<body>
<?php
$score=89;
if($score<50){
echo 'grade 0';
}else if($score<56){
echo'grade 1';
}else if($score<60){
echo'grade 1.5';
}else if($score<66){
echo'grade 2';
}else if($score<70){
echo'grade 2.5';
}else if($score<76){
echo'grade 3';
}else if($score<80){
echo'grade 3.5';
}else{
echo'grade4';
}
?>
</body>
</html>
