php 通过扫描证书获取到期时间

记录：通过扫码证书获取到期时间，需要安装OpenSSL拓展

    //查询入口
    public function getsslOp(){

        // 参数存到变量
        $scanpath = ROOT_PATH ."/public/ssl/";
        $scanexts = "crt";

        // 扫描 SSL 证书
        $exps = $this->scan_ssl_files($scanpath, $scanexts);
        if(count($exps) === 0) {
            echo "<pre>";
            return "未扫描到 SSL 证书，请检查目录是否存在，以及目录下是否有证书文件\n";
        }
        // 获取最长的域名
        $max_length = 0;
        foreach($exps as $key => $value) {
            if(mb_strwidth($key) > $max_length) {
                $max_length = mb_strwidth($key);
            }
        }

        // 遍历数组
        foreach($exps as $key => $value) {
            //判断证书状态
            $expired = "正常";
            $section_time = $value['end_time'] - time();
            $padding = str_repeat(" ", $max_length - mb_strwidth($key));
            if($section_time <= 2592000 && $section_time > 0){
                $expired = "一个月内将会过期"; 
            } elseif(count($value) == 0) {
                $expired = "无效";
            } elseif($section_time < 0) {
                $expired = "已经过期";
            }
            $end_time = $value['end_time'] !== 0 ? date("Y-m-d H:i:s", $value['end_time']) : 0;
            $begin_time = $value['begin_time'] !== 0 ? date("Y-m-d H:i:s", $value['begin_time']) : 0;
            $data[$key] = [
                'dn'  => $value['dn'],
                'begin_time'  => $begin_time,
                'end_time'  => $end_time,
                'status'    => $expired
            ];
        }
        echo '<pre>';print_r($data);
    }
    //获取ssl证书内容
    public function get_ssl_expire_time($file) {
        $cert = openssl_x509_parse(file_get_contents($file));
        $ssl_time['dn'] = $cert['subject']['CN']; //证书保护域名
        $ssl_time['begin_time'] = $cert['validFrom_time_t'];    //证书开始时间
        $ssl_time['end_time'] = $cert['validTo_time_t'];    //证书结束时间
        return $ssl_time ?? 0;
    }

    // 扫描目录下的所有 SSL 证书
    public function scan_ssl_files($dir, $extensionName = "crt") {
        if(!file_exists($dir)) return Array();
        if(is_file($dir)) return Array(basename($dir) => $this->get_ssl_expire_time($dir));
        $abspath = realpath($dir);
        $expiretime = Array();
        if($abspath) {
            $list = scandir($dir);
            foreach($list as $file) {
                if($file !== "." && $file !== "..") {
                    $ext = pathinfo("{$dir}{$file}");
                    if($ext['extension'] == $extensionName) {
                        $expiretime["{$file}"] = $this->get_ssl_expire_time("{$dir}{$file}");
                    }
                }
            }
        }
        return $expiretime;
    }

结果示例：