CSS
.center-cropped-main {
width: 99%;
height: 280px;
background-position: center center;
background-repeat: no-repeat;
background-size: cover
}
php
<?$bg=Yii::getAlias('@ImagePath/uploads/content/').$con->cover_path;?>
<div class="center-cropped-main"
style="<?php print "background-image: url('$bg');"; ?>">
</div>
