$.post到PHP文件-在包含循环完成之前不会调用回调

我正在制作一个库存表，用户可以在其中输入要出库的库存数量，这个功能是为表中的每个成员验证数据库中的库存数量是否足以出库。

当我在Chrome上中断代码时，它似乎永远不会碰到$.post的内部代码，直到它完成了对表的循环。到那时，本应传递给AddIssue的数据只变为1和10，而不是其他数据。

这开始让我发疯了，所以我很感激能在这里指出我做错了什么

var issueArray =[];
function VerifyIssue()
{
    var numRows = document.getElementById("searchTable").rows.length - 2;
    var running = true;
    var str1 = "issue_";
    while(running == true)
    {
        if (numRows < 0 && running == true)
        {
            running = false;
            //insert code for success
            break;
        }
        else if (running == false)
        {
            break;
        }
        var str2 = numRows;
        var comb = str1.concat(str2);
        var issue_element = document.getElementById(comb);
        var q = issue_element.value;

        var i = issue_element.name;
        var idd = i.replace("issue_", "");
        var trimId = idd.trim();
        $.post
        (
            'includes/issueCheck.php',
            {
                id: trimId, 
                issueQuantity: q 
            },
            function(result)
            {
                alert(result);
                if (result < 0)
                {
                    alert("One of more quantities inputted are greater than held in stock");
                    running = false;
                }
                if (result > 0)
                {
                    addIssue(trimId, q);
                }
            }
        );
        numRows = numRows - 1;
    }
    alert(issueArray);
}
function addIssue(issueID, quant)
{
    var item = {};
    item.label = issueID;
    item.value = quant;
    issueArray.push(item);
}

这是$.post 调用的PHP

<?php
    $server = 'SQL2008';
    $connectionInfo = array( "Database"=>"rde_470585");
    $conn = sqlsrv_connect($server,$connectionInfo);
    $false = -1;
    $true = 1;
    $id = $_POST['id'];
    $quantity = $_POST['issueQuantity'];
    $query = "Select Quantity FROM Stock WHERE StockID = ?";
    $param = array($id);
    $res = sqlsrv_query($conn, $query, $param);
    $row =  sqlsrv_fetch_array($res, SQLSRV_FETCH_ASSOC);
    $dbQuantity = $row['Quantity'];
    if ($dbQuantity < $quantity)
    {
        echo $false;
    }
    else if($dbQuantity >= $quantity)
    {
        echo $true;
    }