$statement
, int $PDO::FETCH_CLASS
, string $classname
, array $ctorargs
)PDO::query() executes an SQL statement in a single function call, returning the result set (if any) returned by the statement as a PDOStatement object.
For a query that you need to issue multiple times, you will realize better performance if you prepare a PDOStatement object using PDO::prepare() and issue the statement with multiple calls to PDOStatement::execute().
If you do not fetch all of the data in a result set before issuing your next call to PDO::query(), your call may fail. Call PDOStatement::closeCursor() to release the database resources associated with the PDOStatement object before issuing your next call to PDO::query().
Note:
Although this function is only documented as having a single parameter, you may pass additional arguments to this function. They will be treated as though you called PDOStatement::setFetchMode() on the resultant statement object.
The SQL statement to prepare and execute.
Data inside the query should be properly escaped.
PDO::query() returns a PDOStatement object, or FALSE
on failure.
A nice feature of PDO::query() is that it enables you to iterate over the rowset returned by a successfully executed SELECT statement.
<?php function getFruit($conn) { $sql = 'SELECT name, color, calories FROM fruit ORDER BY name'; foreach ($conn->query($sql) as $row) { print $row['name'] . "\t"; print $row['color'] . "\t"; print $row['calories'] . "\n"; } } ?>
The above example will output:
apple red 150 banana yellow 250 kiwi brown 75 lemon yellow 25 orange orange 300 pear green 150 watermelon pink 90
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