What are the differences between using preg_replace() and ereg_replace() in PHP for text manipulation?

The main difference between preg_replace() and ereg_replace() in PHP is that preg_replace() uses Perl-compatible regular expressions while ereg_replace() uses POSIX extended regular expressions. Since ereg_replace() is deprecated as of PHP 5.3.0 and removed in PHP 7.0.0, it is recommended to use preg_replace() for text manipulation tasks.

// Using preg_replace() for text manipulation
$string = "Hello, World!";
$new_string = preg_replace("/Hello/", "Hi", $string);
echo $new_string;