lib/dml/sqlsrv_native_moodle_recordset.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 2 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 /**
  18  * sqlsrv specific recordset.
  19  *
  20  * @package    core_dml
  21  * @copyright  2009 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
  22  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v2 or later
  23  */
  24
  25 defined('MOODLE_INTERNAL') || die();
  26
  27 require_once(__DIR__.'/moodle_recordset.php');
  28
  29 class sqlsrv_native_moodle_recordset extends moodle_recordset {
  30
  31     protected $rsrc;
  32     protected $current;
  33
  34     public function __construct($rsrc) {
  35         $this->rsrc  = $rsrc;
  36         $this->current = $this->fetch_next();
  37     }
  38
  39     public function __destruct() {
  40         $this->close();
  41     }
  42
  43     private function fetch_next() {
  44         if ($row = sqlsrv_fetch_array($this->rsrc, SQLSRV_FETCH_ASSOC)) {
  45             unset($row['sqlsrvrownumber']);
  46             $row = array_change_key_case($row, CASE_LOWER);
  47         }
  48         return $row;
  49     }
  50
  51     public function current() {
  52         return (object)$this->current;
  53     }
  54
  55     public function key() {
  56         // return first column value as key
  57         if (!$this->current) {
  58             return false;
  59         }
  60         $key = reset($this->current);
  61         return $key;
  62     }
  63
  64     public function next() {
  65         $this->current = $this->fetch_next();
  66     }
  67
  68     public function valid() {
  69         return !empty($this->current);
  70     }
  71
  72     public function close() {
  73         if ($this->rsrc) {
  74             sqlsrv_free_stmt($this->rsrc);
  75             $this->rsrc  = null;
  76         }
  77         $this->current = null;
  78     }
  79 }