POST SPAM 対策を考える :: XOOPS マニア

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	// POST SPAM Check
	function PostSpam_Check($post)
	{
		static $filters = NULL;
		if (is_null($filters)) {$filters = HypCommonFunc[4]::PostSpam_filter();}
		$counts = array();
		$counts[0] = $counts[1] = $counts[2] = $counts[3] = 0;
		foreach($post as $dat)
		{
			$tmp = array();
			$tmp['a'] = $tmp['bb'] = $tmp['url'] = $tmp['filter'] = 0;
			if (is_array($dat))
			{
				list($tmp['a'],$tmp['bb'],$tmp['url'],$tmp['filter']) = HypCommonFunc[4]::PostSpam_Check($dat);
			}
			else
			{
				// <a> タグの個数
				$tmp['a'] = count(preg_split("/<a.+?\/a>/i",$dat)) - 1;
				// [url] タグの個数
				$tmp['bb'] = count(preg_split("/\[url=.+?\/url\]/i",$dat)) - 1;
				// URL の個数
				$tmp['url'] = count(preg_split("/(ht&#x7c;f)tps?:\/\/[^\s]+/i",$dat)) - 1;
				// フィルター
				if ($filters)
				{
					foreach($filters as $reg => $point)
					{
						$counts[3] += (count(preg_split($reg,$dat)) - 1) * $point;
						//echo $dat."<br>".$reg.": ".$counts[3]."<hr>";
					}
				}
			}
			$counts[0] += $tmp['a'];
			$counts[1] += $tmp['bb'];
			$counts[2] += $tmp['url'];
			$counts[3] += $tmp['filter'];
		}
		return $counts;
	}
	
	// POST SPAM フィルター
	function PostSpam_filter($reg="", $point=1)
	{
		static $regs = array();
		if (empty($reg)) {return $regs;}
		$regs[$reg] = $point;
	}
	
	// POST SPAM Check 汎用関数
	function get_postspam_avr($alink=1,$bb=1,$url=1)
	{
		if ($_SERVER['REQUEST_METHOD'] == 'POST')
		{
			list($a_p,$bb_p,$url_p,$filter_p) = HypCommonFunc[4]::PostSpam_Check($_POST);
			return $a_p * $alink + $bb_p * $bb + $url_p * $url + $filter_p;
		}
		else
		{
			return 0;
		}
	}

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	// PostSpam をチェック by nao-pon[7]
	HypCommonFunc[4]::PostSpam_filter("/((?:ht&#x7c;f)tps?:\/\/[!~*'();\/?:\@&=+\$,%#\w.-]+).*?<a.+?\\1.+?\/a>.*?\[url=\\1.+?\/url\]/is", 11);
	if (!is_object($xoopsUser))
	{
		if (HypCommonFunc[4]::get_postspam_avr() > 15)
		{
			header("Location: ".XOOPS_URL."/");
			exit();
		}
	}
	else if (!$xoopsUserIsAdmin)
	{
		if (HypCommonFunc[4]::get_postspam_avr() > 30)
		{
			header("Location: ".XOOPS_URL."/");
			exit();
		}
	}