dir

(PHP 4, PHP 5, PHP 7, PHP 8)

dir — 返回一个 Directory 类实例

说明

dir(string $directory, ?resource $context = null): Directory|false

以面向对象的方式访问目录。打开 directory 参数指定的目录。

参数

directory: 被打开的目录
context: 上下文流（context stream） resource。

返回值

返回 Directory 的实例，出现错误时返回 false。

更新日志

版本	说明
8.0.0	`context` 现在可为空（nullable）。

示例

示例 #1 dir() 示例

请特别注意下面示例中 Directory::read() 函数返回值的判断方式。我们严格测试（值相等，并且类型相同，请参考比较运算符）返回值等于 false ，因为有些情况下，目录名可能"等于" false ，导致跳出循环。

<?php
$d = dir("/etc/php5");
echo "Handle: " . $d->handle . "\n";
echo "Path: " . $d->path . "\n";
while (false !== ($entry = $d->read())) {
   echo $entry."\n";
}
$d->close();
?>

以上示例的输出类似于：

Handle: Resource id #2
Path: /etc/php5
.
..
apache
cgi
cli

注释

注意:
目录条目返回的顺序依赖于系统。

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用户贡献的备注 6 notes

down

synnus at gmail dot com ¶

3 years ago

<?php

// simple juste use FilesystemIterator 
   // and you can skip dot and duble dot
   // and use it in array
   // new FilesystemIterator( PATH , OPTIONS ) : array 

$array_file_list = new FilesystemIterator( PATH_ROOT . 'folder/', FilesystemIterator::SKIP_DOTS );

?>

down

fordiman at gmail dot com ¶

19 years ago

This one's pretty nice.  After getting frustrated for hunting down .jpg files in my massive music collection (PHP would run out of memory), I thought there should be a preg_ls function.

function preg_ls ($path=".", $rec=false, $pat="/.*/") {
    // it's going to be used repeatedly, ensure we compile it for speed.
    $pat=preg_replace("|(/.*/[^S]*)|s", "\\1S", $pat);
    //Remove trailing slashes from path
    while (substr($path,-1,1)=="/") $path=substr($path,0,-1);
    //also, make sure that $path is a directory and repair any screwups
    if (!is_dir($path)) $path=dirname($path);
    //assert either truth or falsehoold of $rec, allow no scalars to mean truth
    if ($rec!==true) $rec=false;
    //get a directory handle
    $d=dir($path);
    //initialise the output array
    $ret=Array();
    //loop, reading until there's no more to read
    while (false!==($e=$d->read())) {
        //Ignore parent- and self-links
        if (($e==".")||($e=="..")) continue;
        //If we're working recursively and it's a directory, grab and merge
        if ($rec && is_dir($path."/".$e)) {
            $ret=array_merge($ret,preg_ls($path."/".$e,$rec,$pat));
            continue;
        }
        //If it don't match, exclude it
        if (!preg_match($pat,$e)) continue;
        //In all other cases, add it to the output array
        $ret[]=$path."/".$e;
    }
    //finally, return the array
    return $ret;
}

Not bad for a mere 18 lines, don't you think?

Example use:

foreach (preg_ls("/etc/X11", true, "/.*\.conf/i") as $file) echo $file."\n";

Output: 

/etc/X11/xkb/README.config
/etc/X11/xorg.conf-vesa
/etc/X11/xorg.conf~
/etc/X11/gui.conf
/etc/X11/xorg.conf
/etc/X11/xorg.conf-fbdev

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samuel dot l at mushicrew dot com ¶

19 years ago

Note that the dir object will use the default encoding for non-unicode programs on Windows with PHP 5.x.

So, if you have a file named with characters unsupported by the current default encoding, the dir->read() method will return a wrong entry.

<?php
/*
** This script is on the same directory than a file named with
** unsupported characters for the current default encoding.
*/
$d = dir("./");
while(false !== ($e = $d->read()))
    echo $e . '<br/>';
?>

This will print a "?" for every unsupported characters, and not the right file name. So take care if you check with is_file/is_dir right after enumerating.

down

Anonymous ¶

19 years ago

Regarding samuel's comment about the dir() function not supporting Unicode properly, it's all in the encoding. The function does NOT internally change Unicode characters into question marks (?), as I was first led to believe. If you simply try to output them in UTF-8, they'll show up just right.

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synnus at gmail dot com ¶

2 years ago

<?php

/*
  New recursive PHP8 
  gen array path with  FilesystemIterator
*/

$recurcive_path = [];
rdir(path, $recurcive_path);
var_dump($recurcive_path);

function rdir(string $path, array &$recurcive_path): string
{
    if ($path != '') {
$recurcive_path[] = $path;
$array_list = iterator_to_array(new FilesystemIterator($path, FilesystemIterator::SKIP_DOTS));
        foreach ($array_list as $name) {
$pathname = $name->getpathname();
            if(is_dir($pathname) && $name->getfilename()[0] != '.'){
$path = rdir($pathname,$recurcive_path);
            }
        }
        return $path;
    }
    return '';
}

?>

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GUILLE@GARGANO ¶

14 years ago

to get a dir of http://www.example.com/directory


<?php

function remotedir($dir)

{

$dir = str_replace(" ", "%20", html_entity_decode($dir));

  if (($rh = fopen($dir, 'rb')) === FALSE) { return false; }

$i = 0;

  while (!feof($rh)) {

$archivos = fgetss($rh);

$directorio[$i++] = trim( substr($archivos,1,strpos($archivos," ",1)) );

  }

fclose($rh);

  return $directorio;

}

?>