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<?php
/**
** Akismet Filter
** Akismet API: http://akismet.com/development/api/
**/
add_filter( 'wpcf7_spam', 'wpcf7_akismet', 10, 1 );
function wpcf7_akismet( $spam ) {
if ( $spam ) {
return $spam;
}
if ( ! wpcf7_akismet_is_available() ) {
return false;
}
if ( ! $params = wpcf7_akismet_submitted_params() ) {
return false;
}
$c = array();
$c['comment_author'] = $params['author'];
$c['comment_author_email'] = $params['author_email'];
$c['comment_author_url'] = $params['author_url'];
$c['comment_content'] = $params['content'];
$c['blog'] = get_option( 'home' );
$c['blog_lang'] = get_locale();
$c['blog_charset'] = get_option( 'blog_charset' );
$c['user_ip'] = $_SERVER['REMOTE_ADDR'];
$c['user_agent'] = $_SERVER['HTTP_USER_AGENT'];
$c['referrer'] = $_SERVER['HTTP_REFERER'];
// http://blog.akismet.com/2012/06/19/pro-tip-tell-us-your-comment_type/
$c['comment_type'] = 'contact-form';
if ( $permalink = get_permalink() ) {
$c['permalink'] = $permalink;
}
$ignore = array( 'HTTP_COOKIE', 'HTTP_COOKIE2', 'PHP_AUTH_PW' );
foreach ( $_SERVER as $key => $value ) {
if ( ! in_array( $key, (array) $ignore ) ) {
$c["$key"] = $value;
}
}
if ( wpcf7_akismet_comment_check( $c ) ) {
$spam = true;
$submission = WPCF7_Submission::get_instance();
$submission->add_spam_log( array(
'agent' => 'akismet',
'reason' => __( "Akismet returns a spam response.", 'contact-form-7' ),
) );
} else {
$spam = false;
}
return $spam;
}
function wpcf7_akismet_is_available() {
if ( is_callable( array( 'Akismet', 'get_api_key' ) ) ) {
return (bool) Akismet::get_api_key();
}
return false;
}
function wpcf7_akismet_submitted_params() {
$params = array(
'author' => '',
'author_email' => '',
'author_url' => '',
'content' => '',
);
$has_akismet_option = false;
foreach ( (array) $_POST as $key => $val ) {
if ( '_wpcf7' == substr( $key, 0, 6 )
or '_wpnonce' == $key ) {
continue;
}
if ( is_array( $val ) ) {
$val = implode( ', ', wpcf7_array_flatten( $val ) );
}
$val = trim( $val );
if ( 0 == strlen( $val ) ) {
continue;
}
if ( $tags = wpcf7_scan_form_tags( array( 'name' => $key ) ) ) {
$tag = $tags[0];
$akismet = $tag->get_option( 'akismet',
'(author|author_email|author_url)', true );
if ( $akismet ) {
$has_akismet_option = true;
if ( 'author' == $akismet ) {
$params[$akismet] = trim( $params[$akismet] . ' ' . $val );
continue;
} elseif ( '' == $params[$akismet] ) {
$params[$akismet] = $val;
continue;
}
}
}
$params['content'] .= "\n\n" . $val;
}
if ( ! $has_akismet_option ) {
return false;
}
$params['content'] = trim( $params['content'] );
return $params;
}
function wpcf7_akismet_comment_check( $comment ) {
$spam = false;
$query_string = wpcf7_build_query( $comment );
if ( is_callable( array( 'Akismet', 'http_post' ) ) ) {
$response = Akismet::http_post( $query_string, 'comment-check' );
} else {
return $spam;
}
if ( 'true' == $response[1] ) {
$spam = true;
}
if ( $submission = WPCF7_Submission::get_instance() ) {
$submission->akismet = array( 'comment' => $comment, 'spam' => $spam );
}
return apply_filters( 'wpcf7_akismet_comment_check', $spam, $comment );
}
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