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rewinddir> <opendir
Last updated: Fri, 11 Apr 2008

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readdir

(PHP 4, PHP 5)

readdir — Legge una voce dall'handle della directory

Descrizione

string readdir ( resource $dir_handle )

Restituisce il nomefile del file successivo della directory. I nomi dei file vengono restituiti secondo l'ordine in cui sono memorizzati nel filesystem.

Si faccia caso al modo in cui il valore restituito da readdir() viene controllato negli esempi successivi. Viene controllato esplicitamente che il valore restituito sia identico a (uguale a e dello stesso tipo di (vedere Comparison Operators per maggiori informazioni) FALSE altrimenti avverrebbe che ogni nome di directory il cui nome fosse valutato FALSE interromperebbe il loop (per esempio una directory chiamata "0").

Example #1 Elenca tutti i file presenti in una directory

<?php
// Nota che l'operatore !== non è esistito fino alla versione 4.0.0-RC2
if ($handle = opendir('/percorso/ai/file')) {
    echo "Handle della directory: $handle\n";
    echo "File:\n";

   /* Questa è la maniera corretta di eseguire un loop all'interno di una directory. */
   while (false !== ($file = readdir($handle))) { 
       echo "$file\n";
   }

   /* Questa è la maniera SCORRETTA di eseguire un loop all'interno di una directory. */
   while ($file = readdir($handle)) { 
       echo "$file\n";
   }

   closedir($handle); 
}
?>

Nota che readdir() restituirà le voci . e ... Se non si vogliono ottenere queste, si possono semplicemente eliminare:

Example #2 Elenca tutti i file della directory in uso ed elimina . e ..

<?php 
if ($handle = opendir('.')) {
    while (false !== ($file = readdir($handle))) { 
        if ($file != "." && $file != "..") { 
            echo "$file\n"; 
        } 
    }
    closedir($handle); 
}
?>

Vedere anche: is_dir() e glob().



rewinddir> <opendir
Last updated: Fri, 11 Apr 2008
 
add a note add a note User Contributed Notes
readdir
Kim Christensen
05-May-2008 08:14
Handy little function that returns the number of files (not directories) that exists under a directory.
Choose if you want the function to recurse through sub-directories with the second parameter -
the default mode (false) is just to count the files directly under the supplied path.

<?php

  /**
   * Return the number of files that resides under a directory.
   *
   * @return integer
   * @param    string (required)   The directory you want to start in
   * @param    boolean (optional)  Recursive counting. Default to FALSE.
   * @param    integer (optional)  Initial value of file count
   */ 

  function num_files($dir, $recursive=false, $counter=0) {
    static $counter;
    if(is_dir($dir)) {
      if($dh = opendir($dir)) {
        while(($file = readdir($dh)) !== false) {
          if($file != "." && $file != "..") {
              $counter = (is_dir($dir."/".$file)) ? num_files($dir."/".$file, $recursive, $counter) : $counter+1;
          }
        }
        closedir($dh);
      }
    }
    return $counter;
  }

  // Usage:
  $nfiles = num_files("/home/kchr", true); // count all files that resides under /home/kchr, including subdirs
  $nfiles = num_files("/tmp"); // count the files directly under /tmp

?>
info at agentur-obermaier dot de
15-Apr-2008 04:13
This is a nice quick full dir read - sorry for my bad english ;)

function ReadDirs($dir,$em){
    if ($handle = opendir($dir)) {
    while (false !== ($file = readdir($handle))) {
        if ($file != "." && $file != ".." && $file != "Thumb.db") {
            if(is_dir($dir.$file)){
                echo $em."&raquo; ".$file.'<br>';
                ReadDirs($dir.$file."/",$em."&nbsp;&nbsp;");
            }
        }
    }
    closedir($handle);
}
}
dbzfanatic_1 at hotmail dot com
18-Mar-2008 10:03
Here's an easy way to output the contents as a list of download links.

