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<?php
/**
** Akismet Filter
** Akismet API: http://akismet.com/development/api/
**/
add_filter( 'wpcf7_spam', 'wpcf7_akismet' );
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();
if ( ! empty( $params['author'] ) )
$c['comment_author'] = $params['author'];
if ( ! empty( $params['author_email'] ) )
$c['comment_author_email'] = $params['author_email'];
if ( ! empty( $params['author_url'] ) )
$c['comment_author_url'] = $params['author_url'];
if ( ! empty( $params['content'] ) )
$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'] = preg_replace( '/[^0-9., ]/', '', $_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;
}
return wpcf7_akismet_comment_check( $c );
}
function wpcf7_akismet_is_available() {
if ( is_callable( array( 'Akismet', 'get_api_key' ) ) ) { // Akismet v3.0+
return (bool) Akismet::get_api_key();
}
if ( function_exists( 'akismet_get_key' ) ) {
return (bool) akismet_get_key();
}
return false;
}
function wpcf7_akismet_submitted_params() {
$params = array(
'author' => '',
'author_email' => '',
'author_url' => '' );
$content = '';
$fes = wpcf7_scan_shortcode();
foreach ( $fes as $fe ) {
if ( ! isset( $fe['name'] ) || ! isset( $_POST[$fe['name']] ) )
continue;
$value = $_POST[$fe['name']];
if ( is_array( $value ) )
$value = implode( ', ', wpcf7_array_flatten( $value ) );
$value = trim( $value );
$options = (array) $fe['options'];
if ( preg_grep( '%^akismet:author$%', $options ) ) {
$params['author'] = trim( $params['author'] . ' ' . $value );
} elseif ( preg_grep( '%^akismet:author_email$%', $options ) ) {
if ( '' == $params['author_email'] )
$params['author_email'] = $value;
} elseif ( preg_grep( '%^akismet:author_url$%', $options ) ) {
if ( '' == $params['author_url'] )
$params['author_url'] = $value;
}
$content = trim( $content . "\n\n" . $value );
}
$params = array_filter( $params );
if ( ! $params )
return false;
$params['content'] = $content;
return $params;
}
function wpcf7_akismet_comment_check( $comment ) {
global $akismet_api_host, $akismet_api_port;
$spam = false;
$query_string = wpcf7_build_query( $comment );
if ( is_callable( array( 'Akismet', 'http_post' ) ) ) { // Akismet v3.0+
$response = Akismet::http_post( $query_string, 'comment-check' );
} else {
$response = akismet_http_post( $query_string, $akismet_api_host,
'/1.1/comment-check', $akismet_api_port );
}
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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