├── index.php
├── .gitattributes
├── .gitignore
├── fortify-info.php
├── fortify-settings.php
├── fortify.php
├── readme.txt
└── fortify-functions.php


/index.php:
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1 | <?php
2 | // Silence is golden.
3 | 


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/.gitattributes:
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 1 | # Auto detect text files and perform LF normalization
 2 | * text=auto
 3 | 
 4 | # Custom for Visual Studio
 5 | *.cs     diff=csharp
 6 | 
 7 | # Standard to msysgit
 8 | *.doc	 diff=astextplain
 9 | *.DOC	 diff=astextplain
10 | *.docx diff=astextplain
11 | *.DOCX diff=astextplain
12 | *.dot  diff=astextplain
13 | *.DOT  diff=astextplain
14 | *.pdf  diff=astextplain
15 | *.PDF	 diff=astextplain
16 | *.rtf	 diff=astextplain
17 | *.RTF	 diff=astextplain
18 | 


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/.gitignore:
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 1 | # Windows image file caches
 2 | Thumbs.db
 3 | ehthumbs.db
 4 | 
 5 | # Folder config file
 6 | Desktop.ini
 7 | 
 8 | # Recycle Bin used on file shares
 9 | $RECYCLE.BIN/
10 | 
11 | # Windows Installer files
12 | *.cab
13 | *.msi
14 | *.msm
15 | *.msp
16 | 
17 | # Windows shortcuts
18 | *.lnk
19 | 
20 | # =========================
21 | # Operating System Files
22 | # =========================
23 | 
24 | # OSX
25 | # =========================
26 | 
27 | .DS_Store
28 | .AppleDouble
29 | .LSOverride
30 | 
31 | # Thumbnails
32 | ._*
33 | 
34 | # Files that might appear on external disk
35 | .Spotlight-V100
36 | .Trashes
37 | 
38 | # Directories potentially created on remote AFP share
39 | .AppleDB
40 | .AppleDesktop
41 | Network Trash Folder
42 | Temporary Items
43 | .apdisk
44 | 


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/fortify-info.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | 
 3 | if ( ! defined( 'ABSPATH' ) ) { // Avoid direct calls to this file and prevent full path disclosure
 4 | 	exit;
 5 | }
 6 | 
 7 | function fortify_admin_notice() {
 8 | 	global $pagenow;
 9 | 	if ($pagenow == 'edit-comments.php'):
10 | 		$user_id = get_current_user_id();
11 | 		$fortify_info_visibility = get_user_meta($user_id, 'fortify_info_visibility', true);
12 | 		if ($fortify_info_visibility == 1 OR $fortify_info_visibility == ''):
13 | 			$blocked_total = 0; // show 0 by default
14 | 			$fortify_stats = get_option('fortify_stats', array());
15 | 			if (isset($fortify_stats['blocked_total'])) {
16 | 				$blocked_total = $fortify_stats['blocked_total'];
17 | 			}
18 | 			?>
19 | 			<div class="update-nag fortify-panel-info">
20 | 				<p style="margin: 0;">
21 | 					<?php echo esc_html($blocked_total); ?> spam comments have been blocked by <a href="http://wordpress.org/plugins/fortify/">Fortify</a> plugin so far.