<?php
$count = 0;
if ($handle = opendir('.')) {
    while (false !== ($file = readdir($handle))) {
        if ($file != "." && $file != "..") {$count++;
            print("<a href=\"".$file."\">".$file."</a><br />\n");
        }
    }
echo '<br /><br /><a href="..">Return</a>';
    closedir($handle);
}
?>

and simply use $count to list the overall number of files.
singh206 at gmail dot com
15-Nov-2007 01:15
Oops, made a few syntactical errors in the last example of getting only the final directory paths from a root dir.  PHP 4 OO.

    var $rootDir = '/SOME DIRECTORY';
   
    print_r($this->getFinalDirs($this->rootDir));   
   
    function getFinalDirs($root)
    {
        return $this->getNext($root);
    }
   
    function getNext($path)
    {
        static $dirs = array();
        $handle = opendir($path);
        if($handle)
        {
            while (false!==($dir=readdir($handle)))
            {
                if ($dir!='.'&&$dir!='..'&& $dir!='.DS_Store')
                {
                    if(is_dir($path.'/'.$dir))
                    {
                        $this->getNext($path.'/'.$dir);
                    } else
                    {
                        array_push($dirs, $path);
                        break;
                    }
                }
            }
        }
        return $dirs;
    }
Anonymous
14-Nov-2007 07:54
for ( $files = array(); ( $file = readdir( $handle )) !== false; $files[] = $file );
skysama at googles_email dot com
12-Sep-2007 10:23
Yet another view files by extension

/* NOTE:
 *  /a-d = do not include directories
 *  /b   = show files in bare mode ( no dates or filesize )
 */

<?php
$dir = '.\\img\\';    // reminder: escape your slashes
$filetype = "*.png";
$filelist = shell_exec( "dir {$dir}{$filetype} /a-d /b" );
$file_arr = explode( "\n", $filelist );
array_pop( $file_arr ); // last line is always blank
print_r( $file_arr );
?>
minisprinter (at) naver (dot) com
21-Aug-2007 04:09
The following code is a bit nasty, it can be used to remove all files generated by apache.

You're not a root user on a system, but you sometimes need to remove all files generated by apache in a certain directory. You may use this after replacing 'bbs' at the bottom with 'directory' you want.

It tries to remove all files in a directory, but it can't unless it has an ownership. it doesn't check the ownership or permission.

<?php

function remove($dirname = '.')
{
        if (is_dir($dirname))
        {
                echo "$dirname is a directory.<br />";

                if ($handle = @opendir($dirname))
                {
                        while (($file = readdir($handle)) !== false)
                        {
                                if ($file != "." && $file != "..")
                                {
                                        echo "$file<br />";

                                        $fullpath = $dirname . '/' . $file;

                                        if (is_dir($fullpath))
                                        {
                                                remove($fullpath);
                                                @rmdir($fullpath);
                                        }
                                        else
                                        {
                                                @unlink($fullpath);
                                        }
                                }
                        }
                        closedir($handle);
                }
        }
}

remove('bbs');

?>
nullbyte at hotmail dot com
20-Aug-2007 12:06
I haven't tested this yet, but it seems like it'll do just fine if you need files of a certain extension:

$dh = opendir($options['inputDir']);
$files = array();
while (($filename = readdir($dh)) !== false)
{
    if (substr($filename, strrpos($filename, '.')) == $options['inputExt'])
    {
        $files[] = $filename;
    }
}
closedir($dh);
moehbass at gmail dot com
12-Jul-2007 10:25
PLease disregard my last two posts. For the last one, if you're looking for files with .php extension, you also get files with any extension that ends with 'p'. I wrote the function in quite a haste and now I am too busy to fix it - so don't use it! it's no good.
moehbass at gmail dot com
12-Jul-2007 08:53
Sorry,
In my last post, if you only want to list files with certain extensions, then see how many letters this extension is, add one to it, and subtract it from the strlen of the file name. Review script below for details.
moehbass at gmail dot com
12-Jul-2007 08:27
Responding to:
johan dot mickelin at gmail dot com
31-May-2007 07:52
-------------------------------------------------------
If you want to list only a certain filetype, this case only jpg and gif files in an image directory

