[PHP] Rating script

Preview:
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Source:

PHP Code:

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<?php
function get_rating($number) {
    if(is_numeric($number)) {
        if($number <= 10 ) {
            for($i=1;$i<=$number;$i++) {
                echo '<img src="http://i.imgur.com/SdT8y.png" width="20px"/>';
            }
            if(strpos($number,".") && substr($number,2,1) != 0) {
                if(substr($number,2,1) >2 && substr($number,2,1) <= 7) {
                    echo '<img src="http://i.imgur.com/kl5R2.png" height="19px" />';
                }
                if(substr($number,2,1) > 7) {
                    echo '<img src="http://i.imgur.com/SdT8y.png" width="20px"/>';
                }
            }
        }    
        if($number > 10) {
            echo 'Value must be up to 10.';
        }
    }    
    if(!is_numeric($number)) {
        echo 'Value must be numeric.';
    }    
}


if(isset($_POST['submit'])) {
    echo get_rating($_POST['text']);
}
?>
<form action="" method="post">
<input type="text" name="text" />
<input type="submit" name="submit" />
</form>

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