Verzeichnis-Funktionen

Siehe auch

Für verwandte Funktionen wie zum Beispiel dirname(), is_dir(), mkdir() und rmdir(), lesen Sie auch das Filesystem-Kapitel.

Inhaltsverzeichnis

  • chdir — Wechseln des Verzeichnisses
  • chroot — Wechselt das Wurzelverzeichnis
  • closedir — Schließt ein Verzeichnis-Handle
  • dir — Liefert eine Instanz der Directory-Klasse
  • getcwd — Ermittelt das aktuelle Arbeitsverzeichnis
  • opendir — Öffnet ein Verzeichnis-Handle
  • readdir — Liest einen Eintrag aus einem Verzeichnis-Handle
  • rewinddir — Setzt das Verzeichnis-Handle an den Anfang zurück
  • scandir — Listet Dateien und Verzeichnisse innerhalb eines angegebenen Pfades auf
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User Contributed Notes 7 notes

up
4
dkflbk at nm dot ru
17 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));
?>
up
1
Nicolas Merlet - admin(at)merletn.org
18 years ago
Here is a very similar function to *scandir*, if you are still using PHP4...

This recursive function will return an indexed array containing all directories or files or both (depending on parameters). You can specify the depth you want, as explained below.

<?php

// $path : path to browse
// $maxdepth : how deep to browse (-1=unlimited)
// $mode : "FULL"|"DIRS"|"FILES"
// $d : must not be defined
 
function searchdir ( $path , $maxdepth = -1 , $mode = "FULL" , $d = 0 )
{
   if (
substr ( $path , strlen ( $path ) - 1 ) != '/' ) { $path .= '/' ; }     
  
$dirlist = array () ;
   if (
$mode != "FILES" ) { $dirlist[] = $path ; }
   if (
$handle = opendir ( $path ) )
   {
       while (
false !== ( $file = readdir ( $handle ) ) )
       {
           if (
$file != '.' && $file != '..' )
           {
              
$file = $path . $file ;
               if ( !
is_dir ( $file ) ) { if ( $mode != "DIRS" ) { $dirlist[] = $file ; } }
               elseif (
$d >=0 && ($d < $maxdepth || $maxdepth < 0) )
               {
                  
$result = searchdir ( $file . '/' , $maxdepth , $mode , $d + 1 ) ;
                  
$dirlist = array_merge ( $dirlist , $result ) ;
               }
       }
       }
      
closedir ( $handle ) ;
   }
   if (
$d == 0 ) { natcasesort ( $dirlist ) ; }
   return (
$dirlist ) ;
}

?>
up
-2
engin bzzzt biz
18 years ago
To join directory and file names in a cross-platform manner you can use the following function.

function join_path()
{
        $num_args = func_num_args();
        $args = func_get_args();
        $path = $args[0];
       
        if( $num_args > 1 )
        {
            for ($i = 1; $i < $num_args; $i++)
            {
                $path .= DIRECTORY_SEPARATOR.$args[$i];
            }
        }
       
        return $path;
}

It should do the following:
$src = join_path( '/foo', 'bar', 'john.jpg' );
echo $src; // On *nix -> /foo/bar/john.jpg

$src = join_path( 'C:\www', 'domain.com', 'foo.jpg' );
echo $src; // On win32 -> C:\\www\\domain.com\\foo.jpg
up
-4
msh at onliners dot dk
18 years ago
I would like to present these two simple functions for generating a complete directory listing - as I feel the other examples are to restrictive in terms of usage.

function dirTree($dir) {
    $d = dir($dir);
    while (false !== ($entry = $d->read())) {
        if($entry != '.' && $entry != '..' && is_dir($dir.$entry))
            $arDir[$entry] = dirTree($dir.$entry.'/');
    }
    $d->close();
    return $arDir;
}

function printTree($array, $level=0) {
    foreach($array as $key => $value) {
        echo "<div class='dir' style='width: ".($level*20)."px;'>&nbsp;</div>".$key."<br/>\n";
        if(is_array($value))
            printTree($value, $level+1);
    }
}

Usage is as simple as this:
$dir = "<any directory you like>";
$arDirTree = dirTree($dir);
printTree($arDirTree);

It is easy to add files to the tree also - so enjoy.
up
-3
Jean-Paul Wattiaux
16 years ago
Mine works as long as the samba volume is actually mounted. Having it listed in the "My Computer" window doesn't warrant that.
up
-4
adrian
16 years ago
Samba mounts under a Windows environment are not accessible using the mounted drive letter. For instance, if you have drive X: in Windows mounted to //example.local/shared_dir (where example.local is a *nix box running Samba), the following constructs

$dir = "X:\\data\\";
$handle = opendir( $dir );
or
$d = dir( $dir );

will return a warning message "failed to open dir: No error"

On the other hand, using the underlying mapping info works just fine. For example:

$dir = "//example.local/shared_dir/data";
$handle = opendir( $dir );
or
$d = dir( $dir );

Both cases do what they're expected to.
up
-15
phdwight at yahoo dot com
16 years ago
I have posted this same observation in scandir, and found out that it is not limited to scandir alone but to ALL directory functions.

Directory functions DOES NOT currently supports Japanese characters.
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