Akismet SPAM Check for Question2Answer

qa-plugin.php

<?php
/*
	File: qa-plugin/webinoly-custom/qa-plugin.php
	Description: Anti SPAM Registration Plugin for Question2Answer
	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.
	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.
*/

/*
 	Plugin Name: Akismet Spam
	Plugin URI: https://webinoly.com/support/
	Plugin Description: Anti SPAM Plugin for Question2Answer
	Plugin Version: 1.0
	Plugin Date: 2019-06-5
	Plugin Author: QROkes
	Plugin Author URI: https://qrokes.com/en/
	Plugin License: GPLv2
	Plugin Minimum Question2Answer Version: 1.8.0
	Plugin Update Check URI:
*/


if (!defined('QA_VERSION')) { // don't allow this page to be requested directly from browser
	header('Location: ../../');
	exit;
}

qa_register_plugin_module( 'filter', 'qa-spam-akismet.php', 'qa_akismet', 'Q2A Spam Akismet' );

qa-spam-akismet.php

<?php
// https://akismet.com/development/api/#comment-check

class qa_akismet {

	function akismet_comment_check( $data ) {
		$key = '123456789';
		$data['blog'] = "https://domain.com/forum/";
                $data['user_agent'] = "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6";
		$data['user_ip'] = qa_remote_ip_address();
		if( empty($data['comment_author']) ){$data['comment_author']=qa_get_logged_in_handle();}
		if( empty($data['comment_author_email']) ){$data['comment_author_email']=qa_get_logged_in_email();}
		
		$request = 'blog='. urlencode($data['blog']) .
				   '&user_ip='. urlencode($data['user_ip']) .
				   '&user_agent='. urlencode($data['user_agent']) .
				   '&comment_type='. urlencode($data['comment_type']) .
				   '&comment_author='. urlencode($data['comment_author']) .
				   '&comment_author_email='. urlencode($data['comment_author_email']) .
				   '&comment_content='. urlencode($data['comment_content']);
		$host = $http_host = $key.'.rest.akismet.com';
		$path = '/1.1/comment-check';
		$port = 443;
		$akismet_ua = "Question2Answer | Community Forum";
		$content_length = strlen( $request );
		$http_request  = "POST $path HTTP/1.0\r\n";
		$http_request .= "Host: $host\r\n";
		$http_request .= "Content-Type: application/x-www-form-urlencoded\r\n";
		$http_request .= "Content-Length: {$content_length}\r\n";
		$http_request .= "User-Agent: {$akismet_ua}\r\n";
		$http_request .= "\r\n";
		$http_request .= $request;
		$response = '';
		if( false != ( $fs = @fsockopen( 'ssl://' . $http_host, $port, $errno, $errstr, 10 ) ) ) {
			 
			fwrite( $fs, $http_request );
		 
			while ( !feof( $fs ) )
				$response .= fgets( $fs, 1160 ); // One TCP-IP packet
			fclose( $fs );
			 
			$response = explode( "\r\n\r\n", $response, 2 );
		}
		
		// Passes back true (it's spam) or false (it's ham)
		if ( 'true' == $response[1] )
			return true;
		else
			return false;
	}

	function filter_question(&$question, &$errors, $oldquestion) {
		// Don't check for admins and known users
		if (( is_numeric(qa_get_logged_in_level()) and qa_get_logged_in_level() > 49 ) || (is_numeric(qa_get_logged_in_points()) and qa_get_logged_in_points() > 200))
			return;

		// combine question title and content for spam processing
		$combined_content = $question['title'].' '.$question['text'];
		$check_content = array(
			'comment_type' => 'forum-post',
			'comment_author_email' => $question['email'],
			'comment_content'      => $combined_content
		);
	
		if (self::akismet_comment_check($check_content)) {
			$question['queued']=true;
		}
	}
	
	function filter_answer(&$answer, &$errors, $question, $oldanswer) {
		// Don't check for admins and known users
		if (( is_numeric(qa_get_logged_in_level()) and qa_get_logged_in_level() > 49 ) || (is_numeric(qa_get_logged_in_points()) and qa_get_logged_in_points() > 200))
			return;

		$check_content = array(
			'comment_type' => 'reply',
			'comment_author_email' => $answer['email'],
			'comment_content' => $answer['text']
		);
		
		if (self::akismet_comment_check($check_content)) {
			$answer['queued']=true;
		}
	}
	
	function filter_comment(&$comment, &$errors, $question, $parent, $oldcomment) {
		// Don't check for admins and known users
		if (( is_numeric(qa_get_logged_in_level()) and qa_get_logged_in_level() > 49 ) || (is_numeric(qa_get_logged_in_points()) and qa_get_logged_in_points() > 200))
			return;

		$check_content = array(
			'comment_type' => 'reply',
			'comment_author_email' => $comment['email'],
			'comment_content' => $comment['text']
		);
	
		if (self::akismet_comment_check($check_content)) {
			$comment['queued']=true;
		}
	}

}

Hey,
Thank you, where to get the "key" from ?

@thierryzoller "key" is the API-Key for Akismet service.