Web студия "GrandView"

Описание

string readdir ( resource dir_handle )

Возвращает имя следующего по порядку элемента каталога. Имена элементов возвращаются в порядке, зависящем от файловой системы.

Обратите внимание на способ проверки значения, возвращаемого функцией readdir() в приведенном ниже примере. В этом примере осуществляется проверка значения на идентичность (выражения идентичны, когда они равны и являются значениями одного типа - за более подробной информацией обратитесь к главе Операторы сравнения) значению FALSE, поскольку в ином случае, любой элемент каталога, чье имя может быть выражено как FALSE, остановит цикл (например, элемент с именем "0").

Пример 1. Вывести список всех файлов в каталоге

<?php // Обратите внимание, что оператор !== не существовал до версии 4.0.0-RC2 if ($handle = opendir('/path/to/files')) { echo "Дескриптор каталога: $handle\n"; echo "Файлы:\n"; /* Именно этот способ чтения элементов каталога является правильным. */ while (false !== ($file = readdir($handle))) { echo "$file\n"; } /* Этот способ НЕВЕРЕН. */ while ($file = readdir($handle)) { echo "$file\n"; } closedir($handle); } ?>

Обратите внимание, что функция readdir() также возвращает элементы с именами . и ... Если вы не хотите получать эти значения, просто отбрасывайте их:
Пример 2. Получить список файлов в текущем каталоге и отбросить элементы с именами . и ..

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

См.также описания функций is_dir() и glob().

add a note User Contributed Notes
readdir

kermodebear at gmail dot com
31-Oct-2007 11:37


Several people here have been writing code snippets that will get a list of files with a certain extension. There is a much easier way to do this: use glob.



<?php

$a_fileList = glob('/path/to/directory/*.jpg');



foreach ($a_fileList as $file) {

   ...

}

?>



http://www.php.net/glob/

adrong spATam dealslab.com
24-Oct-2007 09:10


Passing $arFiles by reference, the getFiles function will return all jpeg, gif, and png images in a given directory and its subdirectories in a two dimensional array.



<?php

    $startPath='.';

    getFiles($startPath, &$arFiles);

    sort($arFiles); //produces desired result in PHP v4.4.4; other versions may not.



    //$arFiles[INDEX][0] the full directory in which the file is found

    //$arFiles[INDEX][1] the filename.

    //path and filename = $arFiles[INDEX][0].'/'.$arFiles[INDEX][1]



    foreach($arFiles as $val)

        //the line below will display the picture.

        echo '<img src="'.str_replace('.', '', $val[0]).'/'.urlencode($val[1]).'"><br>';

        //the commented line below will show the path to the picture.

        //echo $val[0].'/'.urlencode($val[1]).'<br>';



        //I use another PHP script to resize pictures to a common size on the fly,

        //then use a more complicated version of this script to place resized images into an HTML table

        //echo '<img src=resize.php?pic="'.str_replace('.', '', $val[0]).'/'.urlencode($val[1]).'"><br>';



    function getFiles($dir, $arFiles)

     {

        $imgFiles=opendir($dir);



        while($aFile=readdir($imgFiles) )

            if(is_dir($dir.'/'.$aFile) && ereg('[^\.]', $aFile))

                getFiles($dir.'/'.$aFile, &$arFiles);

            else if(eregi('.*\.jpg|.*\.jpeg|.*\.gif|.*\.png', $aFile))

                $arFiles[]=array($dir, $aFile);

     }

?>

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

(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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