javascript variables to a server through ajax problem

My goal is to send data to the server through Ajax.

But the server doesn't receive data exactly.

Here is the code I wrote.

in javascript

var a = 1, b = 2, c = 3, d = 4, e = 5;
var f = { 'h':11, 'i':22, 'j':33};
$.ajax({
    type: 'POST',
    url: url,
    dataType: 'json',
    data: { 'a':a, 'b':b, 'c':c, 'd': d, 'e': e,'dataImportant': f},
    success: function(result){
        /* do something */
   开发者_JAVA技巧 },
    error: function(result){
        /* do something */
    }
});

in php

function getAjax(){
    $a = $this->input->post("a");
    $b = $this->input->post("b");
    $c = $this->input->post("c");
    $d = $this->input->post("d");
    $e = $this->input->post("e");
    $f = $this->input->post("dataImportant");
    echo "<pre>";
    print_r($f);
    echo "</pre>";
    return;
}

result:

<pre></pre>

I intended to get the data in the form of an array.

but it could not be reached well

what is my mistake?

Are a, b, c, d, etc... in your javascript defined variables? If not, and you are just palying:

var f = { h:'11', i:'22', j:'33'};
$.ajax({
    type: 'POST',
    url: url,
    dataType: 'json',
    data: { 'a':'a', 'b':'b', 'c':'c', 'd':'d', 'e':'e','f':'f' },
    success: function(result){
        /* do something */
    },
    error: function(result){
        /* do something */
    }
});

I think you don't need the quotes around your data declaration:

  data: { a:a, b:b, c:c, d:d, e:e, f:f},

The first letter defines what you are naming the value that follows.

{name:value, name:value}

You would only need the quotes around the value if you are defining it in the data declaration

data: {a:'a',b:'b',etc}

Try my first example and see if your php script can echo the sent values.