ajax post with jQuery

Is it possible to submit with POST method an ID when an element is clicked? I think jQuery has a built in AJAX fanction...

<span id="su开发者_Python百科bmitThisID"></span>

$('#submitThisId').click(function() {
  $.post("postTo.php", { id: $(this).attr('id') }, function(response) {
    alert(response);
  });
});

This will post your id to postTo.php and can be retrieved using: $id = $_POST['id'];

Whatever the postTo.php file returns will be alerted to the screen (response).

EDIT: To submit to the same page and do some server-side actions (db query, etc) you would only need to put something similar to the following code at the top of your page:

<?php 
  if (isset($_POST['id'])) {
    $id = $_POST['id'];
    // Perform some db queries, etc here
    $response = 'Format a response here'; // Format a response

    // This will return your formatted response to the $.post() call in jQuery 
    return print_r($response);
  } 
?>

When that "response" (text, html, etc) is returned to jQuery, you can use simple jQuery to insert it into the page where necessary and change the look of the page.

#submitThisID.post(
    'http://example.com/',
    {
        'foo': 'bar',
    },
    function (data) {
        console.log( 'data: ' + data );
    }
);

It's definitely possible: $.post().

However, your question doesn't make sense. Submitted values in HTTP posts take on name/value pairs. An example POST body might look like this:

Name: Jonathan Doe
Age: 23

Would the element ID be name, or the value? What would the other one be?

Yes, have a read of this: http://api.jquery.com/jQuery.post/

              $('#submitThisID').click(function({
                 var id = $(this).attr('id');
                 $.ajax({
                    url:'/index.php/ajax/',
                    type:'post',
                    dataType:'json',
                    data:{
                        id:id;
                    },
                    success:function(data){
                       console.log('ajax success!');
                    }
                 });
             });