<head> kısmına:
<style>
.rated{
color:yellow;
}
span#s1{ color:magenta;}
</style><body> kısmına:
<span id="s1"><b>Simple Star Rating System<b></span>
<form action="" method="post">
<input type="text" name="rate">
<input type="submit" name="submit" value="Rate">
</form>
<br>
<?php
if(isset($_POST['submit']))
{
$value=$_POST['rate'];
if($value==1)
{?>
<span class="fa fa-star rated" style="font-size:24px"></span>
<span class="fa fa-star " style="font-size:24px"></span>
<span class="fa fa-star " style="font-size:24px"></span>
<span class="fa fa-star " style="font-size:24px"></span>
<span class="fa fa-star " style="font-size:24px"></span>
<?php
}
?>
<?php if($value==1.5)
{?>
<span class="fa fa-star rated" style="font-size:24px"></span>
<span class="fa fa-star-half rated " style="font-size:24px"></span> 
<span class="fa fa-star " style="font-size:24px"></span>
<span class="fa fa-star " style="font-size:24px"></span>
<span class="fa fa-star " style="font-size:24px"></span>
<?php
}
?>
<?php if($value==2)
{?>
<span class="fa fa-star rated" style="font-size:24px"></span>
<span class="fa fa-star rated " style="font-size:24px"></span>
<span class="fa fa-star " style="font-size:24px"></span>
<span class="fa fa-star " style="font-size:24px"></span>
<span class="fa fa-star " style="font-size:24px"></span>
<?php
}
?>
<?php if($value==2.5)
{?>
<span class="fa fa-star rated" style="font-size:24px"></span>
<span class="fa fa-star rated " style="font-size:24px"></span>
<span class="fa fa-star-half rated " style="font-size:24px"></span> 
<span class="fa fa-star " style="font-size:24px"></span>
<span class="fa fa-star " style="font-size:24px"></span>
<?php
}
?>
<?php if($value==3)
{?>
<span class="fa fa-star rated" style="font-size:24px"></span>
<span class="fa fa-star rated " style="font-size:24px"></span>
<span class="fa fa-star rated " style="font-size:24px"></span>
<span class="fa fa-star " style="font-size:24px"></span>
<span class="fa fa-star " style="font-size:24px"></span>
<?php
}
?>
<?php if($value==3.5)
{?>
<span class="fa fa-star rated" style="font-size:24px"></span>
<span class="fa fa-star rated " style="font-size:24px"></span>
<span class="fa fa-star rated " style="font-size:24px"></span>
<span class="fa fa-star-half rated " style="font-size:24px"></span> 
<span class="fa fa-star " style="font-size:24px"></span>
<?php
}
?>
<?php if($value==4)
{?>
<span class="fa fa-star rated" style="font-size:24px"></span>
<span class="fa fa-star rated " style="font-size:24px"></span>
<span class="fa fa-star rated " style="font-size:24px"></span>
<span class="fa fa-star rated " style="font-size:24px"></span>
<span class="fa fa-star " style="font-size:24px"></span>
<?php
}
?>
<?php if($value==4.5)
{?>
<span class="fa fa-star rated" style="font-size:24px"></span>
<span class="fa fa-star rated " style="font-size:24px"></span>
<span class="fa fa-star rated " style="font-size:24px"></span>
<span class="fa fa-star rated " style="font-size:24px"></span>
<span class="fa fa-star-half rated " style="font-size:24px"></span> 
<?php
}
?>
<?php if($value==5)
{?>
<span class="fa fa-star rated" style="font-size:24px"></span>
<span class="fa fa-star rated " style="font-size:24px"></span>
<span class="fa fa-star rated " style="font-size:24px"></span>
<span class="fa fa-star rated " style="font-size:24px"></span>
<span class="fa fa-star rated " style="font-size:24px"></span>
<?php
}
}
?>