PHP code to recursively obtain files in a directory (including subdirectories)

/**
* Recursively obtain files in directories and subdirectories
* by bbs.it-home.org
*/
function readFileFromDir($dir) {
 if (!is_dir($dir)) {
 return false;
 }
 //Open the directory
 $handle = opendir($dir);
 while (($file = readdir($handle)) !== false) {
 //Exclude the current directory and the previous directory A directory
 if ($file == "." || $file == "..") {
 continue;
 }
 $file = $dir . DIRECTORY_SEPARATOR . $file;
 //If it is a file, print it out , otherwise call recursively
 if (is_file($file)) {
 print $file . '';
 } elseif (is_dir($file)) {
 readFileFromDir($file);
 }
 }
}

Calling method:

$dir = '/var/www/test';
readFileFromDir($dir);

View the php manual and find that a method scandir can also be used. This method will be used once Get all the files in a single-level directory and store them in an array. This method is not suitable when there are many files in the directory.