStatement PDO::query ( string $statement )
public PDOStatement PDO::query ( string $statement , int $PDO::FETCH_COLUMN , int $colno )
public PDOStatement PDO::query ( string $statement , int $PDO::FETCH_CLASS , string $classname , array $ctorargs )
public PDOStatement PDO::query ( string $statement , int $PDO::FETCH_INTO , object $object )

PDO::query() executes an SQL statement in a single function call, returning the result set (if any) returned by the statement as a PDOStatement object.

For a query that you need to issue multiple times, you will realize better performance if you prepare a PDOStatement object using PDO::prepare() and issue the statement with multiple calls to PDOStatement::execute().

If you do not fetch all of the data in a result set before issuing your next call to PDO::query(), your call may fail. Call PDOStatement::closeCursor() to release the database resources associated with the PDOStatement object before issuing your next call to PDO::query().


Although this function is only documented as having a single parameter, you may pass additional arguments to this function. They will be treated as though you called PDOStatement::setFetchMode() on the resultant statement object.

Elenco dei parametri


The SQL statement to prepare and execute.

Data inside the query should be properly escaped.

Valori restituiti

PDO::query() returns a PDOStatement object, or FALSE on failure.


Example #1 Demonstrate PDO::query

A nice feature of PDO::query() is that it enables you to iterate over the rowset returned by a successfully executed SELECT statement.

function getFruit($conn) {
$sql 'SELECT name, color, calories FROM fruit ORDER BY name';
    foreach (
$conn->query($sql) as $row) {
$row['name'] . "\t";
$row['color'] . "\t";
$row['calories'] . "\n";

Il precedente esempio visualizzerĂ :

apple   red     150
banana  yellow  250
kiwi    brown   75
lemon   yellow  25
orange  orange  300
pear    green   150
watermelon      pink    90

Vedere anche:

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User Contributed Notes 9 notes

fredrik at NOSPAM dot rambris dot com
7 years ago
The handling of errors by this function is controlled by the attribute PDO::ATTR_ERRMODE.

Use the following to make it throw an exception:
dozoyousan at gmail dot com
8 years ago
> When query() fails, the boolean false is returned.

I think that is "Silent Mode".
If that set attribute ErrorMode "Exception Mode"
then that throw PDOException.
$pdoObj = new PDO( $dsn, $user, $pass );
jonmsawyer at gmail dot com
7 years ago
@ dozoyousan at gmail dot com
> 03-May-2006 05:26
> > When query() fails, the boolean false is returned.
> I think that is "Silent Mode".
> If that set attribute ErrorMode "Exception Mode"
> then that throw PDOException.
> $pdoObj = new PDO( $dsn, $user, $pass );
> $pdoObj->setAttribute("PDO::ATTR_ERRMODE",

What you say is correct, however, your PHP code is incorrect:

// This is fine
$pdoObj = new PDO( $dsn, $user, $pass );
// This line is wrong
// It should be:
// Parameter 1 should not be in quotes. PHP interprets
    // that as a string. Instead, internally, its represented
    // as type LONG INT. Try it :)

Hope this helps. Cheers.
nicobn at gmail dot com
7 years ago
Please note that when Query() fails, it does not return a PDOStatement object . It simply returns false.
marcos at marcosregis dot com
6 years ago
After a lot of hours working with DataLink on Oracle->MySQL and PDO we (me and Adriano Rodrigues, that solve it) discover that PDO (and oci too) need the attribute AUTOCOMMIT set to FALSE to work correctly with.
There's  3 ways to set autocommit to false: On constructor, setting the atribute after construct and before query data or initiating a Transaction (that turns off autocommit mode)

The examples:
// First way - On PDO Constructor
$options = array(PDO::ATTR_AUTOCOMMIT=>FALSE);

$pdo = new PDO($dsn,$user,$pass,$options);

// now we are ready to query DataLinks


// Second Way - Before create statements
$pdo = new PDO($dsn,$user,$pass);

// or

// now we are ready to query DataLinks

To use DataLinks on oci just use OCI_DEFAULT on oci_execute() function;
paolo at dellunto dot net
11 months ago
If you are using PDO to create an SQLite dbfile that will be used by an Android application, you can set common values via the $dbh->query("PRAGMA ...") statement;

a tipical example would be the user_version of the database or the page_size
$dbh = new PDO($PDO_DSN, null, null, null);
$dbh->query("PRAGMA page_size = 4096"); //Android match page size
$dbh->query("PRAGMA user_version = 2"); //This match super(context, DB_NAME, null, DB_VERSION) of the DatabaseOpenHelper
stefano[dot]bertoli [at] gmail[dot]com
23 days ago
Trying to pass like second argument PDO::FETCH_ASSOC it still work.

So passing FETCH TYPE like argument seems work.

This save you from something like:

= $stmt->setFetchMode(PDO::FETCH_NUM);

= $db->query('SELECT * FROM `mytable` WHERE true', PDO::FETCH_ASSOC);

andrea at bhweb dot it
6 years ago
If someone is suffering of the "MySQL server has gone away" problem after executing multiple queries, this is a solution that solved it for me. It's similar to the one needed for the exact same problem in mysqli.

do {
$stmt->fetch(); $stmt->closeCursor(); ++$line; } while($stmt-

I found this only works using prepare and execute this way, not if you
directly execute the query with query().
6 years ago
I found this method extremely useful for getting the iteration count. Note the usage of "for" instead of "while" or "foreach". Just place the "$row = $query->fetch()" as the second condition of your for loop (which is do until). This is the best of both worlds IMHO. Criticism welcome.

try {
    $hostname = "servername";
    $dbname = "dbname";
    $username = "username";
    $pw = "password";
    $pdo = new PDO ("mssql:host=$hostname;dbname=$dbname","$username","$pw");
  } catch (PDOException $e) {
    echo "Failed to get DB handle: " . $e->getMessage() . "\n";
      $query = $pdo->prepare("select name FROM tbl_name");
      for($i=0; $row = $query->fetch(); $i++){
        echo $i." - ".$row['name']."<br/>";

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