PDO查询数据简单示例

$atime=5;
$pdo=new PDO('mysql:host=127.0.0.1;dbname=test1','root','root');
$stmt=$pdo->prepare('select * from test where atime>:atime');
$stmt->bindParam(':atime',$atime);
$stmt->execute();
 
$stmt=$pdo->prepare('select * from test where atime>:atime');
$stmt->bindParam(':atime',$atime);
$stmt->execute();
 
//查询单条数据
$a=$stmt->fetch(PDO::FETCH_ASSOC);//关联数组print_r($a);
$a=$stmt->fetch(PDO::FETCH_LAZY);//只能用于单条查询
//PDORow Object
//(
//      [queryString] => select * from test where atime>:atime
//      [id] => 7
//      [aname] => aa
//      [atime] => 23
//)
 
//查询多条数据
$a=$stmt->fetchAll(PDO::FETCH_ASSOC);//关联数组
//索引键
$a=$stmt->fetchAll(PDO::FETCH_NUM);//索引键
//既有索引键也有关联键
$a=$stmt->fetchAll(PDO::FETCH_BOTH);//既有索引键也有关联键
 
Array
//(
//    [0] => Array
//    (
//        [id] => 7
//            [0] => 7
//            [aname] => aa
//[1] => aa
//[atime] => 23
//            [2] => 23
//        )
//
//    [1] => Array
//(
//    [id] => 8
//            [0] => 8
//            [aname] => aa
//[1] => aa
//[atime] => 23
//            [2] => 23
//        )

转载来自:https://www.cnblogs.com/lizhaoa/p/7766448.html