source: akismet/trunk/akismet.php @ 536522

Revision 536522, 22.3 KB checked in by tellyworth, 4 weeks ago (diff)

bump and release 2.5.6
  • Property svn:eol-style set to native
Line 
1<?php
2/**
3 * @package Akismet
4 */
5/*
6Plugin Name: Akismet
7Plugin URI: http://akismet.com/?return=true
8Description: Used by millions, Akismet is quite possibly the best way in the world to <strong>protect your blog from comment and trackback spam</strong>. It keeps your site protected from spam even while you sleep. To get started: 1) Click the "Activate" link to the left of this description, 2) <a href="http://akismet.com/get/?return=true">Sign up for an Akismet API key</a>, and 3) Go to your <a href="admin.php?page=akismet-key-config">Akismet configuration</a> page, and save your API key.
9Version: 2.5.6
10Author: Automattic
11Author URI: http://automattic.com/wordpress-plugins/
12License: GPLv2 or later
13*/
14
15/*
16This program is free software; you can redistribute it and/or
17modify it under the terms of the GNU General Public License
18as published by the Free Software Foundation; either version 2
19of the License, or (at your option) any later version.
20
21This program is distributed in the hope that it will be useful,
22but WITHOUT ANY WARRANTY; without even the implied warranty of
23MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
24GNU General Public License for more details.
25
26You should have received a copy of the GNU General Public License
27along with this program; if not, write to the Free Software
28Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
29*/
30
31define('AKISMET_VERSION', '2.5.6');
32define('AKISMET_PLUGIN_URL', plugin_dir_url( __FILE__ ));
33
34/** If you hardcode a WP.com API key here, all key config screens will be hidden */
35if ( defined('WPCOM_API_KEY') )
36        $wpcom_api_key = constant('WPCOM_API_KEY');
37else
38        $wpcom_api_key = '';
39
40// Make sure we don't expose any info if called directly
41if ( !function_exists( 'add_action' ) ) {
42        echo "Hi there!  I'm just a plugin, not much I can do when called directly.";
43        exit;
44}
45
46if ( isset($wp_db_version) && $wp_db_version <= 9872 )
47        include_once dirname( __FILE__ ) . '/legacy.php';
48
49include_once dirname( __FILE__ ) . '/widget.php';
50
51if ( is_admin() )
52        require_once dirname( __FILE__ ) . '/admin.php';
53
54function akismet_init() {
55        global $wpcom_api_key, $akismet_api_host, $akismet_api_port;
56
57        if ( $wpcom_api_key )
58                $akismet_api_host = $wpcom_api_key . '.rest.akismet.com';
59        else
60                $akismet_api_host = get_option('wordpress_api_key') . '.rest.akismet.com';
61
62        $akismet_api_port = 80;
63}
64add_action('init', 'akismet_init');
65
66function akismet_get_key() {
67        global $wpcom_api_key;
68        if ( !empty($wpcom_api_key) )
69                return $wpcom_api_key;
70        return get_option('wordpress_api_key');
71}
72
73function akismet_check_key_status( $key, $ip = null ) {
74        global $akismet_api_host, $akismet_api_port, $wpcom_api_key;
75        $blog = urlencode( get_option('home') );
76        if ( $wpcom_api_key )
77                $key = $wpcom_api_key;
78        $response = akismet_http_post("key=$key&blog=$blog", 'rest.akismet.com', '/1.1/verify-key', $akismet_api_port, $ip);
79        return $response;
80}
81
82// given a response from an API call like akismet_check_key_status(), update the alert code options if an alert is present.
