How to remove repeated characters from string in php

How to delete repeated characters in a string in PHP. An example of using the PHP regular expression function preg_replace to quickly remove repeated characters in a string.

In PHP, array functions are generally used to remove repeated characters in strings, but they are not suitable for processing large text. You can consider using PHP regular expressions and use PHP's regular function preg_replace to clear it. example:

Output result: Result Text: one, two three, two