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    streamWrapper::dir_readdir

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

    streamWrapper::dir_readdir — Read entry from directory handle

    Descrierea

    public streamWrapper::dir_readdir ( ) : string

    This method is called in response to readdir().

    Parametri

    Această funcție nu are parametri.

    Valorile întoarse

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

    Notă:

    The return value will be casted to string.

    Erori/Excepții

    Emite o eroare E_WARNING dacă apelul acestei metode eșuează (de ex. nu este implementată).

    Exemple

    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);
    ?>

    Exemplul de mai sus va afișa ceva similar cu:

    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"

    A se vedea și

    • readdir() - Read entry from directory handle

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