PHP Manual
PDO
Prepares and executes an SQL statement without placeholders

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

Beschreibung

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().

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

Parameter-Liste

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.

Rückgabewerte

Returns a PDOStatement objectBei einem Fehler wird false zurückgegeben..

Beispiele

Beispiel #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";
}
?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

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

Siehe auch

PDO::exec() - Führt ein SQL-Statement aus und liefert die Anzahl der betroffenen Zeilen
PDO::prepare() - Prepares a statement for execution and returns a statement object
PDOStatement::execute() - Führt ein Prepared Statement aus