paster

<?php // (c) 2008 sh(a)isecure.cz

class myGoogleChart
{
  var $data = array();
  
  public function addPair($label, $value) {
    $this->data[$label] = $value;  
  }
  
  public function getImageUrl() {
    
    $keys = array();
    $vals = array();
    
    foreach($this->data as $key => $val) {
      $keys[] = $key;
      $values[] = $val; 
    }
    $maxValue = max($values);
    
    // A list of encoding characters to help later, as per Google's example
    $simpleEncoding = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';

    $chartData = "s:";
    for ($i = 0; $i < count($values); $i++) {
      $currentValue = $values[$i];
  
      if ($currentValue > -1) {
        $chartData.=substr($simpleEncoding,61*($currentValue/$maxValue),1);
      } else {
        $chartData.='_';
      }
    }
    
    //http://chart.apis.google.com/chart?cht=p3&chd=s:52,1367&chs=310x130&chl=Hello|World"
    return 'http://chart.apis.google.com/chart?cht=p3&chs=310x130&chd='.$chartData.'&chl='.implode('|',$keys);
  }
}
?>