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1 <?php
2 /***************************************************************************
3  *                              mssql-odbc.php
4  *                            -------------------
5  *   begin                : Saturday, Feb 13, 2001
6  *   copyright            : (C) 2001 The phpBB Group
7  *   email                : support@phpbb.com
8  *
9  *   $Id: mssql-odbc.php,v 1.7 2002/03/20 17:48:30 psotfx Exp $
10  *
11  ***************************************************************************/
13 /***************************************************************************
14  *
15  *   This program is free software; you can redistribute it and/or modify
16  *   it under the terms of the GNU General Public License as published by
17  *   the Free Software Foundation; either version 2 of the License, or
18  *   (at your option) any later version.
19  *
20  ***************************************************************************/
22 if(!defined("SQL_LAYER"))
23 {
25 define("SQL_LAYER","mssql-odbc");
27 class sql_db
28 {
30         var $db_connect_id;
31         var $result;
33         var $next_id;
35         var $num_rows = array();
36         var $current_row = array();
37         var $field_names = array();
38         var $field_types = array();
39         var $result_rowset = array();
41         var $num_queries = 0;
43         //
44         // Constructor
45         //
46         function sql_db($sqlserver, $sqluser, $sqlpassword, $database, $persistency = true)
47         {
48                 $this->persistency = $persistency;
49                 $this->server = $sqlserver;
50                 $this->user = $sqluser;
51                 $this->password = $sqlpassword;
52                 $this->dbname = $database;
54                 $this->db_connect_id = ($this->persistency) ? odbc_pconnect($this->server, $this->user, $this->password) : odbc_connect($this->server, $this->user, $this->password);
56                 return ( $this->db_connect_id ) ? $this->db_connect_id : false;
57         }
58         //
59         // Other base methods
60         //
61         function sql_close()
62         {
63                 if($this->db_connect_id)
64                 {
65                         if( $this->in_transaction )
66                         {
67                                 @odbc_commit($this->db_connect_id);
68                         }
70                         if( count($this->result_rowset) )
71                         {
72                                 unset($this->result_rowset);
73                                 unset($this->field_names);
74                                 unset($this->field_types);
75                                 unset($this->num_rows);
76                                 unset($this->current_row);
77                         }
79                         return @odbc_close($this->db_connect_id);
80                 }
81                 else
82                 {
83                         return false;
84                 }
85         }
87         //
88         // Query method
89         //
90         function sql_query($query = "", $transaction = FALSE)
91         {
92                 if( $query != "" )
93                 {
94                         $this->num_queries++;
96                         if( $transaction == BEGIN_TRANSACTION && !$this->in_transaction )
97                         {
98                                 if( !odbc_autocommit($this->db_connect_id, false) )
99                                 {
100                                         return false;
101                                 }
102                                 $this->in_transaction = TRUE;
103                         }
105                         if( preg_match("/^SELECT(.*?)(LIMIT ([0-9]+)[, ]*([0-9]+)*)?$/s", $query, $limits) )
106                         {
107                                 $query = $limits[1];
109                                 if( !empty($limits[2]) )
110                                 {
111                                         $row_offset = ( $limits[4] ) ? $limits[3] : "";
112                                         $num_rows = ( $limits[4] ) ? $limits[4] : $limits[3];
114                                         $query = "TOP " . ( $row_offset + $num_rows ) . $query;
115                                 }
117                                 $this->result = odbc_exec($this->db_connect_id, "SELECT $query"); 
119                                 if( $this->result )
120                                 {
121                                         if( empty($this->field_names[$this->result]) )
122                                         {
123                                                 for($i = 1; $i < odbc_num_fields($this->result) + 1; $i++)
124                                                 {
125                                                         $this->field_names[$this->result][] = odbc_field_name($this->result, $i);
126                                                         $this->field_types[$this->result][] = odbc_field_type($this->result, $i);
127                                                 }
128                                         }
130                                         $this->current_row[$this->result] = 0;
131                                         $this->result_rowset[$this->result] = array();
133                                         $row_outer = ( isset($row_offset) ) ? $row_offset + 1 : 1;
134                                         $row_outer_max = ( isset($num_rows) ) ? $row_offset + $num_rows + 1 : 1E9;
135                                         $row_inner = 0;
137                                         while( odbc_fetch_row($this->result, $row_outer) && $row_outer < $row_outer_max )
138                                         {
139                                                 for($j = 0; $j < count($this->field_names[$this->result]); $j++)
140                                                 {
141                                                         $this->result_rowset[$this->result][$row_inner][$this->field_names[$this->result][$j]] = stripslashes(odbc_result($this->result, $j + 1));
142                                                 }
144                                                 $row_outer++;
145                                                 $row_inner++;
146                                         }
148                                         $this->num_rows[$this->result] = count($this->result_rowset[$this->result]);    
149                                 }
151                         }
152                         else if( eregi("^INSERT ", $query) )
153                         {
154                                 $this->result = odbc_exec($this->db_connect_id, $query);
156                                 if( $this->result )
157                                 {
158                                         $result_id = odbc_exec($this->db_connect_id, "SELECT @@IDENTITY");
159                                         if( $result_id )
160                                         {
161                                                 if( odbc_fetch_row($result_id) )
162                                                 {
163                                                         $this->next_id[$this->db_connect_id] = odbc_result($result_id, 1);      
164                                                         $this->affected_rows[$this->db_connect_id] = odbc_num_rows($this->result);
165                                                 }
166                                         }
167                                 }
