Section With Wrap Shortcode

functions.php

//* Page Section with field for unique class.

function contentSection( $atts, $content = null ) {
$content = preg_replace('#^<\/p>|<p>$#', '', $content);
$a = shortcode_atts( array(
		'class' => 'Add Classes Here',

), $atts );
   return '<div class="full-block '."{$a['class']}".' "><div class="wrap">' . do_shortcode($content) . '</div></div>';
}
add_shortcode('content-section', 'contentSection');