ajax提交表单为什么它不能回显$ _POST [英] ajax submit form why it cannot echo $_POST
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问题描述
我正在使用ajax提交表单进行测试(向自己的页面"new1.php"提交)
I'm test using ajax submit form (submit to myself page "new1.php")
我想要的是，单击提交"按钮后，它将回显名字和姓氏.但是我不知道为什么提交后看不到名字和姓氏.
The thing that I want is, after click submit button, it will echo firstname and lastname. But I don't know why I do not see the firstname and lastname after submit.
这是new1.php页面
here is new1.php page
<?php
echo $_POST['firstname']."<br>";
echo $_POST['lastname']."<br>";
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
</head>
<body>
<form id="myform" action="new1.php" method="post">
Firstname : <input type="text" name="firstname"> <br>
Lastname : <input type="text" name="lastname"> <br>
<input type="submit" value="Submit">
</form>
<script>
// this is the id of the form
$("#myform").submit(function(e) {
$.ajax({
type: "POST",
url: 'new1.php',
data: $("#myform").serialize(), // serializes the form's elements.
success: function(data)
{
alert('yeah'); // show response from the php script.
}
});
e.preventDefault(); // avoid to execute the actual submit of the form.
});
</script>
</body>
</html>
推荐答案
在您的情况下，最好的选择是在PHP代码中使用json_encode以JSON格式检索值，然后通过数据对象访问这些值.
In your case the best option to retrieve values as JSON format using json_encode in your PHP code and then accessing these values through data object.
示例:
PHP代码:
if($_POST)
{
$result['firstname'] = $_POST['firstname'];
$result['lastname'] = $_POST['lastname'];
echo json_encode($result);
die(); // Use die here to stop processing the code further
}
JS代码:
$("#myform").submit(function (e) {
$.ajax({
type : "POST",
url : 'new1.php',
dataType : 'json', // Notice json here
data : $("#myform").serialize(), // serializes the form's elements.
success : function (data) {
alert('yeah'); // show response from the php script.
// make changed here
$('input[name="firstname"]').text(data.firstname);
$('input[name="lastname"]').text(data.lastname);
}
});
e.preventDefault(); // avoid to execute the actual submit of the form.
});
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