Shortcodes Base Class

class-shortcodes-base.php

<?php

/**
 * Shortcodes Base Class
 *
 * Adds dynamically named shortcodes using a child class's functions.
 * Shortcode will not be created for functions prefixed with an underscore (_);
 * Prefix is optional (recommended).
 *
 */
abstract class Shortcodes_Base {

	private $shortcodes = array();

	/**
	 * optional shortcode prefix
	 * @return string
	 */
	abstract public function _prefix();

	function __construct() {

		$functions = get_class_methods( get_called_class() );

		$prefix = $this->_prefix() ? $this->_prefix() . '-' : '';

		foreach ( $functions as $function ) {

			if ( substr( $function, 0, 1 ) === '_' ) {
				continue;
			}

			$shortcode_tag = $prefix . str_replace( '_', '-', $function );

			$this->shortcodes[ $shortcode_tag ] = $function;

			add_shortcode( $shortcode_tag, array( $this, '_loader' ) );
		}
	}

	/**
	 * calls the shortcode related function
	 *
	 * @param array $atts
	 * @param null $content
	 * @param string $tag
	 *
	 * @return string
	 */
	function _loader( $atts = array(), $content = null, $tag = '' ) {

		if ( ! array_key_exists( $tag, $this->shortcodes ) ) {
			return '';
		}

		$function_name = $this->shortcodes[ $tag ];

		ob_start();

		call_user_func( array( $this, $function_name ), $atts, $content );

		return ob_get_clean();
	}
}