我正在尝试在一个郊区的数据库中搜索所有属性。我已经读到它与HTML代码204有关，但我仍然不了解该做什么或真正意味着什么。我有一段时间没有做过任何JS或PHP了，所以这可能是一个很愚蠢的错误，但是我一生都无法解决。请帮忙！

这是我的JS代码：

function basicSearch(){

    //Connect Script to the PHP
    var urlLink = "basicSearch.php";
    //Get search parameters:
    var searchAreaBar = document.getElementById("searchAreaBar").value;

    //define the parameters to send to php
    var strParameters = "searchAreaBar="+searchAreaBar + "&sid=" + Math.random();

        // define the options for the AJAX request
        var objOptions = {
        // use method post
        method: "post",
        // use strParameters as the parameters
        parameters: strParameters,
        // if successfil call fuction(objXHR)
        onSuccess: function(objXHR) {

            // if objXHR. responseText = yes
            if(objXHR.responseText=='Yes'){

                alert("Success!");

            }
            else{

                alert("Error! No Properties Found!");

            }
        }
    }

    // define the AJAX request object
    var objRequest = new Ajax.Request(urlLink,objOptions);

}

这是我的PHP代码：

<?php

    //Link the username and password:
    $connect = mysqli_connect("localhost", "admin", "12345", "realestate") or die ('Connection to database failed: ' . mysql_error());
    //Extract variables for request parameters:
    extract($_REQUEST);

    //Define the query:
    $BasicSearch = "SELECT * FROM properties WHERE Suberb='$searchAreaBar'";
    //Run the query:
    $resDasicSearch = mysqli_query($BasicSearch) or die(mysql_error());
    //SET intCount to number of rows in result:
    $intCount = mysqli_num_rows($resDasicSearch);

    //If intCount is greater than 0:
    if($intCount > 0){
        //Echo Yes:
        echo "Yes";
    }
    else{

        //Echo no:
        echo "No";

    }

?>

提前致谢。