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html:

<!DOCTYPE html>

<html>

<head>

<?php header("content-type:text/html;charset=utf-8");?>

</head>

<body>

Name: <input type="text" name="name" id="name"/>

</form>

? ? ? ? var name=document.getElementById('name').value;

$("#btn").on("click", function () {

$.ajax({

type: "POST",

url: "PDO_insert.php",//url放的是當前頁面請求的后臺地址。

data:{name:name},

async:false,

dataType: "json",?

success: function (data) {

var result=data;

//var result = eval('[' data ']');

alert(result);

error: function () {

alert("請求失??！");

}

});

</script>

</body>

</html>

<?php?

$host = 'localhost';

$database = 'test';

$username = 'root';

$password = 'root';

$selectName = $_POST['name'];

$pdo = new PDO("mysql:host=$host;dbname=$database", $username, $password);//創(chuàng)建一個pdo對象

$pdo->exec("set names 'utf8'");//設置數(shù)據(jù)庫編碼

$sql = "select * from user where name = ?";

//$sql = "select * from user";

$stmt = $pdo->prepare($sql);

$rs = $stmt->execute(array($selectName));

if ($rs){

// PDO::FETCH_ASSOC 關聯(lián)數(shù)組形式

// PDO::FETCH_NUM 數(shù)字索引數(shù)組形式

while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {

global $name,$age;

$name = $row['name'];

$age = $row['age'];

}

$data='{name:"'.$name.'",age:"'.$age.'"}';

echo json_encode($data);? ?//打印出："{name:\"1\",age:\"1\"}"

為什么每次獲取的都是前一次查詢的數(shù)據(jù)？