Regex Tester & Validator

Matches the literal character 's' in a string. With the 'm' flag, the start/end anchors apply per line, but since there are no anchors, its main effect is unchanged; the 's' flag allows '.' to match newlines, but no dot is present; the 'u' flag enables full Unicode matching. This pattern is useful for simple case-sensitive searches for the lowercase letter 's' in text.