22 | 				</p>
23 | 			</div>
24 | 			<?php
25 | 		endif; // end of if($fortify_info_visibility)
26 | 	endif; // end of if($pagenow == 'edit-comments.php')
27 | }
28 | add_action('admin_notices', 'fortify_admin_notice');
29 | 
30 | 
31 | function fortify_display_screen_option() {
32 | 	global $pagenow;
33 | 	if ($pagenow == 'edit-comments.php'):
34 | 		$user_id = get_current_user_id();
35 | 		$fortify_info_visibility = get_user_meta($user_id, 'fortify_info_visibility', true);
36 | 
37 | 		if ($fortify_info_visibility == 1 OR $fortify_info_visibility == '') {
38 | 			$checked = 'checked="checked"';
39 | 		} else {
40 | 			$checked = '';
41 | 		}
42 | 
43 | 		?>
44 | 		<script>
45 | 			jQuery(function($){
46 | 				$('.fortify_screen_options_group').insertAfter('#screen-options-wrap #adv-settings');
47 | 			});
48 | 		</script>
49 | 		<form method="post" class="fortify_screen_options_group" style="padding: 20px 0 5px 0;">
50 | 			<input type="hidden" name="fortify_option_submit" value="1" />
51 | 			<label>
52 | 				<input name="fortify_info_visibility" type="checkbox"
53 |                     value="1" <?php echo esc_html($checked); ?> />
54 | 				Fortify info
55 | 			</label>
56 | 			<input type="submit" class="button" value="<?php _e('Apply'); ?>" />
57 | 		</form>
58 | 		<?php
59 | 	endif; // end of if($pagenow == 'edit-comments.php')
60 | }
61 | 
62 | 
63 | function fortify_register_screen_option() {
64 | 	add_filter('screen_layout_columns', 'fortify_display_screen_option');
65 | }
66 | add_action('admin_head', 'fortify_register_screen_option');
67 | 
68 | 
69 | function fortify_update_screen_option() {
70 | 	if (isset($_POST['fortify_option_submit']) AND $_POST['fortify_option_submit'] == 1) {
71 | 		$user_id = get_current_user_id();
72 | 		if (isset($_POST['fortify_info_visibility']) AND $_POST['fortify_info_visibility'] == 1) {
73 | 			update_user_meta($user_id, 'fortify_info_visibility', 1);
74 | 		} else {
75 | 			update_user_meta($user_id, 'fortify_info_visibility', 0);
76 | 		}
77 | 	}
78 | }
79 | add_action('admin_init', 'fortify_update_screen_option');
80 | 


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/fortify-settings.php:
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 1 | <?php
 2 | /*
 3 | Fortify settings code
 4 | used WordPress Settings API - http://codex.wordpress.org/Settings_API
 5 | */
 6 | 
 7 | if ( ! defined( 'ABSPATH' ) ) { // Avoid direct calls to this file and prevent full path disclosure
 8 | 	exit;
 9 | }
10 | 
11 | 
12 | function fortify_menu() { // add menu item
13 | 	add_options_page('Fortify', 'Fortify', 'manage_options', 'fortify', 'fortify_settings');
14 | }
15 | add_action('admin_menu', 'fortify_menu');
16 | 
17 | 
18 | function fortify_admin_init() {
19 | 	register_setting('fortify_settings_group', 'fortify_settings', 'fortify_settings_validate');
20 | 
21 | 	add_settings_section('fortify_settings_automatic_section', '', 'fortify_section_callback', 'fortify_automatic_page');
22 | 
23 | 	add_settings_field('save_spam_comments', 'Save spam comments', 'fortify_field_save_spam_comments_callback', 'fortify_automatic_page', 'fortify_settings_automatic_section');
24 | 
25 | }
26 | add_action('admin_init', 'fortify_admin_init');
27 | 
28 | 
29 | function fortify_settings_init() { // set default settings
30 | 	global $fortify_settings;
31 | 	$fortify_settings = fortify_get_settings();
32 | 	update_option('fortify_settings', $fortify_settings);
33 | }
34 | add_action('admin_init', 'fortify_settings_init');
35 | 
36 | 
37 | function fortify_settings_validate($input) {
38 | 	$default_settings = fortify_get_settings();
39 | 	
40 | 	// checkbox
41 | 	$output['save_spam_comments'] = $input['save_spam_comments'];
42 | 
43 | 	return $output;
44 | }
45 | 
46 | 
47 | function fortify_section_callback() { // Fortify settings description
48 | 	echo '';
49 | }
50 | 
51 | 
52 | function fortify_field_save_spam_comments_callback() {
53 | 	$settings = fortify_get_settings();
54 | 	echo '<label><input type="checkbox" name="fortify_settings[save_spam_comments]" '.checked(1, $settings['save_spam_comments'], false).' value="1" />';
55 | 	echo ' Save spam comments into spam section</label>';
56 | 	echo '<p class="description">Useful for testing how the plugin works. <a href="'. admin_url( 'edit-comments.php?comment_status=spam' ) . '">View spam section</a>.</p>';
57 | }
58 | 
59 | 
60 | function fortify_settings() {
61 | 	$fortify_stats = get_option('fortify_stats', array());
62 | 
63 | 	if (array_key_exists('blocked_total', $fortify_stats)) {
64 | 	    $blocked_total = $fortify_stats['blocked_total'];
65 |     } else {
66 |         $blocked_total = 0;
67 |     }
68 | 
69 | 	?>
70 | 	<div class="wrap">
71 | 		
72 | 		<h2><span class="dashicons dashicons-admin-generic"></span> Fortify</h2>
73 | 
74 | 		<div class="fortify-panel-info">
75 | 			<p style="margin: 0;">
76 | 				<span class="dashicons dashicons-chart-bar"></span>
77 | 				<strong><?php echo esc_html($blocked_total); ?></strong> spam comments were blocked
78 | 				by <a href="https://wordpress.org/plugins/fortify/" target="_blank">Fortify</a> plugin so far.
