我想我几乎已经对ajax是Wordpress的业务有了头绪，彻底了解了它，但我现在完全被难住了。

首先是那些讨厌的东西！我的主插件文件中有以下内容：

wp_enqueue_script( \'function\', plugin_dir_url( __FILE__ ) . \'function.js\', array( \'jquery\', \'json2\' ) );
wp_localize_script( \'function\', \'MyAjax\', array( \'ajaxurl\' => admin_url( \'admin-ajax.php\' ) ) );

add_action(\'wp_ajax_nopriv_pfxconversion\', \'pfxconversion\');

$(document).ready(function() {

    $("#convert").click(function () {
                var from = $("#from").val();
                var to = $("#to").val();
                var amount = $("#amount").val();

    //Make data string
     var dataString = "amount=" + amount + "&from=" + from + "&to=" + to;

         $.ajax({
           type: "POST",
           action: pfxconversion,
           url: MyAjax.ajaxurl,
           data: dataString,
           success: function(data){

           $(\'#result\').show();

            //Put received response into result div
            $(\'#result\').html(data);
           }
         });
    });
});

function pfxconversion () {
//Get Posted data
$amount = $_POST[\'amount\'];
$from = $_POST[\'from\'];
$to = $_POST[\'to\'];

//make string to be put in API
$string = "1".$from."=?".$to;

//Call Google API
$google_url = "http://www.google.com/ig/calculator?hl=en&q=".$string;

//Get and Store API results into a variable
$result = file_get_contents($google_url);

//Explode result to convert into an array
$result = explode(\'"\', $result);

################################
# Right Hand Side
################################
$converted_amount = explode(\' \', $result[3]);
$conversion = $converted_amount[0];
$conversion = $conversion * $amount;
$conversion = round($conversion, 2);

//Get text for converted currency
$rhs_text = ucwords(str_replace($converted_amount[0],"",$result[3]));

//Make right hand side string
$rhs = $conversion.$rhs_text;

################################
# Left Hand Side
################################
$google_lhs = explode(\' \', $result[1]);
$from_amount = $google_lhs[0];

//Get text for converted from currency
$from_text = ucwords(str_replace($from_amount,"",$result[1]));

//Make left hand side string
$lhs = $amount." ".$from_text;

################################
# Make the result
################################

echo $lhs." = ".$rhs;exit;
}

非常感谢您的帮助。

Edit 我现在在#result中得到了一个-1的值，在将我的js从$更改为jQuery之后-Firebug报告了一个错误（$不是函数）。

Edit 2 我很确定我现在已经完成了操作，但我仍然在#结果-1中获得了输出：

jQuery(document).ready(function() {

    jQuery("#convert").click(function () {
                var from = jQuery("#from").val();
                var to = jQuery("#to").val();
                var amount = jQuery("#amount").val();

    //Make data string
     var dataString = "amount=" + amount + "&from=" + from + "&to=" + to;

         jQuery.ajax({
           type: "POST",
           url: MyAjax.ajaxurl,
           data: "action=pfxconversion"&dataString, 
           success: function(data){
           jQuery(\'#result\').show();

            //Put received response into result div
            jQuery(\'#result\').html(data);
           }
         });
    });
});