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                # PDO::query PDO::query — 執行 SQL 語句,返回PDOStatement對象,可以理解為結果集(PHP 5 &gt;= 5.1.0, PECL pdo &gt;= 0.2.0) ## 說明 ### 語法 ``` public PDOStatement PDO::query ( string $statement ) ``` ``` public PDOStatement PDO::query ( string $statement , int $PDO::FETCH_COLUMN , int $colno ) ``` ``` public PDOStatement PDO::query ( string $statement , int $PDO::FETCH_CLASS , string $classname , array $ctorargs ) ``` ``` public PDOStatement PDO::query ( string $statement , int $PDO::FETCH_INTO , object $object ) ``` PDO::query() 在一個單獨的函數中調用并執行 SQL 語句, 返回結果集 (如果有),語句作為一個PDOStatement對象返回。 ## 參數 **statement** 要執行的SQL語句。 ## 返回值 如果成功,PDO::query()返回PDOStatement對象,如果失敗返回 FALSE 。 ## 實例 ### PDO::query實例 遍歷輸出結果集: ``` <?php function getFruit($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"; } } ?> ``` 以上輸出結果為: ``` 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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