(PHP 4 >= 4.3.2, PHP 5)
streamWrapper::dir_readdir — Read entry from directory handle
This method is called in response to readdir().
Esta função não contém parâmetros.
Should return string representing the next filename, or FALSE if there is no next file.
Nota: The return value will be casted to string .
Emite E_WARNING se uma chamada a esse método falhar (ex. não implementado).
Exemplo #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);
?>
O exemplo acima irá imprimir algo similar a:
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"