83function akismet_update_alert( $response ) {
84        $code = $msg = null;
85        if ( isset($response[0]['x-akismet-alert-code']) ) {
86                $code = $response[0]['x-akismet-alert-code'];
87                $msg = $response[0]['x-akismet-alert-msg'];
88        }
89       
90        // only call update_option() if the value has changed
91        if ( $code != get_option( 'akismet_alert_code' ) ) {
92                update_option( 'akismet_alert_code', $code );
93                update_option( 'akismet_alert_msg', $msg );
94        }
95}
96
97function akismet_verify_key( $key, $ip = null ) {
98        $response = akismet_check_key_status( $key, $ip );
99        akismet_update_alert( $response );
100        if ( !is_array($response) || !isset($response[1]) || $response[1] != 'valid' && $response[1] != 'invalid' )
101                return 'failed';
102        return $response[1];
103}
104
105// if we're in debug or test modes, use a reduced service level so as not to polute training or stats data
106function akismet_test_mode() {
107        if ( defined('AKISMET_TEST_MODE') && AKISMET_TEST_MODE )
108                return true;
109        return false;
110}
111
112// return a comma-separated list of role names for the given user
113function akismet_get_user_roles($user_id ) {
114        $roles = false;
115       
116        if ( !class_exists('WP_User') )
117                return false;
118       
119        if ( $user_id > 0 ) {
120                $comment_user = new WP_User($user_id);
121                if ( isset($comment_user->roles) )
122                        $roles = join(',', $comment_user->roles);
123        }
124
125        if ( is_multisite() && is_super_admin( $user_id ) ) {
126                if ( empty( $roles ) ) {
127                        $roles = 'super_admin';
128                } else {
129                        $comment_user->roles[] = 'super_admin';
130                        $roles = join( ',', $comment_user->roles );
131                }
132        }
133
134        return $roles;
135}
136
137// Returns array with headers in $response[0] and body in $response[1]
138function akismet_http_post($request, $host, $path, $port = 80, $ip=null) {
139        global $wp_version;
140
141        $akismet_ua = "WordPress/{$wp_version} | ";
142        $akismet_ua .= 'Akismet/' . constant( 'AKISMET_VERSION' );
143
144        $akismet_ua = apply_filters( 'akismet_ua', $akismet_ua );
145
146        $content_length = strlen( $request );
147
148        $http_host = $host;
149        // use a specific IP if provided
150        // needed by akismet_check_server_connectivity()
151        if ( $ip && long2ip( ip2long( $ip ) ) ) {
152                $http_host = $ip;
153        } else {
154                $http_host = $host;
155        }
156       
157        // use the WP HTTP class if it is available
158        if ( function_exists( 'wp_remote_post' ) ) {
159                $http_args = array(
160                        'body'                  => $request,
161                        'headers'               => array(
162                                'Content-Type'  => 'application/x-www-form-urlencoded; ' .
163                                                                        'charset=' . get_option( 'blog_charset' ),
164                                'Host'                  => $host,
165                                'User-Agent'    => $akismet_ua
166                        ),
167                        'httpversion'   => '1.0',
168                        'timeout'               => 15
169                );
170                $akismet_url = "http://{$http_host}{$path}";
171                $response = wp_remote_post( $akismet_url, $http_args );
172                if ( is_wp_error( $response ) )
173                        return '';
174
175                return array( $response['headers'], $response['body'] );
176        } else {
177                $http_request  = "POST $path HTTP/1.0\r\n";
178                $http_request .= "Host: $host\r\n";
179                $http_request .= 'Content-Type: application/x-www-form-urlencoded; charset=' . get_option('blog_charset') . "\r\n";
180                $http_request .= "Content-Length: {$content_length}\r\n";
181                $http_request .= "User-Agent: {$akismet_ua}\r\n";
182                $http_request .= "\r\n";
183                $http_request .= $request;
184               
185                $response = '';
186                if( false != ( $fs = @fsockopen( $http_host, $port, $errno, $errstr, 10 ) ) ) {
187                        fwrite( $fs, $http_request );
188
189                        while ( !feof( $fs ) )
190                                $response .= fgets( $fs, 1160 ); // One TCP-IP packet
191                        fclose( $fs );
192                        $response = explode( "\r\n\r\n", $response, 2 );
193                }
194                return $response;
195        }
196}
197
198// filter handler used to return a spam result to pre_comment_approved
199function akismet_result_spam( $approved ) {
200        // bump the counter here instead of when the filter is added to reduce the possibility of overcounting
201        if ( $incr = apply_filters('akismet_spam_count_incr', 1) )
202                update_option( 'akismet_spam_count', get_option('akismet_spam_count') + $incr );
203        // this is a one-shot deal
204        remove_filter( 'pre_comment_approved', 'akismet_result_spam' );
205        return 'spam';
206}
207
208function akismet_result_hold( $approved ) {
209        // once only
210        remove_filter( 'pre_comment_approved', 'akismet_result_hold' );
211        return '0';
212}
213
214// how many approved comments does this author have?
