PHP 非法关键词过滤

   /**
     * 非法关键词过滤
     * $content 前台所传字符串
     * 调用--$this->illegalKeyword($content)
     */
    public function illegalKeyword($content)
    {
        header("Content-Type: text/html;charset=utf-8");
        
        //查询关键词表
        $keyword = $this->getData('keyword', array('state' => 1), 'name');
        foreach ($keyword as $k => $v) {
            $seek = strpos($content, $v['name']);
            if ($seek !== false) {
                $this->setReturnValue(0, '有非法词', $v['name']);
            }
        }
        return true;
    }