要忽略的递归副本集文件夹

Question

I'm using this function to copy parts of WordPress into a backup directory, however when I backup the plugins directory the program enters an infinite loop, is there a way to set a folder to ignore while copying the folders? from echoing out $dir I just get #resource ID x

function sisb_content_dir_copy($src, $dst) {
$dir = opendir($src);
// Make the destination directory if not exist
@mkdir($dst);

// Loop through the files in source directory
while( $file = readdir($dir) ) {
  echo $file."</br>";
    if (( $file != '.' ) && ( $file != '..' )){
        if ( is_dir($src . '/' . $file) )
        {

            // Recursively calling custom copy function
            // for sub directory
            sisb_content_dir_copy($src . '/' . $file, $dst . '/' . $file);

        }
        else {
            copy($src . '/' . $file, $dst . '/' . $file);
        }
    }
}

closedir($dir);

}

Answer 1

As far as you 're running a PHP version greater than 5.4 you can use the PHP built-in DirectoryIterator and FilterIterator classes to achieve your goal. With the Filter class you can declare which files and directories are accepted by the iterator. Beside that the built-in iterator classes are faster and don 't mess around with memory consumption. Here 'sa little example.

<?php
$directory = new RecursiveDirectoryIterator($path, FilesystemIterator::FOLLOW_SYMLINKS);
$filter = new RecursiveCallbackFilterIterator($directory, function($current, $key, $iterator) {
    // Skip hidden files and directories.
    if ($current->getFilename()[0] === '.') {
        return FALSE;
    }

    if ($current->isDir()) {
        // Only recurse into intended subdirectories
        return $current->getFilename() === 'wanted_dirname';
    } else {
       // Only consume files of interest.
       return strpos($current->getFilename(), 'wanted_filename') === 0;
    }
});

$iterator = new RecursiveIteratorIterator($filter);
$files = [];

foreach ($iterator as $info) {
   $files[] = $info->getPathname();
}

The $files array contains all the files which pass the callback filter. These files you can copy whereever you want. The RecursiveCallbackFilterIterator class is a PHP built-in class, you can use since PHP 5.4 onwards.

This example is taken from the PHP documentation for the RecursiveDirectoryIterator class. Thanks to sun, who did this six years ago.

Hope that helps. ;)

Answer 2

The accepted answer is better as long as you have access to a high enough PHP version, this works for other versions though

function sisb_content_dir_copy($src, $dst) {
//echo $src.'</br>';
$dir = opendir($src);
//echo '</br>'.$dst;
// Make the destination directory if not exist
//if (!file_exists('/srv/www/sisb/public_html/wp-content/plugins/WP-SISB/contentbackups')) {
@mkdir($dst);
//}
// Loop through the files in source directory
while( $file = readdir($dir) ) {
  echo $file."</br>";
    if (( $file != '.' ) && ( $file != '..' )){
        if ( is_dir($src . '/' . $file) && ($file !='unwanted folder'))
        {

            // Recursively calling custom copy function
            // for sub directory
            sisb_content_dir_copy($src . '/' . $file, $dst . '/' . $file);

        }
        else {
          if($file !='unwanted folder'){
            copy($src . '/' . $file, $dst . '/' . $file);
          }
        }
    }
}

closedir($dir);

}