168                         }
169                         else
170                         {
171                                 $this->result = odbc_exec($this->db_connect_id, $query);
173                                 if( $this->result )
174                                 {
175                                         $this->affected_rows[$this->db_connect_id] = odbc_num_rows($this->result);
176                                 }
177                         }
179                         if( !$this->result )
180                         {
181                                 if( $this->in_transaction )
182                                 {
183                                         odbc_rollback($this->db_connect_id);
184                                         odbc_autocommit($this->db_connect_id, true);
185                                         $this->in_transaction = FALSE;
186                                 }
188                                 return false;
189                         }
191                         if( $transaction == END_TRANSACTION && $this->in_transaction )
192                         {
193                                 $this->in_transaction = FALSE;
195                                 if ( !odbc_commit($this->db_connect_id) )
196                                 {
197                                         odbc_rollback($this->db_connect_id);
198                                         odbc_autocommit($this->db_connect_id, true);
199                                         return false;
200                                 }
201                                 odbc_autocommit($this->db_connect_id, true);
202                         }
204                         odbc_free_result($this->result);
206                         return $this->result;
207                 }
208                 else
209                 {
210                         if( $transaction == END_TRANSACTION && $this->in_transaction )
211                         {
212                                 $this->in_transaction = FALSE;
214                                 if ( !@odbc_commit($this->db_connect_id) )
215                                 {
216                                         odbc_rollback($this->db_connect_id);
217                                         odbc_autocommit($this->db_connect_id, true);
218                                         return false;
219                                 }
220                                 odbc_autocommit($this->db_connect_id, true);
221                         }
223                         return true;
224                 }
225         }
227         //
228         // Other query methods
229         //
230         function sql_numrows($query_id = 0)
231         {
232                 if( !$query_id ) 
233                 {
234                         $query_id = $this->result;
235                 }
237                 return ( $query_id ) ? $this->num_rows[$query_id] : false;
238         }
240         function sql_numfields($query_id = 0)
241         {
242                 if( !$query_id )
243                 {
244                         $query_id = $this->result;
245                 }
247                 return ( $query_id ) ? count($this->field_names[$query_id]) : false;
248         }
250         function sql_fieldname($offset, $query_id = 0)
251         {
252                 if( !$query_id )
253                 {
254                         $query_id = $this->result;
255                 }
257                 return ( $query_id ) ? $this->field_names[$query_id][$offset] : false;
258         }
260         function sql_fieldtype($offset, $query_id = 0)
261         {
262                 if( !$query_id )
263                 {
264                         $query_id = $this->result;
265                 }
267                 return ( $query_id ) ? $this->field_types[$query_id][$offset] : false;
268         }
270         function sql_fetchrow($query_id = 0)
271         {
272                 if( !$query_id )
273                 {
274                         $query_id = $this->result;
275                 }
277                 if( $query_id )
278                 {
279                         return ( $this->num_rows[$query_id] && $this->current_row[$query_id] < $this->num_rows[$query_id] ) ? $this->result_rowset[$query_id][$this->current_row[$query_id]++] : false;
280                 }
281                 else
282                 {
283                         return false;
284                 }
285         }
287         function sql_fetchrowset($query_id = 0)
288         {
289                 if( !$query_id )
290                 {
291                         $query_id = $this->result;
292                 }
294                 if( $query_id )
295                 {
296                         return ( $this->num_rows[$query_id] ) ? $this->result_rowset[$query_id] : false;
297                 }
298                 else
299                 {
300                         return false;
301                 }
302         }
304         function sql_fetchfield($field, $row = -1, $query_id = 0)
305         {
306                 if( !$query_id )
307                 {
308                         $query_id = $this->result;
309                 }
311                 if( $query_id )
312                 {
313                         if( $row < $this->num_rows[$query_id] )
314                         {
315                                 $getrow = ( $row == -1 ) ? $this->current_row[$query_id] - 1 : $row;
317                                 return $this->result_rowset[$query_id][$getrow][$this->field_names[$query_id][$field]];
319                         }
320                         else
321                         {
322                                 return false;
323                         }
324                 }
325                 else
326                 {
327                         return false;
328                 }
329         }
331         function sql_rowseek($offset, $query_id = 0)
332         {
333                 if( !$query_id )
334                 {
335                         $query_id = $this->result;
336                 }
338                 if( $query_id )
339                 {
340                         $this->current_row[$query_id] = $offset - 1;
341                         return true;
342                 }
343                 else
344                 {
345                         return false;
346                 }
347         }
349         function sql_nextid()
350         {
351                 return ( $this->next_id[$this->db_connect_id] ) ? $this->next_id[$this->db_connect_id] : false;
352         }
354         function sql_affectedrows()
355         {
356                 return ( $this->affected_rows[$this->db_connect_id] ) ? $this->affected_rows[$this->db_connect_id] : false;
357         }
359         function sql_freeresult($query_id = 0)
360         {
361                 if( !$query_id )
362                 {
363                         $query_id = $this->result;
364                 }
366                 unset($this->num_rows[$query_id]);
367                 unset($this->current_row[$query_id]);
368                 unset($this->result_rowset[$query_id]);
369                 unset($this->field_names[$query_id]);
370                 unset($this->field_types[$query_id]);
372                 return true;
373         }
375         function sql_error()
376         {
377                 $error['code'] = odbc_error($this->db_connect_id);
378                 $error['message'] = odbc_errormsg($this->db_connect_id);
380                 return $error;
381         }
383 } // class sql_db
385 } // if ... define
387 ?>