<?php
$score=75;
if($score < 50)
{echo 'grade 0';}
else if($score < 55)
{echo 'grade 1';}
else if($score < 60)
{echo 'grade 1.5';}
else if($score < 65)
{echo 'grade 2';}
else if($score < 70)
{echo 'grade 2.5';}
else if($score < 75)
{echo 'grade 3';}
else if($score < 80)
{echo 'grade 3.5';}
else{echo 'grade 4';}
?>
