Custom JavaScript Object key

Question

I am trying to modify the key for an AJAX POST within jQuery. If I replace the key with a variable, it seems to use the literal variable name instead of the value within.

$key = $(this).attr('id');

$.post( "php/register.php", { $key : $(this).val() }).done(function( data ) {

If the attribute was email I would expect to see:

email =>
string(15) "email@email.com"

Instead I get:

["$key"]=>
string(15) "email@email.com"

Does anybody know if what I'm trying to achieve is possible and how it can be done?

Answer 1

You can't use variables as a property like this. One alternative:

var data = {};
data[$key] = $(this).attr('id');

Then send the data

Answer 2

您必须在ajax帖子中传递要在php中处理的变量，将$ key替换为'email'。