79 | 			</p>
80 | 		</div>
81 | 
82 | 		<form method="post" action="options.php">
83 | 			<?php settings_fields('fortify_settings_group'); ?>
84 | 			<div class="fortify-group-automatic">
85 | 				<?php do_settings_sections('fortify_automatic_page'); ?>
86 | 			</div>
87 | 			<?php submit_button(); ?>
88 | 		</form>
89 | 
90 | 	</div>
91 | 	<?php
92 | }
93 | 


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/fortify.php:
--------------------------------------------------------------------------------
 1 | <?php
 2 | /*
 3 | Plugin Name: Fortify
 4 | Plugin URI: http://wordpress.org/plugins/fortify/
 5 | Description: No spam in comments. No captcha.
 6 | Version: 1.0
 7 | Author: webvitaly
 8 | Text Domain: fortify
 9 | Author URI: http://web-profile.net/wordpress/plugins/
10 | License: GPLv3
11 | */
12 | 
13 | if ( ! defined( 'ABSPATH' ) ) { // Avoid direct calls to this file and prevent full path disclosure
14 | 	exit;
15 | }
16 | 
17 | define('FORTIFY_PLUGIN_VERSION', '1.0');
18 | 
19 | include('fortify-functions.php');
20 | include('fortify-settings.php');
21 | include('fortify-info.php');
22 | 
23 | 
24 | function fortify_form_part() {
25 | 
26 | 	if ( ! is_user_logged_in()) { // add fortify fields only for not logged in users
27 | 		echo '<!-- Fortify plugin v.'.esc_html(FORTIFY_PLUGIN_VERSION).' wordpress.org/plugins/fortify/ -->
28 | 		<p class="fortify-group fortify-group-q" style="display: none;">
29 | 			<label>Current year <span class="required">*</span></label>
30 | 			<input type="text" name="fortify-q" class="fortify-control fortify-control-q" value="" />
31 | 			<input type="text" name="fortify-a" class="fortify-control fortify-control-a" value="'.esc_html(date('Y')).'"/>
32 | 		</p> <!-- question which is populated by javascript -->
33 | 		<p class="fortify-group fortify-group-e" style="display: none;">
34 | 			<label>Leave this field empty</label>
35 | 			<input type="text" name="fortify-e-email-url-website" class="fortify-control fortify-control-e" value="" />
36 | 		</p> <!-- empty field; trap for spammers because many bots will try to put email or url here -->
37 | 		<script type="text/javascript">
38 | 			let fortify_a = document.getElementsByClassName("fortify-control-a")[0].value;
39 | 			document.querySelector(".fortify-control-q").value = fortify_a;
40 | 		</script>';
41 | 	}
42 | }
43 | add_action('comment_form', 'fortify_form_part'); // add fortify inputs to the comment form
44 | 
45 | 
46 | function fortify_check_comment($commentdata) {
47 | 	$fortify_settings = fortify_get_settings();
48 | 	
49 | 	extract($commentdata);
50 | 
51 | 	if ( ! is_user_logged_in() && $comment_type != 'pingback' && $comment_type != 'trackback') { // logged in user is not a spammer
52 | 		if( fortify_check_for_spam() ) {
53 | 			if( $fortify_settings['save_spam_comments'] ) {
54 | 				fortify_store_comment($commentdata);
55 | 			}
56 | 			fortify_counter_stats();
57 | 			wp_die('Comment is spam.'); // die - do not send comment and show error message
58 | 		}
59 | 	}
60 | 	
61 | 	if ($comment_type == 'trackback') {
62 | 		if( $fortify_settings['save_spam_comments'] ) {
63 | 			fortify_store_comment($commentdata);
64 | 		}
65 | 		fortify_counter_stats();
66 | 		wp_die('Trackbacks are disabled.'); // die - do not send trackback and show error message
67 | 	}
68 | 
69 | 	return $commentdata; // if comment does not looks like spam
70 | }
71 | 
