framework/db/SqlTokenizer.php
protected function indexAfter($string, $offset = null)
    {
        if ($offset === null) {
            $offset = $this->offset;
        }
        if ($offset + mb_strlen($string, 'UTF-8') > $this->length) {
            return $this->length;
        }

        $afterIndexOf = mb_strpos($this->sql, $string, $offset, 'UTF-8');
        if ($afterIndexOf === false) {
            $afterIndexOf = $this->length;
        } else {
            $afterIndexOf += mb_strlen($string, 'UTF-8');
        }

        return $afterIndexOf;
    }
protected function indexAfter($string, $offset = null)
    {
        if ($offset === null) {
            $offset = $this->offset;
        }
        if ($offset + mb_strlen($string, 'UTF-8') > $this->length) {
            return $this->length;
        }

        $afterIndexOf = mb_strpos($this->sql, $string, $offset, 'UTF-8');
        if ($afterIndexOf === false) {
            $afterIndexOf = $this->length;
        } else {
            $afterIndexOf += mb_strlen($string, 'UTF-8');
        }

        return $afterIndexOf;
    }
Returns an index after the given string in the SQL code starting with the specified offset.
@param string $string string to be found.
@param int|null $offset SQL code offset, defaults to current if `null` is passed.
@return int index after the given string or end of string index.