如何使用星星显示比率值

i tried. but it not success full.. please give me solution..

php code

<?php
function getReviews($con){
        $sql = "SELECT * FROM review";
        $result = mysql_query($sql,$con);
        while ($row = mysql_fetch_array($result)) {
            echo "<div class=' col-md-12 comment-box'>";
            echo "<div class='left-comm col-md-2'>";
            echo "<img class='img-responsive' src='images/article/avatar3.png'>";
            echo "</div>";
            echo "<div class='right-comm col-md-6'>";
            echo "<p class='user-name'>".$row['email']."</p>";
            echo for ($i=0; $i <$row['rating'] ; $i++) { 
        echo "*";
    }"<br>";
            echo $row['review']."<br>";
            echo "</div>";
            echo "</div><br>";
?>

i want to display rate value using stars.in this function.

Change:

  echo for ($i=0; $i <$row['rating'] ; $i++) { 
        echo "*";
    }"<br>";

to:

for ($i=0; $i <$row['rating'] ; $i++) { 
    echo "*";
}
echo "<br />";