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
Description
$query, ?int $fetchMode = PDO::FETCH_COLUMN, int $colno): PDOStatement|falsestring
$query,?int
$fetchMode = PDO::FETCH_CLASS,string
$classname,array
$constructorArgs): PDOStatement|false
$query, ?int $fetchMode = PDO::FETCH_INTO, object $object): PDOStatement|falsePDO::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().
Note:
If the
querycontains placeholders, the statement must be prepared and executed separately using PDO::prepare() and PDOStatement::execute() methods.
Parameters
-
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.
Return Values
Returns a PDOStatement object or false on failure.
Examples
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";
}
?>
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
See Also
- PDO::exec() - Execute an SQL statement and return the number of affected rows
- PDO::prepare() - Prepares a statement for execution and returns a statement object
- PDOStatement::execute() - Executes a prepared statement
