PDO::query

说明

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().

参数

返回值

PDO::query() returns a PDOStatement object.

范例

例子 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. <?php function getFruit($conn) {     $sql = 'SELECT name, colour, calories FROM fruit ORDER BY name';     foreach ($conn->query($sql) as $row) {         print $row['NAME'] . "\t";         print $row['COLOUR'] . "\t";         print $row['CALORIES'] . "\n";     } } ?> 上例将输出： 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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