spcl.php

<?php
/**
 * Plugin Name: Save Post. Check Links.
 * Description: Verifies URLs of links in your content are reachable when saving a post in WordPress.
 * Author:      pluginkollektiv
 * Author URI:  https://pluginkollektiv.org
 * Plugin URI:  https://wordpress.org/plugins/spcl/
 * License:     GPLv2 or later
 * License URI: http://www.gnu.org/licenses/gpl-2.0.html
 * Version:     1.0.1
 * Text Domain: spcl
 *
 * @package spcl
 */

/*
Copyright (C)  2011-2014 Sergej Müller

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

defined( 'ABSPATH' ) || exit;

define( 'SPCL_VERSION', '1.0.1' );

// Backend only.
if ( ! is_admin() ) {
	return;
}

// Include class.
require_once(
	sprintf(
		'%s/inc/class-spcl.php',
		dirname( __FILE__ )
	)
);

// Init.
add_action(
	'admin_init',
	array(
		'SPCL',
		'init',
	)
);

// Handle AJAX requests from the block editor.
add_action(
	'wp_ajax_spcl_link_check',
	array(
		'SPCL',
		'handle_ajax_request',
	)
);