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- 06.01.2017
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mysqli.php
001 <?php
002 /**
003 *
004 * This file is part of the phpBB Forum Software package.
005 *
006 * @copyright (c) phpBB Limited <https://www.phpbb.com>
007 * @license GNU General Public License, version 2 (GPL-2.0)
008 *
009 * For full copyright and license information, please see
010 * the docs/CREDITS.txt file.
011 *
012 */
013
014 namespace phpbb\db\driver;
015
016 /**
017 * MySQLi Database Abstraction Layer
018 * mysqli-extension has to be compiled with:
019 * MySQL 4.1+ or MySQL 5.0+
020 */
021 class mysqli extends \phpbb\db\driver\mysql_base
022 {
023 var $multi_insert = true;
024 var $connect_error = '';
025
026 /**
027 * {@inheritDoc}
028 */
029 function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)
030 {
031 if (!function_exists('mysqli_connect'))
032 {
033 $this->connect_error = 'mysqli_connect function does not exist, is mysqli extension installed?';
034 return $this->sql_error('');
035 }
036
037 $this->persistency = $persistency;
038 $this->user = $sqluser;
039
040 // If persistent connection, set dbhost to localhost when empty and prepend it with 'p:' prefix
041 $this->server = ($this->persistency) ? 'p:' . (($sqlserver) ? $sqlserver : 'localhost') : $sqlserver;
042
043 $this->dbname = $database;
044 $port = (!$port) ? null : $port;
045
046 // If port is set and it is not numeric, most likely mysqli socket is set.
047 // Try to map it to the $socket parameter.
048 $socket = null;
049 if ($port)
050 {
051 if (is_numeric($port))
052 {
053 $port = (int) $port;
054 }
055 else
056 {
057 $socket = $port;
058 $port = null;
059 }
060 }
061
062 $this->db_connect_id = mysqli_init();
063
064 if (!@mysqli_real_connect($this->db_connect_id, $this->server, $this->user, $sqlpassword, $this->dbname, $port, $socket, MYSQLI_CLIENT_FOUND_ROWS))
065 {
066 $this->db_connect_id = '';
067 }
068
069 if ($this->db_connect_id && $this->dbname != '')
070 {
071 @mysqli_query($this->db_connect_id, "SET NAMES 'utf8'");
072
073 // enforce strict mode on databases that support it
074 if (version_compare($this->sql_server_info(true), '5.0.2', '>='))
075 {
076 $result = @mysqli_query($this->db_connect_id, 'SELECT @@session.sql_mode AS sql_mode');
077 if ($result)
078 {
079 $row = mysqli_fetch_assoc($result);
080 mysqli_free_result($result);
081
082 $modes = array_map('trim', explode(',', $row['sql_mode']));
083 }
084 else
085 {
086 $modes = array();
087 }
088
089 // TRADITIONAL includes STRICT_ALL_TABLES and STRICT_TRANS_TABLES
090 if (!in_array('TRADITIONAL', $modes))
091 {
092 if (!in_array('STRICT_ALL_TABLES', $modes))
093 {
094 $modes[] = 'STRICT_ALL_TABLES';
095 }
096
097 if (!in_array('STRICT_TRANS_TABLES', $modes))
098 {
099 $modes[] = 'STRICT_TRANS_TABLES';
100 }
101 }
102
103 $mode = implode(',', $modes);
104 @mysqli_query($this->db_connect_id, "SET SESSION sql_mode='{$mode}'");
105 }
106 return $this->db_connect_id;
107 }
108
109 return $this->sql_error('');
110 }
111
112 /**
113 * {@inheritDoc}
114 */
115 function sql_server_info($raw = false, $use_cache = true)
116 {
117 global $cache;
118
119 if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('mysqli_version')) === false)
120 {
121 $result = @mysqli_query($this->db_connect_id, 'SELECT VERSION() AS version');
122 if ($result)
123 {
124 $row = mysqli_fetch_assoc($result);
125 mysqli_free_result($result);
126
127 $this->sql_server_version = $row['version'];
128
129 if (!empty($cache) && $use_cache)
130 {
131 $cache->put('mysqli_version', $this->sql_server_version);
132 }
133 }
134 }
135
136 return ($raw) ? $this->sql_server_version : 'MySQL(i) ' . $this->sql_server_version;
