Is it allowed for PHP to write to a text file?

Yes, it is allowed for PHP to write to a text file. To write to a text file in PHP, you can use the `file_put_contents()` function. This function takes the file path as the first parameter and the content to write as the second parameter. Make sure the file has the appropriate write permissions for the PHP script to be able to write to it.

$file = 'example.txt';
$content = 'Hello, this is some text to write to the file.';
file_put_contents($file, $content);