<?php

header("Content-type:text/html;charset=utf8");

$password=$_POST["password"];

$username=$_POST["username"];

try{

$dsn="mysql:host=localhost;dbname=test";

$user="root";

$pass="360wmlssw";

$pdo=new PDO($dsn,$user,$pass);

$sql="delete * from test where user=:username and password=:password";

    $stmt=$pdo->prepare($sql);

$stmt->bindParam(":username",$username);

$stmt->bindParam(":password",$password);

$stmt->execute();

echo $stmt->rowCount();

}

catch(PDOException $e)

{

echo $e->getMessage();

}

//各位大神，为什么我的语句输出为0啊，我的数据库有这条记录啊