Google

Edit File: Shortcode.php

<?php namespace WordPressPopularPosts\Shortcode; abstract class Shortcode { /** * Shortcode tag (eg. footag) * * @since 6.3.0 * @var string * @access protected */ protected $tag; /** * Initializes shortcode. * */ public function init() { $this->register(); } /** * Registers the shortcode * * @since 6.3.0 */ public function register() : void { if ( $this->tag ) { add_shortcode( $this->tag, [$this, 'handle'] ); } } /** * Handles the HTML output of the shortcode. * * @since 6.3.0 * @param array $attributes Array of attributes passed to the shortcode * @return string $html HTML output */ abstract public function handle(array $attributes) : string; }