215function akismet_get_user_comments_approved( $user_id, $comment_author_email, $comment_author, $comment_author_url ) {
216        global $wpdb;
217       
218        if ( !empty($user_id) )
219                return $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->comments WHERE user_id = %d AND comment_approved = 1", $user_id ) );
220               
221        if ( !empty($comment_author_email) )
222                return $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->comments WHERE comment_author_email = %s AND comment_author = %s AND comment_author_url = %s AND comment_approved = 1", $comment_author_email, $comment_author, $comment_author_url ) );
223               
224        return 0;
225}
226
227function akismet_microtime() {
228        $mtime = explode( ' ', microtime() );
229        return $mtime[1] + $mtime[0];
230}
231
232// log an event for a given comment, storing it in comment_meta
233function akismet_update_comment_history( $comment_id, $message, $event=null ) {
234        global $current_user;
235
236        // failsafe for old WP versions
237        if ( !function_exists('add_comment_meta') )
238                return false;
239       
240        $user = '';
241        if ( is_object($current_user) && isset($current_user->user_login) )
242                $user = $current_user->user_login;
243
244        $event = array(
245                'time' => akismet_microtime(),
246                'message' => $message,
247                'event' => $event,
248                'user' => $user,
249        );
250
251        // $unique = false so as to allow multiple values per comment
252        $r = add_comment_meta( $comment_id, 'akismet_history', $event, false );
253}
254
255// get the full comment history for a given comment, as an array in reverse chronological order
256function akismet_get_comment_history( $comment_id ) {
257       
258        // failsafe for old WP versions
259        if ( !function_exists('add_comment_meta') )
260                return false;
261
262        $history = get_comment_meta( $comment_id, 'akismet_history', false );
263        usort( $history, 'akismet_cmp_time' );
264        return $history;
265}
266
267function akismet_cmp_time( $a, $b ) {
268        return $a['time'] > $b['time'] ? -1 : 1;
269}
270
271// this fires on wp_insert_comment.  we can't update comment_meta when akismet_auto_check_comment() runs
272// because we don't know the comment ID at that point.
