shortcode Teacher

/* Register shortcode Teacher ********************************************/


function section_feed_shortcode( $atts ) {
extract( shortcode_atts( array( 'limit' => 12, 'type' => 'our-teacher', 'category' => '', 'title' => ''), $atts ) );

$paged = get_query_var('paged') ? get_query_var('paged') : 1;

query_posts(  array (
	'posts_per_page' => $limit,
	'post_type' => $type,
	'order' => 'DESC',
	'teacher_cat' => $category,
	'paged' => $paged ) );

$list = '<div class="member"><h2>'.$title.'</h2></div>';

while ( have_posts() ) { the_post();

	$list .='<div class="single_team col-md-3">'
				.''.get_the_post_thumbnail( $post->ID, 'teacher-thumbnail' ).''
				.'<h2>'.get_the_title().'</h2>'
				.'<p>'.get_the_content().'</p>'
				.'<div class="social_bookmark">'
					.'<a href="#">'.get_post_meta( get_the_ID(), 'mobile', true ).'</i></a>'
					.'<a href="'.get_post_meta( get_the_ID(), 'facebook_link', true ).'"><i class="fa fa-facebook"></i></a>'
					.'<a href="mailto:'.get_post_meta( get_the_ID(), 'email', true ).'"><i class="fa fa-envelope"></i></a>'
				.'</div>'
			.'</div>';
}

return
'<div class="listings clearfix">'
. $list
. '<div class="nav-previous">' . get_next_posts_link( __( '<span class="meta-nav">&larr;</span> Older posts' ) ) . '</div>'
. '<div class="nav-next">' . get_previous_posts_link( __( 'Newer posts <span class="meta-nav">&rarr;</span>' ) ) . '</div>'
. '</div>' .
wp_reset_query();

}
add_shortcode( 'our_teacher', 'section_feed_shortcode' );