AJAX帖子在服务器端是空的（PHP）

Question

I am making an AJAX request to a PHP controller, by using jQuery ajax, but when trying to get the posted data with PHP the $_POST is empty. Below is the actual function:

function GetSeriesForManufacturer(manuf) {
    selectedmanufacturer = manuf;
    //Make an AJax Call For Getting Series Of Manufacturer
    var series = null;
    $.ajax({
        type: "POST",
        url: url,
        data: "{manufacturer:'" + selectedmanufacturer + "'}",
        contentType: "application/json", //; charset=utf-8",
        dataType: "json",
        cache: false,
        async: false,
        success: function (response) {
            //remove loading gif
            $(".loading").hide();
            //Append Data
            AppendSeries($.parseJSON(response.text), selectedmanufacturer);
            //Custom Scrollbar Call
            $('.MatchingSeries ul').mCustomScrollbar();                        
        },
        error: function (XMLHttpRequest, textStatus, errorThrown) {  }
    });                         
}

Thanks in advance!

Answer 1

First, you don't need to stringify data. Just send object literal is ok.

data: {manufacturer: selectedmanufacturer},

Second, you don't need this line:

contentType: "application/json",