273function akismet_auto_check_update_meta( $id, $comment ) {
274        global $akismet_last_comment;
275
276        // failsafe for old WP versions
277        if ( !function_exists('add_comment_meta') )
278                return false;
279
280        // wp_insert_comment() might be called in other contexts, so make sure this is the same comment
281        // as was checked by akismet_auto_check_comment
282        if ( is_object($comment) && !empty($akismet_last_comment) && is_array($akismet_last_comment) ) {
283                if ( intval($akismet_last_comment['comment_post_ID']) == intval($comment->comment_post_ID)
284                        && $akismet_last_comment['comment_author'] == $comment->comment_author
285                        && $akismet_last_comment['comment_author_email'] == $comment->comment_author_email ) {
286                                // normal result: true or false
287                                if ( $akismet_last_comment['akismet_result'] == 'true' ) {
288                                        update_comment_meta( $comment->comment_ID, 'akismet_result', 'true' );
289                                        akismet_update_comment_history( $comment->comment_ID, __('Akismet caught this comment as spam'), 'check-spam' );
290                                        if ( $comment->comment_approved != 'spam' )
291                                                akismet_update_comment_history( $comment->comment_ID, sprintf( __('Comment status was changed to %s'), $comment->comment_approved), 'status-changed'.$comment->comment_approved );
292                                } elseif ( $akismet_last_comment['akismet_result'] == 'false' ) {
293                                        update_comment_meta( $comment->comment_ID, 'akismet_result', 'false' );
294                                        akismet_update_comment_history( $comment->comment_ID, __('Akismet cleared this comment'), 'check-ham' );
295                                        if ( $comment->comment_approved == 'spam' ) {
296                                                if ( wp_blacklist_check($comment->comment_author, $comment->comment_author_email, $comment->comment_author_url, $comment->comment_content, $comment->comment_author_IP, $comment->comment_agent) )
297                                                        akismet_update_comment_history( $comment->comment_ID, __('Comment was caught by wp_blacklist_check'), 'wp-blacklisted' );
298                                                else
299                                                        akismet_update_comment_history( $comment->comment_ID, sprintf( __('Comment status was changed to %s'), $comment->comment_approved), 'status-changed-'.$comment->comment_approved );
300                                        }
301                                // abnormal result: error
302                                } else {
303                                        update_comment_meta( $comment->comment_ID, 'akismet_error', time() );
304                                        akismet_update_comment_history( $comment->comment_ID, sprintf( __('Akismet was unable to check this comment (response: %s), will automatically retry again later.'), substr($akismet_last_comment['akismet_result'], 0, 50)), 'check-error' );
305                                }
306                               
307                                // record the complete original data as submitted for checking
308                                if ( isset($akismet_last_comment['comment_as_submitted']) )
309                                        update_comment_meta( $comment->comment_ID, 'akismet_as_submitted', $akismet_last_comment['comment_as_submitted'] );
310                }
311        }
312}
313
314add_action( 'wp_insert_comment', 'akismet_auto_check_update_meta', 10, 2 );
315
316
317function akismet_auto_check_comment( $commentdata ) {
318        global $akismet_api_host, $akismet_api_port, $akismet_last_comment;
319
320        $comment = $commentdata;
321        $comment['user_ip']    = $_SERVER['REMOTE_ADDR'];
322        $comment['user_agent'] = $_SERVER['HTTP_USER_AGENT'];
323        $comment['referrer']   = $_SERVER['HTTP_REFERER'];
324        $comment['blog']       = get_option('home');
325        $comment['blog_lang']  = get_locale();
326        $comment['blog_charset'] = get_option('blog_charset');
327        $comment['permalink']  = get_permalink($comment['comment_post_ID']);
328       
329        if ( !empty( $comment['user_ID'] ) ) {
330                $comment['user_role'] = akismet_get_user_roles($comment['user_ID']);
331        }
332
333        $akismet_nonce_option = apply_filters( 'akismet_comment_nonce', get_option( 'akismet_comment_nonce' ) );
334        $comment['akismet_comment_nonce'] = 'inactive';
335        if ( $akismet_nonce_option == 'true' || $akismet_nonce_option == '' ) {
