PHP script to print all file in directory and sub-directories recursively

list_all_file.php

<?php

// Origianlly : http://php.net/manual/en/function.scandir.php#110570
function printAllFile($dir) {  
   $result = array(); 

   $cdir = scandir($dir); 
   foreach ($cdir as $key => $value) 
   { 
      if (!in_array($value,array(".",".."))) 
      { 
         if (is_dir($dir . DIRECTORY_SEPARATOR . $value)) 
         { 
            $result[$value] = printAllFile($dir . DIRECTORY_SEPARATOR . $value); 
         } 
         else 
         { 
            print($dir . DIRECTORY_SEPARATOR . $value);
            echo PHP_EOL;
         } 
      } 
   } 
   
   return ($result);
}

printAllFile('.');