72 | if ( ! is_admin()) { // without this check it is not possible to add comment in admin section
73 | 	add_filter('preprocess_comment', 'fortify_check_comment', 1);
74 | }
75 | 
76 | 
77 | function fortify_plugin_meta($links, $file) { // add some links to plugin meta row
78 | 	if ( $file == plugin_basename( __FILE__ ) ) {
79 | 		$row_meta = array(
80 | 			'support' => '<a href="http://web-profile.net/wordpress/plugins/fortify/" target="_blank">' . __( 'Fortify', 'fortify' ) . '</a>',
81 | 			'donate' => '<a href="http://web-profile.net/donate/" target="_blank">' . __( 'Donate', 'fortify' ) . '</a>'
82 | 		);
83 | 		$links = array_merge( $links, $row_meta );
84 | 	}
85 | 	return (array) $links;
86 | }
87 | add_filter('plugin_row_meta', 'fortify_plugin_meta', 10, 2);
88 | 


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/readme.txt:
--------------------------------------------------------------------------------
 1 | === Fortify ===
 2 | Contributors: webvitaly
 3 | Donate link: http://web-profile.net/donate/
 4 | Tags: spam, spammer, comment, comments, comment-spam, antispam, anti-spam, block-spam, spam-free, spambot, spam-bot, bot
 5 | Requires at least: 5.0
 6 | Tested up to: 5.8.2
 7 | Stable tag: 1.0
 8 | License: GPLv3
 9 | License URI: http://www.gnu.org/licenses/gpl.html
10 | 
11 | No spam in comments. No captcha.
12 | 
13 | == Description ==
14 | 
15 | * **[Fortify](http://web-profile.net/wordpress/plugins/fortify/ "Plugin page")**
16 | * **[Donate](http://web-profile.net/donate/ "Support the development")**
17 | * **[GitHub](https://github.com/webvitalii/fortify "Fork")**
18 | 
19 | 
20 | Fortify plugin blocks automatic spam in comments section. No captcha.
21 | 
22 | Plugin is easy to use: just install it and it just works.
23 | 
24 | Blocked comments can be stored in the Spam area if needed. This can be enabled/disabled via Settings page. This is useful for testing and debug purpose. Blocked spam comments can be easily converted to regular comments if needed.
25 | 
26 | Fortify plugin is GDPR compliant and does not store any other user data except of the behavior mentioned above.
27 | 
28 | **Plugin blocks spam only in comments section**.
29 | 
30 | 
31 | 
32 | After installing the Fortify plugin **try to submit a comment on your site being logged out**.
33 | If you get an error - you may check the solution in the [Support section](http://wordpress.org/support/plugin/fortify ) or submit a new topic with detailed description of your problem.
34 | 
35 | 
36 | == Installation ==
37 | 
38 | 1. Install and activate the plugin on the Plugins page
39 | 2. Enjoy life without spam in comments
40 | 
41 | == Frequently Asked Questions ==
42 | 
43 | = How to test what spam comments were blocked? =
44 | 
45 | You can visit Fortify settings page and enable saving blocked comments as spam in the spam section.
46 | To enabled that you need to go to: WordPress admin dashboard => Settings section => Fortify
47 | Saving blocked comments into spam section is disabled by default.
48 | Saving spam comments can help you to keep all the comments saved and review them in future if needed. You can easily mark comment as "not spam" if some of the comments have been blocked by mistake.
49 | 
50 | = What is the percentage of spam blocked? =
51 | 
52 | Fortify plugin blocks 100% of automatic spam messages (sent by spam-bots via post requests).
53 | Plugin does not block manual spam (submitted by spammers manually via browser).
