<?php

// your code goes here

$measure = 6.99999999999999;
echo "Measure: " . floatval($measure) ."\n";
echo "Measure: " . floor($measure).'.'
     .sprintf("%04d",floor(($measure*10000)-floor($measure)*10000)) 
     ."\n";

$measure = 6.00099999999999999;
echo "Measure: " . floatval($measure) ."\n";
echo "Measure: " . floor($measure).'.'.sprintf("%04d",floor(($measure*10000)-floor($measure)*10000)) ."\n";