自定义filter

    class md5_filter extends php_user_filter{

        public function filter($in,$out,&$consumed,$closing){

            while($bucket = stream_bucket_make_writeable($in)){

                $bucket->data = md5($bucket->data);

                $consumed += $bucket->datalen;

                stream_bucket_append($out,$bucket);

            }

            //允许其他管道使用

            return PSFS_PASS_ON;

        }

    }

    //注册进入过滤器

    stream_filter_register('string.md5','md5_filter');

    //print_r(stream_get_filters());

    //使用

    $file_path = dirname(__FILE__).DIRECTORY_SEPARATOR.'test.txt';

    $fp = fopen($file_path,"w+");

    stream_filter_append($fp,"string.md5",STREAM_FILTER_WRITE);

    $txt = "hello \n";

    fwrite($fp,$txt);

    rewind($fp);

    fpassthru($fp);

    fclose($fp);
巴特西

自定义filter

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