Funciones de directorio

Ver también

Para funciones relacionadas, como dirname(), is_dir(), mkdir(), y rmdir(), visita Filesystem sección.

Tabla de contenidos

  • chdir — Cambia de directorio
  • chroot — Cambia el directorio raíz
  • closedir — Cierra un gestor de directorio
  • dir — Devuelve una instancia de la clase Directory
  • getcwd — Obtiene el directorio actual en donde se esta trabajando
  • opendir — Abre un gestor de directorio
  • readdir — Lee una entrada desde un gestor de directorio
  • rewinddir — Regresar el gestor de directorio
  • scandir — Enumera los ficheros y directorios ubicados en la ruta especificada
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User Contributed Notes 1 note

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dkflbk at nm dot ru
18 years ago
I wrote a simple backup script which puts all files in his folder (and all of the sub-folders) in one TAR archive...
(It's classic TAR format not USTAR, so filename and path to it can't be longer then 99 chars)
<?php
/***********************************************************
* Title: Classic-TAR based backup script v0.0.1-dev
**********************************************************/

Class Tar_by_Vladson {
var
$tar_file;
var
$fp;
function
Tar_by_Vladson($tar_file='backup.tar') {
$this->tar_file = $tar_file;
$this->fp = fopen($this->tar_file, "wb");
$tree = $this->build_tree();
$this->process_tree($tree);
fputs($this->fp, pack("a512", ""));
fclose($this->fp);
}
function
build_tree($dir='.'){
$handle = opendir($dir);
while(
false !== ($readdir = readdir($handle))){
if(
$readdir != '.' && $readdir != '..'){
$path = $dir.'/'.$readdir;
if (
is_file($path)) {
$output[] = substr($path, 2, strlen($path));
} elseif (
is_dir($path)) {
$output[] = substr($path, 2, strlen($path)).'/';
$output = array_merge($output, $this->build_tree($path));
}
}
}
closedir($handle);
return
$output;
}
function
process_tree($tree) {
foreach(
$tree as $pathfile ) {
if (
substr($pathfile, -1, 1) == '/') {
fputs($this->fp, $this->build_header($pathfile));
} elseif (
$pathfile != $this->tar_file) {
$filesize = filesize($pathfile);
$block_len = 512*ceil($filesize/512)-$filesize;
fputs($this->fp, $this->build_header($pathfile));
fputs($this->fp, file_get_contents($pathfile));
fputs($this->fp, pack("a".$block_len, ""));
}
}
return
true;
}
function
build_header($pathfile) {
if (
strlen($pathfile) > 99 ) die('Error');
$info = stat($pathfile);
if (
is_dir($pathfile) ) $info[7] = 0;
$header = pack("a100a8a8a8a12A12a8a1a100a255",
$pathfile,
sprintf("%6s ", decoct($info[2])),
sprintf("%6s ", decoct($info[4])),
sprintf("%6s ", decoct($info[5])),
sprintf("%11s ",decoct($info[7])),
sprintf("%11s", decoct($info[9])),
sprintf("%8s", " "),
(
is_dir($pathfile) ? "5" : "0"),
"",
""
);
clearstatcache();
$checksum = 0;
for (
$i=0; $i<512; $i++) {
$checksum += ord(substr($header,$i,1));
}
$checksum_data = pack(
"a8", sprintf("%6s ", decoct($checksum))
);
for (
$i=0, $j=148; $i<7; $i++, $j++)
$header[$j] = $checksum_data[$i];
return
$header;
}
}

header('Content-type: text/plain');
$start_time = array_sum(explode(chr(32), microtime()));
$tar = & new Tar_by_Vladson();
$finish_time = array_sum(explode(chr(32), microtime()));
printf("The time taken: %f seconds", ($finish_time - $start_time));
?>
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