PHP + Javascript 父函数没有被调用

Question

好吧，我已经尝试寻找这个问题的答案几个小时了，但我自己无法解决。 我试图从 PHP 函数调用 Javascript 父函数，但是它没有被调用。 当使用 onclick 方法 onclick='parent.dosomething(); 时，一切似乎都工作正常，但如果我尝试通过 echo 来调用该函数，它就会因某种原因失败。

echo "<script>parent.reloadprofmessages();</script>"; //this is what is not getting called

这是 PHP 函数：

function checkactivity($username)
{
    //These are just queries being executed (irrelevant)

    $querystats = "SELECT users.fullname, activity.id, activity.sender, activity.receiver, activity.type, activity.dateposted, activity.seen, activity.related FROM activity, users WHERE activity.receiver = '$username' && activity.seen = '0' ORDER BY id DESC LIMIT 1";
    $resultstats = mysql_query($querystats);
    $num_stats = mysql_num_rows($resultstats);
    $rowactivity = mysql_fetch_assoc($resultstats);

    //End of queries

    if($num_stats > 0) //If there are registries
    {
        $user = $_SESSION['Username'];

        $activity_date = $rowactivity["dateposted"];
        $activity_type = $rowactivity["type"];
        $activity_sender = $rowactivity["sender"];
        $timeactivity = strtotime( "$activity_date" );
        $actualtime = time();

        $timetoseconds = $actualtime - $timeposted; 
        $timetominutes = floor($timepassedtoseconds/60);

        if($timetominutes < 2)
        {
            if($activity_sender != $user)
            {
                if($activity_type == 1) //Messages
                {
                    echo "<script>parent.reloadprofmessages();</script>"; //this is what is not getting called
                }
            }
        }

    }
}

这是我在父页面的 Javascript 函数：

function reloadprofmessages()
{
    $('#friendrequests').load('showprofmessages.php?username=<?php echo $actualuser; ?>').fadeIn("slow");
} //refreshes messages

我在 Google Chrome 中按 CTRL + Shift + I 进入开发人员工具，网络 > 。执行调用 PHP 函数的请求的页面 >预览，这就是我收到的： 但是，该函数没有被调用。 解决这个问题会解决我很多问题，对我来说，知道为什么它不起作用实际上仍然是一个谜，因为它在其他情况下起作用。 提前感谢您的帮助。

Answer 1

获取 javascript 并使用 AJAX 执行它并不是一个好主意。我建议首先将你的 PHP 更改为：

if($activity_type == 1) //Messages
{
    echo "1";
}
else {
    echo "0";
}

然后将你的 Javascript 更改为：

function reloadprofmessages()
{
    var can_reload = $.ajax({ url: "showprofmessages.php?username=<?php echo $actualuser; ?>" });
    if (can_reload) {
        parent.erloadprofmessages();
    }
}

希望有帮助

Answer 2

添加 script 标签的 type 属性

echo "<script type='text/javascript' >parent.reloadprofmessages();</script>"; 

，并记住在此行之前定义 javascript 函数

Answer 3

所以这是错误的：（显示错误）

function checkactivity($username)
{
    //These are just queries being executed (irrelevant)

    $querystats = "SELECT users.fullname, activity.id, activity.sender, activity.receiver, activity.type, activity.dateposted, activity.seen, activity.related FROM activity, users WHERE activity.receiver = '$username' && activity.seen = '0' ORDER BY id DESC LIMIT 1";
    $resultstats = mysql_query($querystats);
    $num_stats = mysql_num_rows($resultstats);
    $rowactivity = mysql_fetch_assoc($resultstats);

    //End of queries

    if($num_stats > 0) //If there are registries
    {
        $user = $_SESSION['Username'];

        $activity_date = $rowactivity["dateposted"];
        $activity_type = $rowactivity["type"];
        $activity_sender = $rowactivity["sender"];
        $timeactivity = strtotime( "$activity_date" ); //$timeactivity was not being used
        $actualtime = time();

        $timetoseconds = $actualtime - $timeposted; //$timeposted doesn't even exist, in other words I wasn't even converting the $activity_date timestamp to time.
        $timetominutes = floor($timepassedtoseconds/60);

        if($timetominutes < 2)
        {
            if($activity_sender != $user)
            {
                if($activity_type == 1) //Messages
                {
                    echo "<script>parent.reloadprofmessages();</script>"; //this was not the correct way of calling a function from the parent page.
                }
            }
        }

    }
}

关于 Javascript 函数：
这就是我的结论：

var auto_refresh = setInterval(
function reloadstring()
{
        $.get("checknewactivity.php?vprofile=<?php echo $actualuser; ?>", function(activity){
        if (activity == 1) 
        {
            $('#profcommentsdiv').load('showprofmessages.php?vprofile=<?php echo $actualuser; ?>').fadeIn("slow");
        }
        });
}, 1000); // refresh every 1000 milliseconds

现在它可以工作了，谢谢您的帮助，我真的很感激，像往常一样，在这里询问后我总是能找到更安全的解决方案。