How can PHP developers ensure that text files are saved in the correct character encoding, such as ANSI, to prevent encoding discrepancies in database entries?

To ensure that text files are saved in the correct character encoding, such as ANSI, PHP developers can specify the encoding when opening the file for writing. This can be done by using the `fopen()` function with the mode parameter set to include the encoding, such as 'w' for writing and 't' for text mode. By explicitly setting the encoding, developers can prevent encoding discrepancies in database entries.

$file = fopen('example.txt', 'wt');
fwrite($file, 'Hello, world!');
fclose($file);