54 | 
55 | = Incompatible with: =
56 | 
57 | * Disqus
58 | * Jetpack Comments
59 | * AJAX Comment Form
60 | * bbPress
61 | 
62 | = How does Fortify plugin work? =
63 | 
64 | The blocking algorithm is based on "honeypot technique" and the fact that spam bots does not have JavaScript enabled.
65 | Fortify plugin adds invisible to regular users input fields.
66 | And spam bots fill in those fields which helps to identify that as spam.
67 | 
68 | = How to know the counter of blocked spam comments? =
69 | 
70 | You can find the info block with total spam blocked counter in the admin comments section.
71 | You can hide or show this info block in the "Screen Options" section.
72 | The visibility option for this info block is saved per user.
73 | 
74 | = Does plugin block spam from Contact or other forms? =
75 | 
76 | Plugin blocks spam only in comments form section and does not block spam from any other forms on site.
77 | If you installed and activated the plugin and you still receiving spam - probably this could be because of some other forms on your site (for example feedback form).
78 | 
79 | = What about trackback spam? =
80 | 
81 | Users rarely use trackbacks because it is manual and requires extra input. Spammers uses trackbacks because it is easy to cheat here.
82 | Users use pingbacks very often because they work automatically. Spammers does not use pingbacks because backlinks are checked.
83 | So trackbacks are blocked but pingbacks are enabled. 
84 | You may read more about the [difference between trackbacks and pingbacks](http://web-profile.net/web/trackback-vs-pingback/)
85 | 
86 | = What browsers are supported? =
87 | 
88 | All modern browsers and IE8+ are supported.
89 | 
90 | = Not enough information about the plugin? =
91 | 
92 | You may check out the [source code of the plugin](http://plugins.trac.wordpress.org/browser/fortify/trunk/fortify.php).
93 | 
94 | 
95 | == Changelog ==
96 | 
97 | = 1.0 =
98 | * initial release
99 | 


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/fortify-functions.php:
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  1 | <?php
  2 | 
  3 | if ( ! defined( 'ABSPATH' ) ) { // Avoid direct calls to this file and prevent full path disclosure
  4 | 	exit;
  5 | }
  6 | 
  7 | function fortify_default_settings() {
  8 | 	$settings = array(
  9 | 		'save_spam_comments' => 0
 10 | 	);
 11 | 	return $settings;
 12 | }
 13 | 
 14 | 
 15 | function fortify_get_settings() {
 16 | 	$fortify_settings = (array) get_option('fortify_settings');
 17 | 	$default_settings = fortify_default_settings();
 18 | 	$fortify_settings = array_merge($default_settings, $fortify_settings); // set empty options with default values
 19 | 	return $fortify_settings;
 20 | }
 21 | 
 22 | 
 23 | function fortify_counter_stats() {
 24 | 	$fortify_stats = get_option('fortify_stats', array());
 25 | 	if (array_key_exists('blocked_total', $fortify_stats)){
 26 | 		$fortify_stats['blocked_total']++;
 27 | 	} else {
 28 | 		$fortify_stats['blocked_total'] = 1;
 29 | 	}
 30 | 	update_option('fortify_stats', $fortify_stats);
 31 | }
 32 | 
 33 | 
 34 | function fortify_check_for_spam() {
 35 | 	$spam_flag = false;
 36 | 
 37 | 	$fortify_q = '';
 38 | 	if (isset($_POST['fortify-q'])) {
 39 | 		$fortify_q = sanitize_text_field($_POST['fortify-q']);
 40 | 	}
 41 | 	
 42 | 	$fortify_e = '';
 43 | 	if (isset($_POST['fortify-e-email-url-website'])) {
 44 | 		$fortify_e = sanitize_text_field($_POST['fortify-e-email-url-website']);
 45 | 	}
 46 | 	
