AJAX抓取和保存记录的问题

我正在使用ajax/jquery编写数据库保存/抓取表单。我有问题保存和抓取虽然。我的ajax总是失败，我不知道为什么。我知道这应该行得通。我将我的ajaxCall移动到它自己的函数中，在加载和提交时调用它，这就是事情似乎出错的时候。谁能告诉我哪里不对吗?我有我的jquery和php如下

JQUERY AJAX代码/

$(文档)时(函数(){

$('#submitBtn').on('click',function(event) {
    var formData = $('form').serialize();
    event.preventDefault();
    ajaxCall(formData);
}); //END OF .ON
function ajaxCall(formData) {
    $.ajax({
        url: "php/save.php",
        type: "POST",
        dataType: "json",
        //dataType: "string",
        data: formData,
        async: true,
        success: successCall,
        error: errorCall
    });
} //END OF AJAX CALL FUNCTION
function errorCall() {
    alert("There was an error with this request!")
}// END OF ERROR CALL FUNCTION
function successCall(data) {
    //var records = $.parseJSON();
    var record = "";
    console.log(data);
    /*$.each(data, function() {
        ID = this['ID'];
        NAME = this['NAME'];
        PHONE = this['PHONE'];
        ADDRESS = this['ADDRESS'];
        var html = "<tr><td>" + ID + "</td><td>" + NAME + "</td><td>" + PHONE + "</td><td>" + ADDRESS + "</td></tr>";
        $(html).appendTo("table");
    });*/
    //var jsonObject = $.parseJSON(data);   
    //alert("ajax call complete");
} //END OF SUCCESS CALL FUNCTION

});//结束。ready

class dbClass {

    private $host = "localhost";
    private $username = "root";
    private $password = "";
    private $schema = "formtest";
    public $dbCon;
    function __construct() {
        $this->dbCon = new mysqli($this->host,$this->username,$this->password,$this->schema);
        if ($this->dbCon->connect_error) {
            die("Issue Connecting: " . $dbCon->connect_errorno . "Error: " . $dbCon->connect_error);
        }
        //var_dump($dbCon);
    }
    function saveDBRecord($dbName, $dbPhone, $dbAddress) {
        //HOW TO FIGURE THIS OUT
        $query = $this->dbCon->prepare("INSERT INTO contact (contact_name,contact_phone,contact_address) VALUES (?,?,?)");
        $query->bind_param("sss",$dbName,$dbPhone,$dbAddress);
        //var_dump($query);
        $query->Execute();
        $recordData = $this->grabRecords();
        return $recordData;
    }
    function grabRecords() {
        $query = $this->dbCon->query("SELECT * FROM contact;");
        //var_dump($query);
        $data = array();
        $counter = 0;
        $i = 0;
        while($row = $query->fetch_row())
        {   
            $record = array(
                "ID" => $row[0],
                "NAME" => $row[1],
                "PHONE" => $row[2],
                "ADDRESS" => $row[3]
                );
        $data[] = $record;
        //$data[$i++] = "ID: {$row[0]} NAME: {$row[1]} PHONE: {$row[2]} ADDRESS: $row[3]";
        //$data .= "ID: {$row[0]} NAME: {$row[1]} PHONE: {$row[2]} ADDRESS: $row[3]";
        //$counter .= $counter;//var_dump($data);
        //$assoc = $query->fetch_all();
        //var_dump($assoc);
        //return $assoc;
        }
        //var_dump($data);
        return $data;
    }
    function __destruct() {
        $this->dbCon->close();
    }
} //END OF dbClass
$dbClassConnection = new dbClass();
/*function displayRecords($recordData) {
//var_dump($recordData[0]);
}*/
//$name = $_POST['name'];
//$phone = $_POST['phone'];
//$address = $_POST['address'];
//$name = "AutoInput";
//$phone = "AutoInput";
//$address = "AutoInput";
//var_dump($dbClassConnection);
if ($_POST['name'] == "" || $_POST['phone'] == "" || $_POST['address'] == "") {
    $recordData = $dbClassConnection->grabRecords()
    echo json_encode($recordData);
    //echo json_encode("HELLO");
    //$recordData = $dbClassConnection->grabRecords();
    //echo json_encode("FIRST IF");
    //var_dump($recordData);
} else {
    $name = $_POST['name'];
    $phone = $_POST['phone'];
    $address = $_POST['address'];
    $recordData = $dbClassConnection->saveDBRecord($name,$phone,$address);
    //$jsonData = displayRecords($recordData);
    //var_dump(json_encode($recordData);
    echo json_encode($recordData);
    //var_dump($jsonData);
    //echo json_encode("SECOND IF");
    //var_dump($recordData);
}
//$name = $_POST['name'];
//ar_dump($name;
//echo json_encode($_POST);
//IF SUBMIT TRUE
//saveDBRecord and grabRecords
//ELSE
//JUST GrabRecords

?>