How To Automatically Refuse Comment without Plugin

For many year Spam is the big enemy on internet, there are so many way to Automatically Refuse Comment, some tricks need installed some plugin such as Akismet, WP-Spamfree, Bad Behavior and many more, But I will show you how to do this without Plugin, all need to do only added some code on functions.php on your themes.

This code is original created by Guy and republish by WP Recipes, let’s get started

function in_comment_post_like($string, $array) {
	foreach($array as $ref) { if(strstr($string, $ref)) { return true; } }
	return false;
}
function drop_bad_comments() {
	if (!empty($_POST['comment'])) {
		$post_comment_content = $_POST['comment'];
		$lower_case_comment = strtolower($_POST['comment']);
		$bad_comment_content = array(
			'viagra',
			'hydrocodone',
			'hair loss',
			'[url=http',
			'[link=http',
			'xanax',
			'tramadol',
			'russian girls',
			'russian brides',
			'lorazepam',
			'adderall',
			'dexadrine',
			'no prescription',
			'oxycontin',
			'without a prescription',
			'sex pics',
			'family incest',
			'online casinos',
			'online dating',
			'cialis',
			'best forex',
			'amoxicillin'
		);
		if (in_comment_post_like($lower_case_comment, $bad_comment_content)) {
			$comment_box_text = wordwrap(trim($post_comment_content), 80, "n  ", true);
			$txtdrop = fopen('/var/log/httpd/wp_post-logger/nullamatix.com-text-area_dropped.txt', 'a');
			fwrite($txtdrop, "  --------------n  [COMMENT] = " . $post_comment_content . "n  --------------n");
			fwrite($txtdrop, "  [SOURCE_IP] = " . $_SERVER['REMOTE_ADDR'] . " @ " . date("F j, Y, g:i a") . "n");
			fwrite($txtdrop, "  [USERAGENT] = " . $_SERVER['HTTP_USER_AGENT'] . "n");
			fwrite($txtdrop, "  [REFERER  ] = " . $_SERVER['HTTP_REFERER'] . "n");
			fwrite($txtdrop, "  [FILE_NAME] = " . $_SERVER['SCRIPT_NAME'] . " - [REQ_URI] = " . $_SERVER['REQUEST_URI'] . "n");
			fwrite($txtdrop, '--------------**********------------------'."n");
			header("HTTP/1.1 406 Not Acceptable");
			header("Status: 406 Not Acceptable");
			header("Connection: Close");
			wp_die( __('bang bang.') );
		}
	}
}
add_action('init', 'drop_bad_comments');

Save your functions.php and done I hope this code about How To Automatically Refuse Comment without Plugin will help you to trow away your SPAM Comment. You can extend the words by added more array on code above