Directory Functions

chdir — Change directory
chroot — Change the root directory
dir — Return an instance of the Directory class
closedir — Close directory handle
getcwd — Gets the current working directory
opendir — Open directory handle
readdir — Read entry from directory handle
rewinddir — Rewind directory handle
scandir — List files and directories inside the specified path

chdir

Directories

Last updated: Fri, 15 Aug 2008

add a note User Contributed Notes
Directory Functions

billy
18-Feb-2008 10:22


msh at onliners dot dk's code should have



$dir.'/'.$entry everywhere instead of $dir.$entry



you need your system's directory separator, otherwise you'll get /my/pathfilename instead of correctly /my/path/filename

Jean-Paul Wattiaux
01-Sep-2007 05:08


Mine works as long as the samba volume is actually mounted. Having it listed in the "My Computer" window doesn't warrant that.

adrian
20-Aug-2007 11:33


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.

phdwight at yahoo dot com
28-Mar-2007 05:45


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.

dkflbk at nm dot ru
15-Sep-2006 01:29


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));

?>

engin bzzzt biz
01-Feb-2006 09:07


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

msh at onliners dot dk
30-Jan-2006 12:49


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.

Nicolas Merlet - admin(at)merletn.org
22-Jan-2006 04:34


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 ) ;

}



?>

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chdir

Directories

Last updated: Fri, 15 Aug 2008

Directory Functions

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