336                $comment['akismet_comment_nonce'] = 'failed';
337                if ( isset( $_POST['akismet_comment_nonce'] ) && wp_verify_nonce( $_POST['akismet_comment_nonce'], 'akismet_comment_nonce_' . $comment['comment_post_ID'] ) )
338                        $comment['akismet_comment_nonce'] = 'passed';
339
340                // comment reply in wp-admin
341                if ( isset( $_POST['_ajax_nonce-replyto-comment'] ) && check_ajax_referer( 'replyto-comment', '_ajax_nonce-replyto-comment' ) )
342                        $comment['akismet_comment_nonce'] = 'passed';
343
344        }
345
346        if ( akismet_test_mode() )
347                $comment['is_test'] = 'true';
348               
349        foreach ($_POST as $key => $value ) {
350                if ( is_string($value) )
351                        $comment["POST_{$key}"] = $value;
352        }
353
354        $ignore = array( 'HTTP_COOKIE', 'HTTP_COOKIE2', 'PHP_AUTH_PW' );
355
356        foreach ( $_SERVER as $key => $value ) {
357                if ( !in_array( $key, $ignore ) && is_string($value) )
358                        $comment["$key"] = $value;
359                else
360                        $comment["$key"] = '';
361        }
362
363        $post = get_post( $comment['comment_post_ID'] );
364        $comment[ 'comment_post_modified_gmt' ] = $post->post_modified_gmt;
365
366        $query_string = '';
367        foreach ( $comment as $key => $data )
368                $query_string .= $key . '=' . urlencode( stripslashes($data) ) . '&';
369               
370        $commentdata['comment_as_submitted'] = $comment;
371
372        $response = akismet_http_post($query_string, $akismet_api_host, '/1.1/comment-check', $akismet_api_port);
373        akismet_update_alert( $response );
374        $commentdata['akismet_result'] = $response[1];
375        if ( 'true' == $response[1] ) {
376                // akismet_spam_count will be incremented later by akismet_result_spam()
377                add_filter('pre_comment_approved', 'akismet_result_spam');
378
379                do_action( 'akismet_spam_caught' );
380
381                $last_updated = strtotime( $post->post_modified_gmt );
382                $diff = time() - $last_updated;
383                $diff = $diff / 86400;
384               
385                if ( $post->post_type == 'post' && $diff > 30 && get_option( 'akismet_discard_month' ) == 'true' && empty($comment['user_ID']) ) {
386                        // akismet_result_spam() won't be called so bump the counter here
387                        if ( $incr = apply_filters('akismet_spam_count_incr', 1) )
388                                update_option( 'akismet_spam_count', get_option('akismet_spam_count') + $incr );
389                        wp_safe_redirect( $_SERVER['HTTP_REFERER'] );
390                        die();
391                }
392        }
393       
394        // if the response is neither true nor false, hold the comment for moderation and schedule a recheck
395        if ( 'true' != $response[1] && 'false' != $response[1] ) {
396                if ( !current_user_can('moderate_comments') ) {
397                        add_filter('pre_comment_approved', 'akismet_result_hold');
398                }
399                if ( !wp_next_scheduled( 'akismet_schedule_cron_recheck' ) ) {
400                        wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' );
401                }
402        }
403       
404        if ( function_exists('wp_next_scheduled') && function_exists('wp_schedule_event') ) {
405                // WP 2.1+: delete old comments daily
406                if ( !wp_next_scheduled('akismet_scheduled_delete') )
407                        wp_schedule_event(time(), 'daily', 'akismet_scheduled_delete');
408        } elseif ( (mt_rand(1, 10) == 3) ) {
409                // WP 2.0: run this one time in ten
410                akismet_delete_old();
411        }
412        $akismet_last_comment = $commentdata;
413
414        akismet_fix_scheduled_recheck();
415        return $commentdata;
416}
417
418add_action('preprocess_comment', 'akismet_auto_check_comment', 1);
419
420function akismet_delete_old() {
421        global $wpdb;
422        $now_gmt = current_time('mysql', 1);
423        $comment_ids = $wpdb->get_col("SELECT comment_id FROM $wpdb->comments WHERE DATE_SUB('$now_gmt', INTERVAL 15 DAY) > comment_date_gmt AND comment_approved = 'spam'");
424        if ( empty( $comment_ids ) )
425                return;
426               
427        $comma_comment_ids = implode( ', ', array_map('intval', $comment_ids) );
428
429        do_action( 'delete_comment', $comment_ids );
430        $wpdb->query("DELETE FROM $wpdb->comments WHERE comment_id IN ( $comma_comment_ids )");
431        $wpdb->query("DELETE FROM $wpdb->commentmeta WHERE comment_id IN ( $comma_comment_ids )");
432        clean_comment_cache( $comment_ids );
