title: Javascript/PHP Family Tree Builder with Multiple Parents
body: <p>Is there an existing PHP, Javascript, or even command line tool that can build a family tree in HTML (preferably) or at the very least create an image for it?  Multiple parents are a requirement.  I have been googling this for hours, but to no avail.</p>
  
  <p>For instance, the <a href="http://code.google.com/apis/visualization/documentation/gallery/orgchart.html" rel="noreferrer">Google Organizational Chart</a> would be ideal, but it only allows each node to have at most one parent.  I need two parents to be possible.</p>
  
  <p>Whatever this website does would also be perfect: <a href="http://www.familyecho.com/#edit:START" rel="noreferrer">http://www.familyecho.com/</a>, but it seems to not be done with javascript and they don't publish the code that actually creates the visualization.</p>
  
  <p>Even connecting to an external website to use their API to generate a visualization would be perfect.</p>