Send form data with jquery ajax json

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I\'m new in PHP/jquery I would like to ask how to send json data from a form field like (name, age, etc) with ajax in a json format. Sadly I can\'t found any relevant inform

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4条回答

傲寒

2020-12-03 06:07

You can use serialize() like this:

$.ajax({
  cache: false,
  url: 'test.php',
  data: $('form').serialize(),
  datatype: 'json',
  success: function(data) {

  }
});

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失恋的感觉

2020-12-03 06:09

here is a simple one

here is my test.php for testing only

<?php

// this is just a test
//send back to the ajax request the request

echo json_encode($_POST);

here is my index.html

<!DOCTYPE html>
<html>

<head>

</head>
<body>

<form id="form" action="" method="post">
Name: <input type="text" name="name"><br>
Age: <input type="text" name="email"><br>
FavColor: <input type="text" name="favc"><br>
<input id="submit" type="button" name="submit" value="submit">
</form>




<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script>
    $(document).ready(function(){
        // click on button submit
        $("#submit").on('click', function(){
            // send ajax
            $.ajax({
                url: 'test.php', // url where to submit the request
                type : "POST", // type of action POST || GET
                dataType : 'json', // data type
                data : $("#form").serialize(), // post data || get data
                success : function(result) {
                    // you can see the result from the console
                    // tab of the developer tools
                    console.log(result);
                },
                error: function(xhr, resp, text) {
                    console.log(xhr, resp, text);
                }
            })
        });
    });

</script>
</body>
</html>

Both file are place in the same directory

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忘了有多久

2020-12-03 06:14
Sending data from formfields back to the server (php) is usualy done by the POST method which can be found back in the superglobal array $_POST inside PHP. There is no need to transform it to JSON before you send it to the server. Little example:
```
<?php

if($_SERVER['REQUEST_METHOD'] == 'POST')
{
    echo '<pre>';
    print_r($_POST);
}
?>
<form action="" method="post">
<input type="text" name="email" value="joe@gmail.com" />
<button type="submit">Send!</button>
```
With AJAX you are able to do exactly the same thing, only without page refresh.
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忘了有多久

2020-12-03 06:15
The accepted answer here indeed makes a json from a form, but the json contents is really a string with url-encoded contents.

To make a more realistic json POST, use some solution from Serialize form data to JSON to make formToJson function and add contentType: 'application/json;charset=UTF-8' to the jQuery ajax call parameters.
```
$.ajax({
    url: 'test.php',
    type: "POST",
    dataType: 'json',
    data: formToJson($("form")),
    contentType: 'application/json;charset=UTF-8',
    ...
})
```
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