PHP + Javascript父函数未被调用

Question

Alright I've been trying to find an answer to this for hours already but I couldn't resolve it myself. I'm trying to call a Javascript parent function from a PHP function, however, it is not getting called. When using the onclick method onclick='parent.dosomething(); everything seems to work fine but if I try to call the function by echo'ing it out, it would just fail for some reason.

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

Here's the PHP function:

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
                }
            }
        }

    }
}

And this is my Javascript function at the parent page:

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

I pressed CTRL + Shift + I in Google Chrome to get to the developer tools, Network > page that does the request that calls the PHP function > Preview and this was what I received: <script>parent.reloadprofmessages();</script> However, the function is not getting called. Resolving this would solve me a lot of problems, to me it is actually still a mystery to know why it doesn't work since it has worked in other cases. Thank you for your help in advance.

Answer 1

It's not a good idea to fetch javascript and execute it with AJAX. What I would suggest is to firstly change your PHP to this:

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

Then change your Javascript to this:

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

Hope that helps