I've posted this before but, did not get an answer. My environment has many applications that are in directories that are symbolic links off the DOCUMENT_ROOT. So, off the DOCUMENT_ROOT I have the KoolPHPSuite directory. I've set up a file named gvars.php (gloabl variabes) that is based on the /Resources/runexample.php file. But, with full paths so that any symbolically linked directory (application) can find the KoolControls.
[DOCUMENT_ROOT] = "/var/www"
gavrs.php looks like this:

<?php
error_reporting(E_ERROR);
ob_start();
session_start();
   //Global vars - NEVER end a directory variable's value with a slash!
   $rootFolder             = $_SERVER['DOCUMENT_ROOT'];         // /var/www
   $ks                     = "$rootFolder/KoolPHPSuite";   
   //$kc                     = "$rootFolder/KoolControls";   
   $kc                     = "$ks/KoolControls";   
   $KoolControlsFolder     = "$kc";
   $controlsURL            = "$kc";
   $cssURL                 = "$ks/Resources/css";
   $resourcesURL           = "$ks/Resources";
   //$rootURL                = "$kc/index.php";  //maybe not necessary ?
   $rootURL                = "$kc";  //maybe not necessary ?
   $xmlControls            = "$ks/controls.xml";
   $imgURL                 = "$ks/Resources/images";
//------------------------------------------------------------------------------------
// Maybe not necessary stuff?
   //$installURL             = "$ks/Install"; //maybe   //? maybe Not necessary
   //$controlImgUrl          = "$resourcesURL/Images";  //Capitol I only in Examples/control directory
   //$xmlNav                 = "$ks/Examples/navigation.xml";  //Only used in Examples/[controlname] directory
   //$navURL                 = "../.."; //In control directory - KoolSuiteMenu - maybe Not necessary
   //$xmlExample             = "example.xml";  //? maybe Not necessary
   //$example                = array();        //? maybe Not necessary
   
echo "        rootFolder= $rootFolder<br>";  //For interrogation
echo "                ks= $ks<br>";
echo "                kc= $kc<br>";
echo "KoolControlsFolder= $KoolControlsFolder<br>";
echo "           rootURL= $rootURL<br>";
echo "       xmlControls= $xmlControls<br>";
echo "       controlsURL= $controlsURL<br>";
echo "            cssURL= $cssURL<br>";
echo "            imgURL= $imgURL<br>";
echo "        installURL= $installURL<br>";
echo "     controlImgUrl= $controlImgUrl<br>";
   
   //$xmlOverview   = "../../overview.xml";  //In Examples/control directory - maybe Not necessary
   
//Maybe useful - keep
   //Check PHP version
   if(phpversion() < 5)
      header("Location: $resourcesURL/err.html");
      
   //load database infomation
   include($resourcesURL.'/config.php');
?> 

http://localhost/dwulkan/kool/treeview.php Code :

<?php
include "/var/www/KoolPHPSuite/gvars.php";
    require $KoolControlsFolder."/KoolAjax/koolajax.php";
    require $KoolControlsFolder."/KoolTreeGrid/kooltreegrid.php";
    $info = array(
        'id' => 'KoolTreeGrid1',
        'width' => '780px',
        'columns' => array(
            array(
                'field' => 'prop',
                'headerText' => 'Property',
                'width' => '250px',
            ),
            array(
                'field' => 'defaultValue',
                'headerText' => 'Default Value',
                'width' => '120px',
            ),
            array(
                'field' => 'value',
                'headerText' => 'Example Value',
                'width' => '120px',
                'columnEdit' => TRUE,
            ),
            array(
                'field' => 'type',
                'headerText' => 'Type',
                'width' => '50px',
            ),
            array(
                'field' => 'desc',
                'headerText' => 'Description',
            ),
        ),
        'rootIndent' => 20,
        'treeIndent' => 19,
    );
    
    $treeGrid = KoolTreeGrid::newTreeGrid($info);
    
    $rows = KoolTreeGrid::csvToArray('data.csv', ';');
    $metaField = 'meta';
    $rows = KoolTreeGrid::csvToArray('data.csv', ';');
    foreach ($rows as & $row) 
        foreach ($row as $field => & $value)
            if ($field===$metaField) 
                $value = json_decode($value, true);
    
    $treeGrid->addSetting(array(
        'ArrayData' => $rows,
        'idField' => 'id',
        'parentField' => 'parentId',
        'metaField' => $metaField,
    ));
    
    $treeGrid->process();
?>
 
<html><body>
<form id="form1" method="post">
    <?php 
        //Render Ajax functions for KoolTreeView
        echo $koolajax->Render();
    ?>
    <?php 
        echo $treeGrid->render();
    ?>
</form>
</body></html>

When I go to http://localhost/dwulkan/kool/treeview.php, I see this and no page?

rootFolder= /var/www
ks= /var/www/KoolPHPSuite
kc= /var/www/KoolPHPSuite/KoolControls
KoolControlsFolder= /var/www/KoolPHPSuite/KoolControls
rootURL= /var/www/KoolPHPSuite/KoolControls
xmlControls= /var/www/KoolPHPSuite/controls.xml
controlsURL= /var/www/KoolPHPSuite/KoolControls
cssURL= /var/www/KoolPHPSuite/Resources/css
imgURL= /var/www/KoolPHPSuite/Resources/images
installURL=
controlImgUrl= 

And when I view source, for some reason the AJAX src= is incorrect:

        rootFolder= /var/www<br>                ks= /var/www/KoolPHPSuite<br>                kc= /var/www/KoolPHPSuite/KoolControls<br>KoolControlsFolder= /var/www/KoolPHPSuite/KoolControls<br>           rootURL= /var/www/KoolPHPSuite/KoolControls<br>       xmlControls= /var/www/KoolPHPSuite/controls.xml<br>       controlsURL= /var/www/KoolPHPSuite/KoolControls<br>            cssURL= /var/www/KoolPHPSuite/Resources/css<br>            imgURL= /var/www/KoolPHPSuite/Resources/images<br>        installURL= <br>     controlImgUrl= <br>  
<html><body>
<form id="form1" method="post">
    
<!--KoolAjax version 3.0.0.0 - www.koolphp.net -->
<script type='text/javascript' src='oolControls/KoolAjax/koolajax.php?32981a13284db7a021131df49e6cd203'> </script>    

Why is the src= not picking up the full path?