137 }
138
139 /**
140 * SQL Transaction
141 * @access private
142 */
143 function _sql_transaction($status = 'begin')
144 {
145 switch ($status)
146 {
147 case 'begin':
148 return @mysqli_autocommit($this->db_connect_id, false);
149 break;
150
151 case 'commit':
152 $result = @mysqli_commit($this->db_connect_id);
153 @mysqli_autocommit($this->db_connect_id, true);
154 return $result;
155 break;
156
157 case 'rollback':
158 $result = @mysqli_rollback($this->db_connect_id);
159 @mysqli_autocommit($this->db_connect_id, true);
160 return $result;
161 break;
162 }
163
164 return true;
165 }
166
167 /**
168 * {@inheritDoc}
169 */
170 function sql_query($query = '', $cache_ttl = 0)
171 {
172 if ($query != '')
173 {
174 global $cache;
175
176 // EXPLAIN only in extra debug mode
177 if (defined('DEBUG'))
178 {
179 $this->sql_report('start', $query);
180 }
181 else if (defined('PHPBB_DISPLAY_LOAD_TIME'))
182 {
183 $this->curtime = microtime(true);
184 }
185
186 $this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false;
187 $this->sql_add_num_queries($this->query_result);
188
189 if ($this->query_result === false)
190 {
191 if (($this->query_result = @mysqli_query($this->db_connect_id, $query)) === false)
192 {
193 $this->sql_error($query);
194 }
195
196 if (defined('DEBUG'))
197 {
198 $this->sql_report('stop', $query);
199 }
200 else if (defined('PHPBB_DISPLAY_LOAD_TIME'))
201 {
202 $this->sql_time += microtime(true) - $this->curtime;
203 }
204
205 if (!$this->query_result)
206 {
207 return false;
208 }
209
210 if ($cache && $cache_ttl)
211 {
212 $this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
213 }
214 }
215 else if (defined('DEBUG'))
216 {
217 $this->sql_report('fromcache', $query);
218 }
219 }
220 else
221 {
222 return false;
223 }
224
225 return $this->query_result;
226 }
227
228 /**
229 * {@inheritDoc}
230 */
231 function sql_affectedrows()
232 {
233 return ($this->db_connect_id) ? @mysqli_affected_rows($this->db_connect_id) : false;
234 }
235
236 /**
237 * {@inheritDoc}
238 */
239 function sql_fetchrow($query_id = false)
240 {
241 global $cache;
242
243 if ($query_id === false)
244 {
245 $query_id = $this->query_result;
246 }
247
248 if ($cache && !is_object($query_id) && $cache->sql_exists($query_id))
249 {
250 return $cache->sql_fetchrow($query_id);
251 }
252
253 if ($query_id)
254 {
255 $result = mysqli_fetch_assoc($query_id);
256 return $result !== null ? $result : false;
257 }
258
259 return false;
260 }
261
262 /**
263 * {@inheritDoc}
264 */
265 function sql_rowseek($rownum, &$query_id)
266 {
267 global $cache;
268
269 if ($query_id === false)
270 {
271 $query_id = $this->query_result;
272 }
273
274 if ($cache && !is_object($query_id) && $cache->sql_exists($query_id))
275 {
276 return $cache->sql_rowseek($rownum, $query_id);
277 }
278
279 return ($query_id) ? @mysqli_data_seek($query_id, $rownum) : false;
280 }
281
282 /**
283 * {@inheritDoc}
284 */
285 function sql_nextid()
286 {
287 return ($this->db_connect_id) ? @mysqli_insert_id($this->db_connect_id) : false;
288 }
289
290 /**
291 * {@inheritDoc}
292 */
293 function sql_freeresult($query_id = false)
294 {
295 global $cache;
296
297 if ($query_id === false)
298 {
299 $query_id = $this->query_result;
300 }
301
302 if ($cache && !is_object($query_id) && $cache->sql_exists($query_id))
303 {
304 return $cache->sql_freeresult($query_id);
305 }
306
307 if (!$query_id)
308 {
309 return false;
310 }
311
312 if ($query_id === true)
313 {
314 return true;
315 }
316
317 return mysqli_free_result($query_id);
318 }
319
320 /**
321 * {@inheritDoc}
322 */
323 function sql_escape($msg)
324 {
325 return @mysqli_real_escape_string($this->db_connect_id, $msg);
