Едининя тест ми фейлна. Това от типа на данните ли е, или закръгляне?

<?php

//You are given the coordinates of four points in the 2D plane. The first and the second pair of points form two
//different lines. Print the longer line in format &quot;(X1, Y1)(X2, Y2)&quot; starting with the point that is closer to the center of
//the coordinate system (0, 0) (You can reuse the method that you wrote for the previous problem). If the lines are of
//equal length, print only the first one.
    function Line($x1, $y1, $x2, $y2)
    {
        $length = sqrt(pow($x1-$x2, 2) + pow($y1-$y2, 2));    
        return $length;
    }
    function nearestPoint($x1, $y1, $x2, $y2)
    {
        $first = sqrt(pow($x1, 2) + pow($y1, 2));
        $second= sqrt(pow($x2, 2) + pow($y2, 2));
        if ($first <= $second)
        {
            printf("(%d, %d)(%d, %d)", $x1, $y1, $x2, $y2);
        }
        else
        {
            printf("(%d, %d)(%d, %d)", $x2, $y2, $x1, $y1);
        }
    }
  $x1=floatval(readline());
   $y1=floatval(readline());
   $x2=floatval(readline());
   $y2=floatval(readline());
   $k1=floatval(readline());
   $j1=floatval(readline());
   $k2=floatval(readline());
   $j2=floatval(readline());
  if(Line($x1, $y1, $x2, $y2)>Line($k1, $j1, $k2, $j2))
  {
//      echo Line($x1, $y1, $x2, $y2)."\n";
//      echo Line($k1, $j1, $k2, $j2)."\n";
//      echo "(".$x1.", ". $y1.")";
//      echo "(".$x2.", ". $y2.")";
      nearestPoint($x1, $y1, $x2, $y2);
  }
  else 
  {
//      echo Line($x1, $y1, $x2, $y2)."\n";
//      echo Line($k1, $j1, $k2, $j2)."\n";
//      
//      echo "(".$k1.", ". $j1.")";
//      echo "(".$k2.", ". $j2.")";
     nearestPoint($k1, $j1, $k2, $j2);

  }

Не виждам къде можфе да е грешката, идеи? Благодаря предварително!