怎么样获取一行数据呢和所有的数据的行数呢？

我加上了 $myrow = mysql_fetch_row($res);这一句想获取一行数据 为什么获取不到一行 提示这个 ( ! ) Warning: mysql_fetch_row() expects parameter 1 to be resource, array given in D:\wamp\www\chaxun.php on line 7

<?php
 $pdo=new PDO("mysql:host=localhost;dbname=t1","root","");
 $stmt=$pdo->prepare("select * from test");
 $stmt->execute();
 //$myrow = mysql_fetch_row($stmt->execute());
 $res=$stmt->fetch();
 $myrow = mysql_fetch_row($res);
 print_r($myrow);
?>

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要用while循环取吧

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PDOStatement::rowCount — 返回受上一个 SQL 语句影响的行数

PDOStatement::fetch — 从结果集中获取下一行

<?php
$pdo = new PDO('mysql:host=127.0.0.1;dbname=test;charset=utf8', 'root', 'root');

$query = $pdo->query('SELECT * from users');
//获取一行
$result=$query->fetch();

print_r($result);

$total = $pdo->query('SELECT * from test');
//统计条数
$count=$total->rowCount();

echo $count;