[SOLVED] PHP: Traversing directories

[x1a4]

Hi,

How do I traverse directories using PHP4? I need to specify a directory and add all it's subdirectories (and their subdirectories etc) to an array, but have no idea how. I know next to nothing about PHP. Please help.

Thank you.

[KCPokes]

Many different ways to do this, like anything else. To make it simple, I'd use the glob() function:



foreach(glob('startDirectory/*.jpg') as $myFilename)
{
echo 'Filename: ' . $myFilename . '<br />';
}


In this case it would start in "startDirectory" and pull back everything, recursively, that is a *.jpg file. There are options you can use to make the glob function more useful, such as providing multiple file types to match. Search for glob() for more info.

[x1a4]

Thanks for your reply but that's not what I'm looking for (my fault, I wasn't specific enough). I need only the directories themselves and not their files.

For example:

assuming the following directory tree:

mydir1/
-- sub1/
-- sub2/
mydir2/
-- sub1/
mydir3/
-- sub1/
---- sub1/
---- sub2/
-- sub2/
mydir4/
mydir5/

I want PHP to populate an array with something like this:

myarray[0]=mydir1
myarray[1]=mydir1/sub1
myarray[2]=mydir1/sub2
myarray[3]=mydir2
myarray[4]=mydir2/sub1
myarray[5]=mydir3/
myarray[6]=mydir3/sub1
myarray[7]=mydir3/sub1/sub1
myarray[8]=mydir3/sub1/sub2
myarray[9]=mydir3/sub2
myarray[10]=mydir4
myarray[11]=mydir5

Would the following do the trick?


foreach(glob('mydir1/') as $myarray) {
...
}

[aks44]

See is_dir (http://fr2.php.net/manual/en/function.is-dir.php), and:
- scandir (http://fr2.php.net/manual/en/function.scandir.php) if you're using PHP5
- opendir (http://fr2.php.net/manual/en/function.opendir.php), readdir (http://fr2.php.net/manual/en/function.readdir.php), closedir (http://fr2.php.net/manual/en/function.closedir.php) if you're using PHP4

In both cases iterate on the contents of the directory, check with is_dir and don't forget to take . and .. into account.

[KCPokes]

I'm just doing this in my head, as I'm at work and really no place to try it out...



foreach(glob('startDirectory/*', GLOB_ONLYDIR) as $myFilename)
{
echo 'Filename: ' . $myFilename . '<br />';
}


Try that.

[x1a4]

Will this do the trick?



$startdir=$_SERVER[DOCUMENT_ROOT]."/mydir1/";
$i=0;

if($handle=opendir($startdir)) {
while(($file=readdir($handle))!==false) {
if(is_dir($file) && ($file!=".") && ($file!="..")) {
$dirs=array($i=>$file);
$i++;
}
}
closedir($handle);
}

[x1a4]

I'm just doing this in my head, as I'm at work and really no place to try it out...



foreach(glob('startDirectory/*', GLOB_ONLYDIR) as $myFilename)
{
echo 'Filename: ' . $myFilename . '<br />';
}


Try that.

It only gives me directories in startDirectory/ but not their subdirectories.

[KCPokes]

Just tested and this works, including a trailing slash for the directories. You can remove the slash if you don't want it.



<?php

foreach(glob('/export/home/*',GLOB_ONLYDIR | GLOB_MARK) as $myFilename)
{
echo "Directory: ".$myFilename."\n";
}
?>


Goes back to there being multiple ways of doing this.

[KCPokes]

It only gives me directories in startDirectory/ but not their subdirectories.

Ahh, you are correct. Nevermind then....where I was testing didn't go deep enough.

[KCPokes]

Threw it together real quick, making it a function that you'd call from another script, but this works:



<?php

recurse('/tools/www');

function recurse($path)
{
foreach(glob($path."/*",GLOB_ONLYDIR) as $myDirectory)
{
echo "Directory :".$myDirectory."\n";
recurse($myDirectory);
}
}
?>


Watch your trailing slash in the directory you pass, as it is not needed.

[aks44]

$startdir=$_SERVER[DOCUMENT_ROOT]."/mydir1/";
$dirs=array();
$i=0;

if($handle=opendir($startdir)) {
while(($file=readdir($handle))!==false) {
if(is_dir($file) && ($file!=".") && ($file!="..")) {
$dirs[$i]=$file;
}
$i++;
}
closedir($handle);
}

Your code will work for one directory level. If you want to achieve what you stated before, better wrap it inside a function, and make it recursive. From the top of my head:


function scan_dir_tree($basedir, $appenddir = '', $dirs = array())
{
if (($handle = opendir($basedir)) !== false)
{
while (($file = readdir($handle)) !== false)
{
if(is_dir($basedir.'/'.$appenddir.$file) && ($file != '.') && ($file != '..'))
{
$dirs[] = $appenddir.$file;
$dirs = scan_dir_tree($basedir, $appenddir.$file.'/', $dirs);
}
}
closedir($handle);
}
return $dirs;
}

$dirs = scan_dir_tree($_SERVER[DOCUMENT_ROOT].'/mydir1');


I've not tested it but it should work (more or less) as expected.

NOTE: if you don't provide the trailing / in the $basedir argument, the '/' is needed in the is_dir line. However if you do provide the / in the $basedir argument then remove it from the is_dir line.


Oh well, I just saw the glob documentation, it indeed looks way easier to use. Anyway you can still merge both my example and KCPokes' one so that you have a recursive glob that actually returns an array... ;)

[x1a4]

Thank you both. Here's how I got it to work:


function recurse($path,$dirs=array()) {
foreach(glob($path."/*",GLOB_ONLYDIR) as $d) {
$GLOBALS['dirs'][]=$d;
recurse($d,$dirs);
}
}

$dirs=array();
recurse($_SERVER[DOCUMENT_ROOT]."/path");
// now I have a $dirs array containing all the directories in $path