$dir = opendir ("../images");
        while (false !== ($file = readdir($dir))) {
                if (strpos($file, '.gif',1)||strpos($file, '.jpg',1) ) {
                    echo "$file <br />";
                }
        }
-----------------------------------------------------------------

This function would also echo files that have .gif or .jpg in their names such as myFile.gif.php (I don't know why I'd name a file like that, but I am just making a point, that's all folks!)
Perhaps a more exact way is to do the following:
...
while (false !== ($file = readdir($dir))) {
        $lenOfFileName = strlen($file);
        $extOffsetPos = $lenOfFileName - 5;
         if (strpos($file, '.gif', $extOffsetPos) ||
             strpos($file, '.jpg',$extOffsetPos) ) {
                    echo "$file <br />";
          }
...
If your extensions are more than three letters, then increase the 5 to 6 (e.g. aspx) to 7 (e.g. php51) or whatever.
johan dot mickelin at gmail dot com
31-May-2007 07:52
If you want to list only a certain filetype, this case only jpg and gif files in an image directory

$dir = opendir ("../images");
        while (false !== ($file = readdir($dir))) {
                if (strpos($file, '.gif',1)||strpos($file, '.jpg',1) ) {
                    echo "$file <br />";
                }
        }
schursin at gmail[deleteme] dot com
27-May-2007 06:42
code:

<?php

        function permission($filename)
        {
            $perms = fileperms($filename);

            if     (($perms & 0xC000) == 0xC000) { $info = 's'; }
            elseif (($perms & 0xA000) == 0xA000) { $info = 'l'; }
            elseif (($perms & 0x8000) == 0x8000) { $info = '-'; }
            elseif (($perms & 0x6000) == 0x6000) { $info = 'b'; }
            elseif (($perms & 0x4000) == 0x4000) { $info = 'd'; }
            elseif (($perms & 0x2000) == 0x2000) { $info = 'c'; }
            elseif (($perms & 0x1000) == 0x1000) { $info = 'p'; }
            else                                 { $info = 'u'; }

            // владелец
            $info .= (($perms & 0x0100) ? 'r' : '-');
            $info .= (($perms & 0x0080) ? 'w' : '-');
            $info .= (($perms & 0x0040) ? (($perms & 0x0800) ? 's' : 'x' ) : (($perms & 0x0800) ? 'S' : '-'));

            // группа
            $info .= (($perms & 0x0020) ? 'r' : '-');
            $info .= (($perms & 0x0010) ? 'w' : '-');
            $info .= (($perms & 0x0008) ? (($perms & 0x0400) ? 's' : 'x' ) : (($perms & 0x0400) ? 'S' : '-'));

            // все
            $info .= (($perms & 0x0004) ? 'r' : '-');
            $info .= (($perms & 0x0002) ? 'w' : '-');
            $info .= (($perms & 0x0001) ? (($perms & 0x0200) ? 't' : 'x' ) : (($perms & 0x0200) ? 'T' : '-'));

            return $info;
        }

        function dir_list($dir)
        {
            if ($dir[strlen($dir)-1] != '/') $dir .= '/';

            if (!is_dir($dir)) return array();

            $dir_handle  = opendir($dir);
            $dir_objects = array();
            while ($object = readdir($dir_handle))
                if (!in_array($object, array('.','..')))
                {
                    $filename    = $dir . $object;
                    $file_object = array(
                                            'name' => $object,
                                            'size' => filesize($filename),
                                            'perm' => permission($filename),
                                            'type' => filetype($filename),
                                            'time' => date("d F Y H:i:s", filemtime($filename))
                                        );
                    $dir_objects[] = $file_object;
                }

            return $dir_objects;
        }

?>

call:

<?php

        print_r(dir_list('/path/to/you/dir/'));

?>

output sample:

Array
(
    [0] => Array
        (
            [name] => api
            [size] => 0
            [perm] => drwxrwxrwx
            [type] => dir
            [time] => 28 May 2007 01:55:02
        )

    [1] => Array
        (
            [name] => classes
            [size] => 0
            [perm] => drwxrwxrwx
            [type] => dir
            [time] => 26 May 2007 00:56:44
        )

