| 1 |
<?php |
| 2 |
/* |
| 3 |
Plugin Name: Virtual Robots.txt |
| 4 |
Version: 1.10 |
| 5 |
Plugin URI: http://infolific.com/technology/software-worth-using/robots-txt-plugin-for-wordpress |
| 6 |
Description: Automatically creates a virtual robots.txt file for your site. |
| 7 |
Author: Marios Alexandrou |
| 8 |
Author URI: http://infolific.com/technology/ |
| 9 |
License: GPLv2 or later |
| 10 |
Text Domain: pc-robotstxt |
| 11 |
*/ |
| 12 |
|
| 13 |
/* |
| 14 |
Copyright 2016 Marios Alexandrou |
| 15 |
|
| 16 |
Originally developed by Peter Coughlin |
| 17 |
|
| 18 |
This program is free software; you can redistribute it and/or |
| 19 |
modify it under the terms of the GNU General Public License |
| 20 |
as published by the Free Software Foundation; either version 2 |
| 21 |
of the License, or (at your option) any later version. |
| 22 |
|
| 23 |
This program is distributed in the hope that it will be useful, |
| 24 |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 25 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 26 |
GNU General Public License for more details. |
| 27 |
|
| 28 |
You should have received a copy of the GNU General Public License |
| 29 |
along with this program; if not, write to the Free Software |
| 30 |
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 31 |
*/ |
| 32 |
|
| 33 |
class pc_robotstxt { |
| 34 |
|
| 35 |
function __construct() { |
| 36 |
|
| 37 |
// make sure we have the right paths... |
| 38 |
if ( !defined( 'WP_PLUGIN_URL' ) ) { |
| 39 |
if ( !defined( 'WP_CONTENT_DIR' ) ) define( 'WP_CONTENT_DIR', ABSPATH.'wp-content' ); |
| 40 |
if ( !defined( 'WP_CONTENT_URL' ) ) define( 'WP_CONTENT_URL', get_option( 'siteurl' ).'/wp-content' ); |
| 41 |
if ( !defined( 'WP_PLUGIN_DIR' ) ) define( 'WP_PLUGIN_DIR', WP_CONTENT_DIR.'/plugins' ); |
| 42 |
define( 'WP_PLUGIN_URL', WP_CONTENT_URL.'/plugins' ); |
| 43 |
}// end if |
| 44 |
|
| 45 |
// stuff to do when the plugin is loaded |
| 46 |
// i.e. register_activation_hook(__FILE__, array(&$this, 'activate')); |
| 47 |
// i.e. register_deactivation_hook(__FILE__, array(&$this, 'deactivate')); |
| 48 |
register_deactivation_hook( __FILE__, array( &$this, 'deactivate' ) ); |
| 49 |
|
| 50 |
// add_filter('hook_name', 'your_filter', [priority], [accepted_args]); |
| 51 |
// i.e. add_filter('the_content', array(&$this, 'filter')); |
| 52 |
|
| 53 |
// add_action ('hook_name', 'your_function_name', [priority], [accepted_args]); |
| 54 |
// i.e. add_action('wp_head', array(&$this, 'action')); |
| 55 |
|
| 56 |
// only if we're public |
| 57 |
if ( get_option( 'blog_public' ) ) { |
| 58 |
remove_action( 'do_robots', 'do_robots' ); |
| 59 |
add_action( 'do_robots', array(&$this, 'do_robots' ) ); |
| 60 |
}// end if |
| 61 |
|
| 62 |
//add quick links to plugins page |
| 63 |
$plugin = plugin_basename( __FILE__ ); |
| 64 |
if ( is_admin() ) |
| 65 |
add_filter( "plugin_action_links_$plugin", array( &$this, 'settings_link' ) ); |
| 66 |
|
| 67 |
}// end function |
