use the following PHP code to delete all instances of these files in all directories

It is important to first identify the source of the hack and address any security vulnerabilities before simply deleting the compromised files. Deleting the files without addressing the root cause could leave your site vulnerable to further attacks.

Assuming that you have already taken steps to secure your site and have identified the wp-inda.php files as malicious, you can use the following PHP code to delete all instances of these files in all directories:

<?php
$dir_iterator = new RecursiveDirectoryIterator('/path/to/your/directory');
$iterator = new RecursiveIteratorIterator($dir_iterator, RecursiveIteratorIterator::CHILD_FIRST);

foreach ($iterator as $file) {
    if ($file->isFile() && $file->getFilename() == 'wp-inda.php') {
        unlink($file->getPathname());
    }
}
?>

Replace "/path/to/your/directory" with the actual path to the directory that contains the files you want to delete. Make sure to test this code on a development or staging environment before running it on your live site to avoid accidentally deleting any important files.

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Using * in a file path is typically used to indicate a wildcard character that represents zero or more characters in a filename or path. However, it's important to note that using * alone does not match all directories.

If you want to delete all instances of the wp-inda.php file in all directories within your website's root directory, you can use the following PHP code:

<?php
$dir_iterator = new RecursiveDirectoryIterator(__DIR__);
$iterator = new RecursiveIteratorIterator($dir_iterator, RecursiveIteratorIterator::SELF_FIRST);

foreach ($iterator as $file) {
    if ($file->isFile() && $file->getFilename() == 'wp-inda.php') {
        unlink($file->getPathname());
    }
}
?>

In this code, __DIR__ represents the root directory of your website, and the RecursiveDirectoryIterator and RecursiveIteratorIterator classes are used to recursively iterate through all directories and files in the root directory. The SELF_FIRST flag is used to process the root directory before its subdirectories.

Please be cautious when using this code, as deleting the wrong files can potentially cause data loss or break your website. It is recommended that you backup your website files and test the code on a development or staging environment before running it on your live website.