The PHP directory manipulation function retrieves the types of directories and files

 
<?php 
$dir = "./"; 

// Open a known directory, and proceed to read its contents 
if (is_dir($dir)) 
{ 
if ($dh = opendir($dir)) { 
while (($file = readdir($dh)) !== false) { 
echo "filename: $file : filetype: " . filetype($dir . $file) . "n"."<br />"; 
} 
closedir($dh); 
} 
} 
?> 

filename: . : filetype: dir 
filename: .. : filetype: dir 
filename: cms : filetype: dir 
filename: index.php : filetype: file 
filename: index.php.bak : filetype: file 
filename: mvc : filetype: dir 
filename: shop : filetype: dir 
filename: shop.rar : filetype: file 
filename: xampp : filetype: dir