Error::getLastCaller

public static Error::getLastCaller(array &$backtrace)

public static function getLastCaller(array &$backtrace) {
  // Errors that occur inside PHP internal functions do not generate
  // information about file and line. Ignore black listed functions.
  while (($backtrace && !isset($backtrace[0]['line'])) || 
    (isset($backtrace[1]['function']) && in_array($backtrace[1]['function'], static::$blacklistFunctions))) {
    array_shift($backtrace);
  }

  // The first trace is the call itself.
  // It gives us the line and the file of the last call.
  $call = $backtrace[0];

  // The second call gives us the function where the call originated.
  if (isset($backtrace[1])) {
    if (isset($backtrace[1]['class'])) {
      $call['function'] = $backtrace[1]['class'] . $backtrace[1]['type'] . $backtrace[1]['function'] . '()';
    }
    else {
      $call['function'] = $backtrace[1]['function'] . '()';
    }
  }
  else {
    $call['function'] = 'main()';
  }

  return $call;
}