 47 | 	if ( $fortify_q != date('Y') ) { // year-answer is wrong - it is spam
 48 | 		$spam_flag = true;
 49 | 	}
 50 | 
 51 | 	if ( ! empty($fortify_e)) { // trap field is not empty - it is spam
 52 | 		$spam_flag = true;
 53 | 	}
 54 | 	
 55 | 	return $spam_flag;
 56 | }
 57 | 
 58 | 
 59 | function fortify_store_comment($commentdata) {
 60 | 	global $wpdb;
 61 | 	$wp_error = true;
 62 | 
 63 | 	if ( isset( $commentdata['user_ID'] ) ) {
 64 | 		$commentdata['user_id'] = $commentdata['user_ID'] = (int) $commentdata['user_ID'];
 65 | 	}
 66 | 
 67 | 	$prefiltered_user_id = ( isset( $commentdata['user_id'] ) ) ? (int) $commentdata['user_id'] : 0;
 68 | 
 69 | 	$commentdata['comment_post_ID'] = (int) $commentdata['comment_post_ID'];
 70 | 	if ( isset( $commentdata['user_ID'] ) && $prefiltered_user_id !== (int) $commentdata['user_ID'] ) {
 71 | 		$commentdata['user_id'] = $commentdata['user_ID'] = (int) $commentdata['user_ID'];
 72 | 	} elseif ( isset( $commentdata['user_id'] ) ) {
 73 | 		$commentdata['user_id'] = (int) $commentdata['user_id'];
 74 | 	}
 75 | 
 76 | 	$commentdata['comment_parent'] = isset($commentdata['comment_parent']) ? absint($commentdata['comment_parent']) : 0;
 77 | 	$parent_status = ( 0 < $commentdata['comment_parent'] ) ? wp_get_comment_status($commentdata['comment_parent']) : '';
 78 | 	$commentdata['comment_parent'] = ( 'approved' == $parent_status || 'unapproved' == $parent_status ) ? $commentdata['comment_parent'] : 0;
 79 | 
 80 | 	if ( ! isset( $commentdata['comment_author_IP'] ) ) {
 81 | 		$commentdata['comment_author_IP'] = $_SERVER['REMOTE_ADDR'];
 82 | 	}
 83 | 	$commentdata['comment_author_IP'] = preg_replace( '/[^0-9a-fA-F:., ]/', '', $commentdata['comment_author_IP'] );
 84 | 
 85 | 	if ( ! isset( $commentdata['comment_agent'] ) ) {
 86 | 		$commentdata['comment_agent'] = isset( $_SERVER['HTTP_USER_AGENT'] ) ? $_SERVER['HTTP_USER_AGENT']: '';
 87 | 	}
 88 | 	$commentdata['comment_agent'] = substr( $commentdata['comment_agent'], 0, 254 );
 89 | 
 90 | 	if ( empty( $commentdata['comment_date'] ) ) {
 91 | 		$commentdata['comment_date'] = current_time('mysql');
 92 | 	}
 93 | 
 94 | 	if ( empty( $commentdata['comment_date_gmt'] ) ) {
 95 | 		$commentdata['comment_date_gmt'] = current_time( 'mysql', 1 );
 96 | 	}
 97 | 
 98 | 	$commentdata = wp_filter_comment($commentdata);
 99 | 
100 | 	$commentdata['comment_approved'] = wp_allow_comment( $commentdata, $wp_error );
101 | 	if ( is_wp_error( $commentdata['comment_approved'] ) ) {
102 | 		return $commentdata['comment_approved'];
103 | 	}
104 | 
105 | 	$comment_ID = wp_insert_comment($commentdata);
106 | 	if ( ! $comment_ID ) {
107 | 		$fields = array( 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_content' );
108 | 
109 | 		foreach ( $fields as $field ) {
110 | 			if ( isset( $commentdata[ $field ] ) ) {
111 | 				$commentdata[ $field ] = $wpdb->strip_invalid_text_for_column( $wpdb->comments, $field, $commentdata[ $field ] );
112 | 			}
113 | 		}
114 | 
115 | 		$commentdata = wp_filter_comment( $commentdata );
116 | 
117 | 		$commentdata['comment_approved'] = wp_allow_comment( $commentdata, $wp_error );
118 | 		if ( is_wp_error( $commentdata['comment_approved'] ) ) {
119 | 			return $commentdata['comment_approved'];
120 | 		}
121 | 
122 | 		$comment_ID = wp_insert_comment( $commentdata );
123 | 		if ( ! $comment_ID ) {
124 | 			return false;
125 | 		}
126 | 	}
127 | 	
128 | 	wp_set_comment_status( $comment_ID, 'spam' );
129 | }
130 | 


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