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    streamWrapper::dir_readdir

    (PHP 4 >= 4.3.2, PHP 5, PHP 7)

    streamWrapper::dir_readdir — Read entry from directory handle

    설명

    public string streamWrapper::dir_readdir ( void )

    This method is called in response to readdir().

    인수

    이 함수는 인수가 없습니다.

    반환값

    Should return string representing the next filename, or FALSE if there is no next file.

    Note:

    The return value will be casted to string.

    오류/예외

    이 메쏘드 호출을 실패했을 때 E_WARNING이 발생합니다. (즉, 구현되지 않음)

    예제

    Example #1 Listing files from tar archives

    <?php
    class streamWrapper {
        protected     $fp;

        public function     dir_opendir($path, $options) {
                $url = parse_url($path);

                $path = $url["host"] . $url["path"];

            if (!    is_readable($path)) {
                    trigger_error("$path isn't readable for me", E_USER_NOTICE);
                return     false;
            }
            if (!    is_file($path)) {
                    trigger_error("$path isn't a file", E_USER_NOTICE);
                return     false;
            }

                $this->fp = fopen($path, "rb");
            return     true;
        }

        public function     dir_readdir() {
                // Extract the header for this entry
                $header      = fread($this->fp, 512);
                $data = unpack("a100filename/a8mode/a8uid/a8gid/a12size/a12mtime/a8checksum/a1filetype/a100link/a100linkedfile", $header);

                // Trim the filename and filesize
                $filename    = trim($data["filename"]);

                // No filename? We are the end of the archive
                if (!$filename) {
                return     false;
            }

                $octal_bytes = trim($data["size"]);
                // Filesize is defined in octects
                $bytes       = octdec($octal_bytes);

                // tar rounds up filesizes up to multiple of 512 bytes (zero filled)
                $rest        = $bytes % 512;
            if (    $rest > 0) {
                    $bytes      += 512 - $rest;
            }

                // Seek over the file
                fseek($this->fp, $bytes, SEEK_CUR);

            return     $filename;
        }

        public function     dir_closedir() {
            return     fclose($this->fp);
        }

        public function     dir_rewinddir() {
            return     fseek($this->fp, 0, SEEK_SET);
        }
    }

    stream_wrapper_register("tar", "streamWrapper");
    $handle = opendir("tar://example.tar");
    while (    false !== ($file = readdir($handle))) {
            var_dump($file);
    }

    echo     "Rewinding..\n";
    rewind($handle);
    var_dump(readdir($handle));

    closedir($handle);
    ?>

    위 예제의 출력 예시:

    string(13) "construct.xml"
string(16) "dir-closedir.xml"
string(15) "dir-opendir.xml"
string(15) "dir-readdir.xml"
string(17) "dir-rewinddir.xml"
string(9) "mkdir.xml"
string(10) "rename.xml"
string(9) "rmdir.xml"
string(15) "stream-cast.xml"
string(16) "stream-close.xml"
string(14) "stream-eof.xml"
string(16) "stream-flush.xml"
string(15) "stream-lock.xml"
string(15) "stream-open.xml"
string(15) "stream-read.xml"
string(15) "stream-seek.xml"
string(21) "stream-set-option.xml"
string(15) "stream-stat.xml"
string(15) "stream-tell.xml"
string(16) "stream-write.xml"
string(10) "unlink.xml"
string(12) "url-stat.xml"
Rewinding..
string(13) "construct.xml"

    참고

    • readdir() - 디렉토리 핸들에서 엔트리를 읽습니다

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