Posted on 2004-08-22
Medium Priority
Last Modified: 2013-12-12
I am having a problem using jpgraph with some php code.
FIrstly, the php script gets some data from mssql, then displays relevant data on a page
WHere the problem is, is i am calling an external .php to build the jpgraph graphs and i keep getting  image placeholders.  Im guessing this is because the headers for the page have already been sent.  Heres some code:

  $bat_cur = 0;
  $lamp_cur = 0;
  $array_vol = 0;
  $mains_vol = 0;
  $bat_vol = 0;
$image = "fig1.php?name=B.Curr&val=$bat_cur&min=0&max=10";
require ('globals.inc');
$result = mssql_query("SELECT     TOP 1 SAT24R3.[Main Lamp Fail], SAT24R3.[Standy Lamp Fail], SAT24R3.[Inverter Fail], SAT24R3.[Mains Power Fail], SAT24R3.[Generator Fail],
                      SAT24R3.[Photo Cell Fail], SAT24R3.[Fuel Level Low], SAT24R3.[Security Door Open],
                      SAT24R3.[Rotation RPM], SAT24R3.[Battery Volts], SAT24R3.[Mains Volts], SAT24R3.[Array Volts], SAT24R3.[Lamp Current], SAT24R3.[Battery Current],
FROM         ST_Terminal_CommonName_Table INNER JOIN
                      DapDeliverMessage ON ST_Terminal_CommonName_Table.TerminalID = DapDeliverMessage.TerminalSubscriptionID INNER JOIN
                      SAT24R3 ON DapDeliverMessage.ID = SAT24R3.DapDeliverMessageID
ORDER BY DapDeliverMessage.ReceivedTimestamp DESC");
while ($data = mssql_fetch_array($result)) {
  $main_lamp = $data['0'];
  $standby_lamp = $data['1'];
  $inverter = $data['2'];
  $main_power = $data['3'];
  $generator = $data['4'];
  $photo_cell = $data['5'];
  $fuel_low = $data['6'];
  $door = $data['7'];
  $bat_cur = $data['13'];
  $lamp_cur = $data['12'];
  $array_vol = $data['11'];
  $mains_vol = $data['10'];
  $bat_vol = $data['9'];
  $rotation = $data['8'];

print ("

<table border =\"1\" font face=\"tahoma\" size=\"2\" width = \"50%\">
<td><img src=\"fig1.php?name=B.Curr&val=$bat_cur&min=0&max=10&min=0&max=10\" border=0 align=center></td>
<td><img src=\"fig1.php?name=L.Curr&val=$lamp_cur&min=0&max=10\" border=0 align=center></td>
<td><img src=\"fig1.php?name=Array&val=$array_vol&min=0&max=10\" border=0 align=center></td>
<td><img src=\"fig1.php?name=Mains&val=$mains_vol&min=0&max=10\" border=0 align=center></td>
<td><img src=\"fig1.php?name=B.Volt&val=$bat_vol&min=0&max=10\" border=0 align=center></td>
<td><img src=\"fig1.php?name=Rot.RPM&val=$rotation&min=0&max=10\" border=0 align=center></td>

<td align=\"center\"><font face=\"tahoma\" size=2\">$bat_cur</td>
<td align=\"center\"><font face=\"tahoma\" size=2\">$lamp_cur</td>
<td align=\"center\"><font face=\"tahoma\" size=2\">$array_vol</td>
<td align=\"center\"><font face=\"tahoma\" size=2\">$mains_vol</td>
<td align=\"center\"><font face=\"tahoma\" size=2\">$bat_vol</td>
<td align=\"center\"><font face=\"tahoma\" size=2\">$rotation</td>
<table border =\"1\" font face=\"tahoma\" size=\"2\" width = \"50%\">
<td>Main Lamp</td><td><img src=\"$main_lamp.gif\"><br></td>
<td>Standby Lamp</td><td><img src=\"$standby_lamp.gif\"></td>
<td>Inverter</td><td><img src=\"$inverter.gif\"></td>
<td>Main Power</td><td><img src=\"$main_power.gif\"></td>
<td>Generator</td><td><img src=\"$generator.gif\"></td>
<td>Photo Cell</td><td><img src=\"$photo_cell.gif\"></td>
<td>Fuel Low</td><td><img src=\"$fuel_low.gif\"></td>
<td>Security Door</td><td><img src=\"$door.gif\"></td>



$name = $_GET['name'];
$datay[] = $_GET['val'];
$minval = $_GET['min'];
$maxval = $_GET['max'];
include ("globals.inc");
include ("JPGraph/jpgraph.php");
include ("JPGraph/jpgraph_bar.php");

// Create the graph. These two calls are always required
$graph = new Graph(35, 150,"auto");    

// Setup margin and titles

// Create the bar plot
$bplot = new BarPlot($datay);

// Setup color for gradient fill style

// Set color for the frame of each bar

// Add the plot to the graph


// Display the graph

Basically it displays an indicator graph for each of the values from the database.
Can someone help me out on this?
Question by:maunded
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LVL 48

Expert Comment

ID: 11867586
Does the image display correctly when you open it in a new window (right-click on the image -> copy link location, open that url in a new window) and see if there are any PHP-errors or something else which prevents the display of the image) Or is the image displayed correctly in that window?

Author Comment

ID: 11867589
If I right click and do Show Image it is OK

Author Comment

ID: 11869138
Its OK, I furgured that I need to use a function to create each of the graphs before I pass any data to the browser.
Not sure how I close an open question now tho???
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LVL 48

Expert Comment

ID: 11869402

Author Comment

ID: 11876639
I solved this problem by instead of calling an external file (fig1.php) to build the graphs, i created a function in the main php code and put the fig1.php code into that, so before I output anything to the browser, I call the function which creates the graph images.
Hope this can help someone a little more patient than I :)

Accepted Solution

CetusMOD earned 0 total points
ID: 11920589
Closed, 500 points refunded.
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