Plotting Graph with flot

flot

I want to plot graph using flot and mysql but an exception occurs

getData.php

       $sql = mysql_query("SELECT count(Msg_ID) as msgCount,From_user
                           FROM Messages
                           GROUP BY From_user");

            echo "[";
  while($result = mysql_fetch_array($sql))
  {
     //print_r($result);
     echo "[".$result['msgCount'].",".$result['From_user']."]"."\n";

   }

    echo "]";

And for plotting

<div id="plotarea"  style="width:600px;height:300px;">

                    <script type="text/javascript">

            var options = {
                    lines: { show: true },
                    points: { show: true },
                    xaxis: { min:0,max:5 },
                    yaxis: { min:1  ,max:60},
               };

    $.ajax({
                            url:"getData.php",
                            type:"post",
                            success:function(data)
                            {
                                    alert(data);
                                    $.plot($("#plotarea"),data,options);
                                    //alert(data);
                            }
                    })
                    </script>

    </div>

What is wrong with this code?
Next I want to plot graph with one of the axis is time.

Best Solution

 $sql = mysql_query("SELECT count(Msg_ID) as msgCount,From_user
                           FROM Messages
                           GROUP BY From_user");

  while($result = mysql_fetch_array($sql))
  {
     $user_data[] = array($result['msgCount'],$result['From_user']);
  }

  echo json_encode($user_data);

The above will eliminate issues with comma separation (which, from what I can tell, you never resolved).

Next, the javascript:

  <script type="text/javascript">
    $(function () {
            var options = {
                    lines: { show: true },
                    points: { show: true },
                    xaxis: { min:0,max:5 },
                    yaxis: { min:1  ,max:60},
               };

    $.get("getData.php", function(data){
                            $.plot($("#plotarea"),data,options);
                         }, 
                json);
    });
   </script>

Notice that I changed $.ajax to $.get, since you weren't passing any data from the page to the script, a post is not necessary. And if you use $.get, all of the setting names are assumed.

Also notice that I pulled the script out of the html and put it within the jquery window.onload syntax : $(function () { . This would go in the head of your html.

From what I can tell, you aren't really in need of ajax, since you didn't define any sort of event that would trigger the $.ajax function. It looks like you are using ajax to call a script when you could just put the script into the same script that loads the page, like:

 <?php
 $sql = mysql_query("SELECT count(Msg_ID) as msgCount,From_user
                           FROM Messages
                           GROUP BY From_user");

  while($result = mysql_fetch_array($sql))
  {
     $user_data[] = array($result['msgCount'],$result['From_user']);
  }
  ?>

  <script type="text/javascript">
    $(function () {
            var options = {
                    lines: { show: true },
                    points: { show: true },
                    xaxis: { min:0,max:5 },
                    yaxis: { min:1  ,max:60},
               };

     var userposts = <?php echo json_encode($user_data); ?>;

     $.plot($("#plotarea"),userposts,options);

   </script>      
   <style type="text/css">
   #plotarea {
        width: 600px, height: 300px;
   }
   </style>
   </head>
   <body>
   .....//Put whatever before the div
   <div id="plotarea"></div>
   .....//Finish up the page.
Related Question