Recursion through a directory tree in PHP - php

Question

I have a set of folders that has a depth of at least 4 or 5 levels. I'm looking to recurse through the directory tree as deep as it goes, and iterate over every file. I've gotten the code to go down into the first sets of subdirectories, but no deeper, and I'm not sure why. Any ideas?
$count = 0;
$dir = "/Applications/MAMP/htdocs/site.com";
function recurseDirs($main, $count){
$dir = "/Applications/MAMP/htdocs/site.com";
$dirHandle = opendir($main);
echo "here";
while($file = readdir($dirHandle)){
if(is_dir($file) && $file != '.' && $file != '..'){
echo "isdir";
recurseDirs($file);
}
else{
$count++;
echo "$count: filename: $file in $dir/$main \n<br />";
}
}
}
recurseDirs($dir, $count);

Answer 1

Check out the new RecursiveDirectoryIterator.
It's still far from perfect as you can't order the search results and other things, but to simply get a list of files, it's fine.
There are simple examples to get you started in the manual like this one:
<?php
$path = realpath('/etc');
$objects = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($path),
RecursiveIteratorIterator::SELF_FIRST);
foreach($objects as $name => $object){
echo "$name\n";
}
?>

Answer 2

There is an error in the call
recurseDirs($file);
and in
is_dir($file)
you have to give the full path:
recurseDirs($main . '/' .$file, $count);
and
is_dir($main . '/' .$file)
However, like other anwerers, I suggest to use RecursiveDirectoryIteretor.

Answer 3

The call to is_dir and recurseDirs is not fully correct. Also your counting didn't work correctly. This works for me:
$dir = "/usr/";
function recurseDirs($main, $count=0){
$dirHandle = opendir($main);
while($file = readdir($dirHandle)){
if(is_dir($main.$file."/") && $file != '.' && $file != '..'){
echo "Directory {$file}: <br />";
$count = recurseDirs($main.$file."/",$count); // Correct call and fixed counting
}
else{
$count++;
echo "$count: filename: $file in $main \n<br />";
}
}
return $count;
}
$number_of_files = recurseDirs($dir);
Notice the changed calls to the function above and the new return value of the function.

Answer 4

So yeah: Today I was being lazy and Googled for a cookie cutter solution to a recursive directory listing and came across this. As I ended up writing my own function (as to why I even spent the time to Google for this is beyond me - I always seem to feel the need to re-invent the wheel for no suitable reason) I felt inclined to share my take on this.
While there are opinions for and against the use of RecursiveDirectoryIterator, I'll simply post my take on a simple recursive directory function and avoid the politics of chiming in on RecursiveDirectoryIterator.
Here it is:
function recursiveDirectoryList( $root )
{
/*
* this next conditional isn't required for the code to function, but I
* did not want double directory separators in the resulting array values
* if a trailing directory separator was provided in the root path;
* this seemed an efficient manner to remedy said problem easily...
*/
if( substr( $root, -1 ) === DIRECTORY_SEPARATOR )
{
$root = substr( $root, 0, strlen( $root ) - 1 );
}
if( ! is_dir( $root ) ) return array();
$files = array();
$dir_handle = opendir( $root );
while( ( $entry = readdir( $dir_handle ) ) !== false )
{
if( $entry === '.' || $entry === '..' ) continue;
if( is_dir( $root . DIRECTORY_SEPARATOR . $entry ) )
{
$sub_files = recursiveDirectoryList(
$root .
DIRECTORY_SEPARATOR .
$entry .
DIRECTORY_SEPARATOR
);
$files = array_merge( $files, $sub_files );
}
else
{
$files[] = $root . DIRECTORY_SEPARATOR . $entry;
}
}
return (array) $files;
}
With this function, the answer as to obtaining a file count is simple:
$dirpath = '/your/directory/path/goes/here/';
$files = recursiveDirectoryList( $dirpath );
$number_of_files = sizeof( $files );
But, if you don't want the overhead of an array of the respective file paths - or simply don't need it - there is no need to pass a count to the recursive function as was recommended.
One could simple amend my original function to perform the counting as such:
function recursiveDirectoryListC( $root )
{
$count = 0;
if( ! is_dir( $root ) ) return (int) $count;
$dir_handle = opendir( $root );
while( ( $entry = readdir( $dir_handle ) ) !== false )
{
if( $entry === '.' || $entry === '..' ) continue;
if( is_dir( $root . DIRECTORY_SEPARATOR . $entry ) )
{
$count += recursiveDirectoryListC(
$root .
DIRECTORY_SEPARATOR .
$entry .
DIRECTORY_SEPARATOR
);
}
else
{
$count++;
}
}
return (int) $count;
}
In both of these functions the opendir() function should really be wrapped in a conditional in the event that the directory is not readable or another error occurs. Make sure to do so correctly:
if( ( $dir_handle = opendir( $dir ) ) !== false )
{
/* perform directory read logic */
}
else
{
/* do something on failure */
}
Hope this helps someone...