| 68 |
|
| 69 |
function activate() { |
| 70 |
// stuff to do when the plugin is activated |
| 71 |
}// end function |
| 72 |
|
| 73 |
function deactivate() { |
| 74 |
// stuff to do when plugin is deactivated |
| 75 |
// i.e. delete_option('pc_robotstxt'); |
| 76 |
$options = $this->get_options(); |
| 77 |
if ( $options['remove_settings'] ) |
| 78 |
delete_option( 'pc_robotstxt' ); |
| 79 |
}// end function |
| 80 |
|
| 81 |
function settings_link($links) { |
| 82 |
$settings_link = '<a href="options-general.php?page=pc-robotstxt/admin.php">Settings</a>'; |
| 83 |
array_unshift( $links, $settings_link ); |
| 84 |
return $links; |
| 85 |
}// end function |
| 86 |
|
| 87 |
function do_robots() { |
| 88 |
|
| 89 |
if ( is_robots() ) { |
| 90 |
|
| 91 |
$options = $this->get_options(); |
| 92 |
|
| 93 |
$output = "# This virtual robots.txt file was created by the Virtual Robots.txt WordPress plugin: https://www.wordpress.org/plugins/pc-robotstxt/\n"; |
| 94 |
|
| 95 |
if ( '' != $options['user_agents'] ) { |
| 96 |
$output .= stripcslashes( $options['user_agents'] ); |
| 97 |
} |
| 98 |
|
| 99 |
// if there's an existing sitemap file or we're using pc-xml-sitemap plugin add a reference.. |
| 100 |
$protocol = ( ( !empty($_SERVER['HTTPS'] ) && $_SERVER['HTTPS'] != 'off' ) || $_SERVER['SERVER_PORT'] == 443 ) ? "https://" : "http://"; |
| 101 |
if ( file_exists( $_SERVER['DOCUMENT_ROOT'].'/sitemap.xml.gz' ) ) { |
| 102 |
$output .= "\n\n".'Sitemap: '.$protocol.$_SERVER['HTTP_HOST'].'/sitemap.xml.gz'; |
| 103 |
} elseif ( class_exists('pc_xml_sitemap' ) || file_exists($_SERVER['DOCUMENT_ROOT'].'/sitemap.xml' ) ) { |
| 104 |
$output .= "\n\n".'Sitemap: '.$protocol.$_SERVER['HTTP_HOST'].'/sitemap.xml'; |
| 105 |
} |
| 106 |
|
| 107 |
header('Status: 200 OK', true, 200); |
| 108 |
header('Content-type: text/plain; charset=' . get_bloginfo('charset')); |
| 109 |
echo $output; |
| 110 |
exit; |
| 111 |
|
| 112 |
}// end if |
| 113 |
|
| 114 |
}// end function |
| 115 |
|
| 116 |
function get_options() { |
| 117 |
$options = get_option( 'pc_robotstxt' ); |
| 118 |
if ( !is_array( $options ) ) |
| 119 |
$options = $this->set_defaults(); |
| 120 |
return $options; |
| 121 |
}// end function |
| 122 |
|
| 123 |
function set_defaults() { |
| 124 |
$options = array( |
| 125 |
'user_agents' => "User-agent: *\n" |
| 126 |
."Disallow: /wp-admin/\n" |
| 127 |
."Allow: /wp-admin/admin-ajax.php\n" |
| 128 |
."Disallow: /wp-includes/\n" |
| 129 |
."Allow: /wp-includes/js/\n" |
| 130 |
."Allow: /wp-includes/images/\n" |
| 131 |
."Disallow: /trackback/\n" |
| 132 |
."Disallow: /wp-login.php\n" |
| 133 |
."Disallow: /wp-register.php", |
| 134 |
'remove_settings' => false |
| 135 |
); |
| 136 |
update_option( 'pc_robotstxt', $options ); |
| 137 |
return $options; |
| 138 |
}// end function |
| 139 |
|
| 140 |
}// end class |
| 141 |
$pc_robotstxt = new pc_robotstxt; |
| 142 |
|
| 143 |
if ( is_admin() ) { |
| 144 |
include_once dirname( __FILE__ ).'/admin.php'; |
| 145 |
} |
