call trace php

function generateCallTrace() {
  $e = new \Exception();
  $trace = explode("\n", $e->getTraceAsString());
  // reverse array to make steps line up chronologically
  $trace = array_reverse($trace);
  array_shift($trace); // remove {main}
  array_pop($trace); // remove call to this method
  $length = count($trace);
  $result = array();

  for ($i = 0; $i < $length; $i++)
  {
    $result[] = ($i + 1)  . ')' . substr($trace[$i], strpos($trace[$i], ' ')); // replace '#someNum' with '$i)', set the right ordering
  }

  return "\t" . implode("\n\t", $result);
}