Shortcode

shortcode.php

<?php

// Add Shortcode
function special_title_shortcode( $atts , $content = null ) {

	// Attributes
	extract( shortcode_atts(
		array(
			'class' => '',
		), $atts )
	);
  
  // Code
  ob_start();?> 
  <div class="mediumtitle specialtitle <?php echo $class; ?>">
    <?php echo $content; ?>
  </div> 
  
  <?php
  return ob_get_clean();

}
add_shortcode( 'special_title', 'special_title_shortcode' );