433        $n = mt_rand(1, 5000);
434        if ( apply_filters('akismet_optimize_table', ($n == 11)) ) // lucky number
435                $wpdb->query("OPTIMIZE TABLE $wpdb->comments");
436
437}
438
439function akismet_delete_old_metadata() {
440        global $wpdb;
441
442        $now_gmt = current_time( 'mysql', 1 );
443        $interval = apply_filters( 'akismet_delete_commentmeta_interval', 15 );
444
445        # enfore a minimum of 1 day
446        $interval = absint( $interval );
447        if ( $interval < 1 ) {
448                return;
449        }
450
451        // akismet_as_submitted meta values are large, so expire them
452        // after $interval days regardless of the comment status
453        while ( TRUE ) {
454                $comment_ids = $wpdb->get_col( "SELECT $wpdb->comments.comment_id FROM $wpdb->commentmeta INNER JOIN $wpdb->comments USING(comment_id) WHERE meta_key = 'akismet_as_submitted' AND DATE_SUB('$now_gmt', INTERVAL {$interval} DAY) > comment_date_gmt LIMIT 10000" );
455
456                if ( empty( $comment_ids ) ) {
457                        return;
458                }
459
460                foreach ( $comment_ids as $comment_id ) {
461                        delete_comment_meta( $comment_id, 'akismet_as_submitted' );
462                }
463        }
464
465        /*
466        $n = mt_rand( 1, 5000 );
467        if ( apply_filters( 'akismet_optimize_table', ( $n == 11 ), 'commentmeta' ) ) { // lucky number
468                $wpdb->query( "OPTIMIZE TABLE $wpdb->commentmeta" );
469        }
470        */
471}
472
473add_action('akismet_scheduled_delete', 'akismet_delete_old');
474add_action('akismet_scheduled_delete', 'akismet_delete_old_metadata');
475
476function akismet_check_db_comment( $id, $recheck_reason = 'recheck_queue' ) {
477    global $wpdb, $akismet_api_host, $akismet_api_port;
478
479    $id = (int) $id;
480    $c = $wpdb->get_row( "SELECT * FROM $wpdb->comments WHERE comment_ID = '$id'", ARRAY_A );
481    if ( !$c )
482        return;
483
484    $c['user_ip']    = $c['comment_author_IP'];
485    $c['user_agent'] = $c['comment_agent'];
486    $c['referrer']   = '';
487    $c['blog']       = get_option('home');
488    $c['blog_lang']  = get_locale();
489    $c['blog_charset'] = get_option('blog_charset');
490    $c['permalink']  = get_permalink($c['comment_post_ID']);
491    $id = $c['comment_ID'];
492        if ( akismet_test_mode() )
493                $c['is_test'] = 'true';
494        $c['recheck_reason'] = $recheck_reason;
495
496    $query_string = '';
497    foreach ( $c as $key => $data )
498    $query_string .= $key . '=' . urlencode( stripslashes($data) ) . '&';
499
500    $response = akismet_http_post($query_string, $akismet_api_host, '/1.1/comment-check', $akismet_api_port);
501    return $response[1];
502}
503
504function akismet_cron_recheck() {
505        global $wpdb;
506
507        $status = akismet_verify_key( akismet_get_key() );
508        if ( get_option( 'akismet_alert_code' ) || $status == 'invalid' ) {
509                // since there is currently a problem with the key, reschedule a check for 6 hours hence
510                wp_schedule_single_event( time() + 21600, 'akismet_schedule_cron_recheck' );
511                return false;
512        }
513       
514        delete_option('akismet_available_servers');
515
516        $comment_errors = $wpdb->get_col( "
517                SELECT comment_id
518                FROM {$wpdb->prefix}commentmeta
519                WHERE meta_key = 'akismet_error'
520                LIMIT 100
521        " );
522       
523        foreach ( (array) $comment_errors as $comment_id ) {
524                // if the comment no longer exists, or is too old, remove the meta entry from the queue to avoid getting stuck
525                $comment = get_comment( $comment_id );
526                if ( !$comment || strtotime( $comment->comment_date_gmt ) < strtotime( "-15 days" ) ) {
527                        delete_comment_meta( $comment_id, 'akismet_error' );
528                        continue;
529                }
530               
531                add_comment_meta( $comment_id, 'akismet_rechecking', true );
532                $status = akismet_check_db_comment( $comment_id, 'retry' );
533
534                $msg = '';
535                if ( $status == 'true' ) {
536                        $msg = __( 'Akismet caught this comment as spam during an automatic retry.' );
537                } elseif ( $status == 'false' ) {
538                        $msg = __( 'Akismet cleared this comment during an automatic retry.' );
539                }
540               
541                // If we got back a legit response then update the comment history
542                // other wise just bail now and try again later.  No point in
543                // re-trying all the comments once we hit one failure.
