Edit Report a Bug

    PDO::query

    (PHP 5 >= 5.1.0, PHP 7, PHP 8, PECL pdo >= 0.2.0)

    PDO::query — Prepares and executes an SQL statement without placeholders

    Descrizione

    public PDO::query(string $query, ?int $fetchMode = null): PDOStatement|false
    public PDO::query(string $query, ?int $fetchMode = PDO::FETCH_COLUMN, int $colno): PDOStatement|false
    public PDO::query(
        string $query,
        ?int $fetchMode = PDO::FETCH_CLASS,
        string $classname,
        array $constructorArgs
    ): PDOStatement|false
    public PDO::query(string $query, ?int $fetchMode = PDO::FETCH_INTO, object $object): PDOStatement|false

    PDO::query() prepares and executes an SQL statement in a single function call, returning 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().

    Nota:

    If the query contains placeholders, the statement must be prepared and executed separately using PDO::prepare() and PDOStatement::execute() methods.

    Elenco dei parametri

    query

    The SQL statement to prepare and execute.

    If the SQL contains placeholders, PDO::prepare() and PDOStatement::execute() must be used instead. Alternatively, the SQL can be prepared manually before calling PDO::query(), with the data properly formatted using PDO::quote() if the driver supports it.

    fetchMode

    The default fetch mode for the returned PDOStatement. It must be one of the PDO::FETCH_* constants.

    If this argument is passed to the function, the remaining arguments will be treated as though PDOStatement::setFetchMode() was called on the resultant statement object. The subsequent arguments vary depending on the selected fetch mode.

    Valori restituiti

    Returns a PDOStatement object o false in caso di fallimento.

    Errori/Eccezioni

    Emits an error with level E_WARNING if the attribute PDO::ATTR_ERRMODE is set to PDO::ERRMODE_WARNING.

    Throws a PDOException if the attribute PDO::ATTR_ERRMODE is set to PDO::ERRMODE_EXCEPTION.

    Esempi

    Example #1 SQL with no placeholders can be executed using PDO::query()

    <?php
    $sql     = 'SELECT name, color, calories FROM fruit ORDER BY name';
    foreach (    $conn->query($sql) as $row) {
    print     $row['name'] . "\t";
    print     $row['color'] . "\t";
    print     $row['calories'] . "\n";
    }
    ?>

    Il precedente esempio visualizzerà:

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

    Vedere anche:

    add a note add a note

    User Contributed Notes 6 notes

    up
    42
    fredrik at NOSPAM dot rambris dot com
    17 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:
    <?php
    $dbh    ->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    ?>
    up
    2
    Ilyas Bakirov
    3 years ago
    I would like to mention fetching rows from SQL query using PDO:

    <?php

    $dbh     = new PDO('mysql:host=localhost;dbname=test', $user, $pass);

    // use the connection here
    $sth = $dbh->query('SELECT * FROM countries');

    // fetch all rows into array, by default PDO::FETCH_BOTH is used
    $rows = $stm->fetchAll();

    // iterate over array by index and by name
    foreach($rows as $row) {

            printf("$row[0] $row[1] $row[2]\n");
            printf("$row['id'] $row['name'] $row['population']\n");

    }
    ?>
    up
    3
    stefano[dot]bertoli [at] gmail[dot]com
    10 years 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:

    <?php
    $result     = $stmt->setFetchMode(PDO::FETCH_NUM);
    ?>

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

    ?>
    up
    1
    JJimenez
    1 year ago
    When you make a wraper for PDO:query, you must define the method like this:

    public function query( string $sql,  ?int $fetchMode = null, mixed ...$fetchModeArgs) : \PDOStatement|false
       
    if you delete one of the parameters or use one of the oficials parameters you get a Fatal error
    up
    0
    dozoyousan at gmail dot com
    18 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 );
    $pdoObj->setAttribute("PDO::ATTR_ERRMODE", PDO::ERRMODE_EXCEPTION);
    up
    -2
    marcos at marcosregis dot com
    16 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:
    <?php
    // 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

    ?>

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

    $pdo->setAttribute(PDO::ATTR_AUTOCOMMIT,FALSE);
    // or
    $pdo->beginTransaction();

    // now we are ready to query DataLinks
    ?>

    To use DataLinks on oci just use OCI_DEFAULT on oci_execute() function;
    add a note add a note
    To Top