I need to cut short words (up to 2 characters), but leave the numbers. I do this:

/\b([а-я]{0,2})\b/u az /\b([а-я]{0,2})\b/u + preg_replace.

How do I set this regular season exceptions?

Type kg, cm, etc.

    1 answer 1

    Use negative lookahead for example:

     /\b(?!кг|см)([а-яё]{0,2})\b/ui

    Test https://regex101.com/r/IvpGWQ/1

    PS Capture group can be removed https://regex101.com/r/IvpGWQ/2