Ideal Shortcode example

shortcode.php

<?php 
 
 function button_shortcode($atts,$content){
	 extract($atts=shortcode_atts(array(
	 
		'type'=>!empty($type) ? $type:'success',
		'link'=>'http://www.m.facebook.com',
        'icon'=> empty($icon) ? 'heart': $icon	,	
		'content'=> !empty($content) ? $content : 'empty content here'
	 ),$atts,'btn'));
	
	return '<a href="'.$link.'" class="btn btn-'.$type.'"><i class="fa fa-'.$icon.' "></i> '.$content.' </a>'; 
 }
add_shortcode('btn','button_shortcode');
?>