    [2] => Array
        (
            [name] => config.inc.php
            [size] => 143
            [perm] => -rw-rw-rw-
            [type] => file
            [time] => 26 May 2007 13:13:19
        )

    [3] => Array
        (
            [name] => index.php
            [size] => 131
            [perm] => -rw-rw-rw-
            [type] => file
            [time] => 26 May 2007 22:15:18
        )

    [4] => Array
        (
            [name] => modules
            [size] => 0
            [perm] => drwxrwxrwx
            [type] => dir
            [time] => 28 May 2007 00:47:40
        )

    [5] => Array
        (
            [name] => temp
            [size] => 0
            [perm] => drwxrwxrwx
            [type] => dir
            [time] => 28 May 2007 04:49:33
        )

)
(Qube#php@Efnet)
15-May-2007 08:36
<?php

// Sample function to recursively return all files within a directory.
// http://www.pgregg.com/projects/php/code/recursive_readdir.phps

Function listdir($start_dir='.') {

  $files = array();
  if (is_dir($start_dir)) {
    $fh = opendir($start_dir);
    while (($file = readdir($fh)) !== false) {
      # loop through the files, skipping . and .., and recursing if necessary
      if (strcmp($file, '.')==0 || strcmp($file, '..')==0) continue;
      $filepath = $start_dir . '/' . $file;
      if ( is_dir($filepath) )
        $files = array_merge($files, listdir($filepath));
      else
        array_push($files, $filepath);
    }
    closedir($fh);
  } else {
    # false if the function was called with an invalid non-directory argument
    $files = false;
  }

  return $files;

}

$files = listdir('.');
print_r($files);
?>
(Qube#php@Efnet)
14-May-2007 02:41
Here is an updated version of preg_find() [which has been linked from the glob() man page for years] - this function should provide most of what you want back from reading files, directories, different sorting methods, recursion, and perhaps most powerful of all the ability to pattern match with a PCRE regex.

You can get preg_find here: http://www.pgregg.com/projects/php/preg_find/preg_find.php.txt
or if you prefer colourful .phps format: http://www.pgregg.com/projects/php/preg_find/preg_find.phps
or scoll down to the end of this note.

I wrote several examples on how to use it on my blog at: http://www.pgregg.com/forums/viewtopic.php?tid=73

simple glob() type replacement:
$files = preg_find('/./', $dir);

recursive?
$files = preg_find('/./', $dir, PREG_FIND_RECURSIVE);

pattern match? find all .php files:
$files = preg_find('/\.php$/D', $dir, PREG_FIND_RECURSIVE);

sorted alphabetically?
$files = preg_find('/\.php$/D', $dir, PREG_FIND_RECURSIVE|PREG_FIND_SORTKEYS);

sorted in by filesize, in descending order?
$files = preg_find('/./', $dir,
  PREG_FIND_RECURSIVE|PREG_FIND_RETURNASSOC |PREG_FIND_SORTFILESIZE|PREG_FIND_SORTDESC);
$files=array_keys($files);

sorted by date modified?
$files = preg_find('/./', $dir,
  PREG_FIND_RECURSIVE|PREG_FIND_RETURNASSOC |PREG_FIND_SORTMODIFIED);
$files=array_keys($files);

Ok, the PHP note says my note is too long, so please click on one of the above links to get it.
phpwizard-at-pech-dot-cz
04-Jul-2002 01:22
It should work, but it'll be better to read section 13.1.3 Cache-control Mechanisms of RFC 2616 available at http://rfc.net/rfc2616.html before you start with confusing proxies on the way from you and the client.

Reading it is the best way to learn how proxies work, what should you do to modify cache-related headers of your documents and what you should never do again. :-)

And of course not reading RFCs is the best way to never learn how internet works and the best way to behave like Microsoft corp.

Have a nice day!
Jirka Pech
fridh at gmx dot net
09-Apr-2002 05:41
Someone mentioned the infinite recursion when a symbolic link was found...

tip: is_link() is a nice function :)
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rewinddir> <opendir
Last updated: Fri, 11 Apr 2008
 
 
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