544                if ( !empty( $msg ) ) {
545                        delete_comment_meta( $comment_id, 'akismet_error' );
546                        akismet_update_comment_history( $comment_id, $msg, 'cron-retry' );
547                        update_comment_meta( $comment_id, 'akismet_result', $status );
548                        // make sure the comment status is still pending.  if it isn't, that means the user has already moved it elsewhere.
549                        $comment = get_comment( $comment_id );
550                        if ( $comment && 'unapproved' == wp_get_comment_status( $comment_id ) ) {
551                                if ( $status == 'true' ) {
552                                        wp_spam_comment( $comment_id );
553                                } elseif ( $status == 'false' ) {
554                                        // comment is good, but it's still in the pending queue.  depending on the moderation settings
555                                        // we may need to change it to approved.
556                                        if ( check_comment($comment->comment_author, $comment->comment_author_email, $comment->comment_author_url, $comment->comment_content, $comment->comment_author_IP, $comment->comment_agent, $comment->comment_type) )
557                                                wp_set_comment_status( $comment_id, 1 );
558                                }
559                        }
560                } else {
561                        delete_comment_meta( $comment_id, 'akismet_rechecking' );
562                        wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' );
563                        return;
564                }
565                delete_comment_meta( $comment_id, 'akismet_rechecking' );
566        }
567       
568        $remaining = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->commentmeta WHERE meta_key = 'akismet_error'" ) );
569        if ( $remaining && !wp_next_scheduled('akismet_schedule_cron_recheck') ) {
570                wp_schedule_single_event( time() + 1200, 'akismet_schedule_cron_recheck' );
571        }
572}
573add_action( 'akismet_schedule_cron_recheck', 'akismet_cron_recheck' );
574
575function akismet_add_comment_nonce( $post_id ) {
576        echo '<p style="display: none;">';
577        wp_nonce_field( 'akismet_comment_nonce_' . $post_id, 'akismet_comment_nonce', FALSE );
578        echo '</p>';
579}
580
581$akismet_comment_nonce_option = apply_filters( 'akismet_comment_nonce', get_option( 'akismet_comment_nonce' ) );
582
583if ( $akismet_comment_nonce_option == 'true' || $akismet_comment_nonce_option == '' )
584        add_action( 'comment_form', 'akismet_add_comment_nonce' );
585
586global $wp_version;
587if ( '3.0.5' == $wp_version ) {
588        remove_filter( 'comment_text', 'wp_kses_data' );
589        if ( is_admin() )
590                add_filter( 'comment_text', 'wp_kses_post' );
591}
592
593function akismet_fix_scheduled_recheck() {
594        $future_check = wp_next_scheduled( 'akismet_schedule_cron_recheck' );
595        if ( !$future_check ) {
596                return;
597        }
598
599        if ( get_option( 'akismet_alert_code' ) > 0 ) {
600                return;
601        }
602
603        $check_range = time() + 1200;
604        if ( $future_check > $check_range ) {
605                wp_clear_scheduled_hook( 'akismet_schedule_cron_recheck' );
606                wp_schedule_single_event( time() + 300, 'akismet_schedule_cron_recheck' );
607        }
608}
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