CI_DB_driver::compile_binds PHP Method

    public function compile_binds($sql, $binds)
    {
        if (empty($binds) or empty($this->bind_marker) or strpos($sql, $this->bind_marker) === FALSE) {
            return $sql;
        } elseif (!is_array($binds)) {
            $binds = array($binds);
            $bind_count = 1;
        } else {
            // Make sure we're using numeric keys
            $binds = array_values($binds);
            $bind_count = count($binds);
        }
        // We'll need the marker length later
        $ml = strlen($this->bind_marker);
        // Make sure not to replace a chunk inside a string that happens to match the bind marker
        if ($c = preg_match_all("/'[^']*'/i", $sql, $matches)) {
            $c = preg_match_all('/' . preg_quote($this->bind_marker, '/') . '/i', str_replace($matches[0], str_replace($this->bind_marker, str_repeat(' ', $ml), $matches[0]), $sql, $c), $matches, PREG_OFFSET_CAPTURE);
            // Bind values' count must match the count of markers in the query
            if ($bind_count !== $c) {
                return $sql;
            }
        } elseif (($c = preg_match_all('/' . preg_quote($this->bind_marker, '/') . '/i', $sql, $matches, PREG_OFFSET_CAPTURE)) !== $bind_count) {
            return $sql;
        }
        do {
            $c--;
            $escaped_value = $this->escape($binds[$c]);
            if (is_array($escaped_value)) {
                $escaped_value = '(' . implode(',', $escaped_value) . ')';
            }
            $sql = substr_replace($sql, $escaped_value, $matches[0][$c][1], $ml);
        } while ($c !== 0);
        return $sql;
    }