php - sprintf example

sprintf.php

$string = <<<EOHTML
        <section  id="anniversary_mobile" class="row">
    <div class="four columns">
    <figure>
                <img class="head hires" src="%s15-years-15mobile.png" width="246" height="185" alt="Celebrating 15 years of blowing customers minds">
        </figure>
    </div>
   
</section>
EOHTML;
$string = sprintf($string, IMG);
echo $string;