style not working when element created using PHP's "echo' '" - php

Question

I use PHP code to insert some elements in another PHP file, when the elements were originally created inside the calling PHP file style worked just fine, but when i replaced the code with an 'include(somephpfile.php)', elements were added the way i wanted them to but style didnt apply.
style doesn't apply to elements created this way:
echo '<div class="col-lg-3 col-md-6 col-sm-6 col-xs-12">
<div class="wow fadeInLeft animated portfolio-item" data-wow-duration="500ms" data-wow-delay="0ms" style="box-shadow: 0px 10px 12px grey; width:80%">
<div class="img-wrapper">
<img src="booksCovers/';
$queryImage = "SELECT cover from books where bookno = '$temp';";
$resultsImage = mysqli_query($db, $queryImage);
$imagesrc = mysqli_fetch_array($resultsImage);
echo $imagesrc[0];
echo '" class="img-responsive" alt="this is a title" style="width : 450px ; height :320px; " />
<div class="mybooks-overlay">
<div class="desc">
<div class="description">';
$query2 = "SELECT description FROM books WHERE bookno = '$temp';";
$results = mysqli_query($db, $query2);
$book = mysqli_fetch_array($results);
echo $book[0];
echo '
</div>
<a class="details" target="_blank " href=" #">Learn More</a>
</div>
</div>
</div>
<figcaption>
<button class="myButtone">
<div class="insider"> </div>
20. 00$
</button>
<div class="heart"></div>
</figcaption>
</div>
</div>';
but it applied when it was done this way:
<div class="col-lg-3 col-md-6 col-sm-6 col-xs-12">
<div class="wow fadeInLeft animated portfolio-item" data-wow-duration="500ms" data-wow-delay="0ms" style="box-shadow: 0px 10px 12px grey; width:80%">
<div class="img-wrapper">
<img src="booksCovers/" class="img-responsive" alt="this is a title" style="width : 450px ; height :320px; " />
<div class="mybooks-overlay">
<div class="desc">
<div class="description">
</div>
</div>
</div>
</div>
<figcaption>
<button class="myButtone">
<div class="insider"> </div>
20. 00$
</button>
<div class="heart"></div>
</figcaption>
</div>
</div>