326 }
327
328 /**
329 * return sql error array
330 * @access private
331 */
332 function _sql_error()
333 {
334 if ($this->db_connect_id)
335 {
336 $error = array(
337 'message' => @mysqli_error($this->db_connect_id),
338 'code' => @mysqli_errno($this->db_connect_id)
339 );
340 }
341 else if (function_exists('mysqli_connect_error'))
342 {
343 $error = array(
344 'message' => @mysqli_connect_error(),
345 'code' => @mysqli_connect_errno(),
346 );
347 }
348 else
349 {
350 $error = array(
351 'message' => $this->connect_error,
352 'code' => '',
353 );
354 }
355
356 return $error;
357 }
358
359 /**
360 * Close sql connection
361 * @access private
362 */
363 function _sql_close()
364 {
365 return @mysqli_close($this->db_connect_id);
366 }
367
368 /**
369 * Build db-specific report
370 * @access private
371 */
372 function _sql_report($mode, $query = '')
373 {
374 static $test_prof;
375
376 // current detection method, might just switch to see the existance of INFORMATION_SCHEMA.PROFILING
377 if ($test_prof === null)
378 {
379 $test_prof = false;
380 if (strpos(mysqli_get_server_info($this->db_connect_id), 'community') !== false)
381 {
382 $ver = mysqli_get_server_version($this->db_connect_id);
383 if ($ver >= 50037 && $ver < 50100)
384 {
385 $test_prof = true;
386 }
387 }
388 }
389
390 switch ($mode)
391 {
392 case 'start':
393
394 $explain_query = $query;
395 if (preg_match('/UPDATE ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m))
396 {
397 $explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2];
398 }
399 else if (preg_match('/DELETE FROM ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m))
400 {
401 $explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2];
402 }
403
404 if (preg_match('/^SELECT/', $explain_query))
405 {
406 $html_table = false;
407
408 // begin profiling
409 if ($test_prof)
410 {
411 @mysqli_query($this->db_connect_id, 'SET profiling = 1;');
412 }
413
414 if ($result = @mysqli_query($this->db_connect_id, "EXPLAIN $explain_query"))
415 {
416 while ($row = mysqli_fetch_assoc($result))
417 {
418 $html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
419 }
420 mysqli_free_result($result);
421 }
422
423 if ($html_table)
424 {
425 $this->html_hold .= '</table>';
426 }
427
428 if ($test_prof)
429 {
430 $html_table = false;
431
432 // get the last profile
433 if ($result = @mysqli_query($this->db_connect_id, 'SHOW PROFILE ALL;'))
434 {
435 $this->html_hold .= '<br />';
436 while ($row = mysqli_fetch_assoc($result))
437 {
438 // make <unknown> HTML safe
439 if (!empty($row['Source_function']))
440 {
441 $row['Source_function'] = str_replace(array('<', '>'), array('<', '>'), $row['Source_function']);
442 }
443
444 // remove unsupported features
445 foreach ($row as $key => $val)
446 {
447 if ($val === null)
448 {
449 unset($row[$key]);
450 }
451 }
452 $html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
453 }
454 mysqli_free_result($result);
455 }
456
457 if ($html_table)
458 {
459 $this->html_hold .= '</table>';
460 }
461
462 @mysqli_query($this->db_connect_id, 'SET profiling = 0;');
463 }
464 }
465
466 break;
467
468 case 'fromcache':
469 $endtime = explode(' ', microtime());
470 $endtime = $endtime[0] + $endtime[1];
471
472 $result = @mysqli_query($this->db_connect_id, $query);
473 if ($result)
474 {
475 while ($void = mysqli_fetch_assoc($result))
476 {
477 // Take the time spent on parsing rows into account
478 }
479 mysqli_free_result($result);
480 }
481
482 $splittime = explode(' ', microtime());
483 $splittime = $splittime[0] + $splittime[1];
484
485 $this->sql_report('record_fromcache', $query, $endtime, $splittime);
486
487 break;
488 }
489 }
490 }
491