Strip whitespace (or other characters) from the margins (beginning and end) of a string in PHP 4+:

Strip whitespace (or other characters) from the margins (beginning and end) of a string in PHP 4+:
* https://www.php.net/manual/en/function.trim.php

trim(string $string, string $characters = " \n\r\t\v\x00"): string
trim(' 1 2  ') // => '1 2'