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<?php
2
/**
3
 * php7-mysql-shim
4
 *
5
 * @author Davey Shafik <me@daveyshafik.com>
6
 * @copyright Copyright (c) 2017 Davey Shafik
7
 * @license MIT License
8
 * @link https://github.com/dshafik/php7-mysql-shim
9
 */
10
 
11
/**
12
 * A drop-in replacement for ext/mysql in PHP 7+ using ext/mysqli instead
13
 *
14
 * This library is meant to be a _stop-gap_. It will be slower than using
15
 * the native functions directly.
16
 *
17
 * You should switch to ext/pdo_mysql or ext/mysqli, and migrate to prepared
18
 * queries (@see http://php.net/manual/en/pdo.prepared-statements.php) to
19
 * ensure you are securely interacting with your database.
20
 */
21
namespace {
22
 
23
    if (!extension_loaded('mysql')) {
24
        if (!extension_loaded('mysqli')) {
25
            trigger_error('php7-mysql-shim: ext/mysqli is required', E_USER_ERROR);
26
        }
27
 
28
        define('MYSQL_ASSOC', 1);
29
        define('MYSQL_NUM', 2);
30
        define('MYSQL_BOTH', 3);
31
        define('MYSQL_CLIENT_COMPRESS', 32);
32
        define('MYSQL_CLIENT_SSL', 2048);
33
        define('MYSQL_CLIENT_INTERACTIVE', 1024);
34
        define('MYSQL_CLIENT_IGNORE_SPACE', 256);
35
 
36
        function mysql_connect(
37
            $hostname = null,
38
            $username = null,
39
            $password = null,
40
            $new = false,
41
            $flags = 0
42
        ) {
43
            if (null === $hostname) {
44
                $hostname = ini_get('mysqli.default_host') ?: null;
45
            }
46
            if (null === $username) {
47
                $username = ini_get('mysqli.default_user') ?: null;
48
            }
49
            if (null === $password) {
50
                $password = ini_get('mysqli.default_pw') ?: null;
51
            }
52
 
53
            $hash = sha1($hostname . $username . $flags);
54
            /* persistent connections start with p: */
55
            /* don't use a cached link for those */
56
            if (!$new && $hostname[1] !== ':' && isset(\Dshafik\MySQL::$connections[$hash])) {
57
                \Dshafik\MySQL::$last_connection = \Dshafik\MySQL::$connections[$hash]['conn'];
58
                \Dshafik\MySQL::$connections[$hash]['refcount'] += 1;
59
                return \Dshafik\MySQL::$connections[$hash]['conn'];
60
            }
61
 
62
            /* A custom port can be specified by appending the hostname with :{port} e.g. hostname:3307 */
63
            if (preg_match('/^(.+):([\d]+)$/', $hostname, $port_matches) === 1 && $port_matches[1] !== "p") {
64
                $hostname = $port_matches[1];
65
                $port = (int) $port_matches[2];
66
            } else {
67
                $port = null;
68
            }
69
 
70
            /* No flags, means we can use mysqli_connect() */
71
            if ($flags === 0) {
72
                $conn = mysqli_connect($hostname, $username, $password, '', $port);
73
                if (!$conn instanceof mysqli) {
74
                    return false;
75
                }
76
                \Dshafik\MySQL::$last_connection = $conn;
77
                $conn->hash = $hash;
78
                \Dshafik\MySQL::$connections[$hash] = array('refcount' => 1, 'conn' => $conn);
79
 
80
                return $conn;
81
            }
82
 
83
            /* Flags means we need to use mysqli_real_connect() instead, and handle exceptions */
84
            try {
85
                \Dshafik\MySQL::$last_connection = $conn = mysqli_init();
86
 
87
                mysqli_real_connect(
88
                    $conn,
89
                    $hostname,
90
                    $username,
91
                    $password,
92
                    '',
93
                    $port,
94
                    '',
95
                    $flags
96
                );
97
 
98
                // @codeCoverageIgnoreStart
99
                // PHPUnit turns the warning from mysqli_real_connect into an exception, so this never runs
100
                if ($conn === false) {
101
                    return false;
102
                }
103
                // @codeCoverageIgnoreEnd
104
 
105
                $conn->hash = $hash;
106
                \Dshafik\MySQL::$connections[$hash] = array('refcount' => 1, 'conn' => $conn);
107
 
108
                return $conn;
109
            } catch (\Throwable $e) {
110
                trigger_error($e->getMessage(), E_USER_WARNING);
111
                // @codeCoverageIgnoreStart
112
                // PHPUnit turns the warning into an exception, so this never runs
113
                return false;
114
                // @codeCoverageIgnoreEnd
115
            }
116
        }
117
 
118
        function mysql_pconnect(
119
            $hostname = null,
120
            $username = null,
121
            $password = null,
122
            $flags = 0
123
        ) {
124
            $hostname = 'p:' . $hostname;
125
            return mysql_connect($hostname, $username, $password, false, $flags);
126
        }
127
 
128
        function mysql_close(\mysqli $link = null)
129
        {
130
            $isDefault = ($link === null);
131
 
132
            $link = \Dshafik\MySQL::getConnection($link, __FUNCTION__);
133
            if ($link === null) {
134
                // @codeCoverageIgnoreStart
135
                // PHPUnit Warning -> Exception
136
                return false;
137
                // @codeCoverageIgnoreEnd
138
            }
139
 
140
            if (isset(\Dshafik\MySQL::$connections[$link->hash])) {
141
                \Dshafik\MySQL::$connections[$link->hash]['refcount'] -= 1;
142
            }
143
 
144
            $return = true;
145
            if (\Dshafik\MySQL::$connections[$link->hash]['refcount'] === 0) {
146
                $return = mysqli_close($link);
147
                unset(\Dshafik\MySQL::$connections[$link->hash]);
148
            }
149
 
150
            if ($isDefault) {
151
                Dshafik\MySQL::$last_connection = null;
152
            }
153
 
154
            return $return;
155
        }
156
 
157
        function mysql_select_db($databaseName, \mysqli $link = null)
158
        {
159
            $link = \Dshafik\MySQL::getConnection($link);
160
 
161
            return mysqli_query(
162
                $link,
163
                'USE `' . mysqli_real_escape_string($link, $databaseName) . '`'
164
            ) !== false;
165
        }
166
 
167
        function mysql_query($query, \mysqli $link = null)
168
        {
169
            return mysqli_query(\Dshafik\MySQL::getConnection($link), $query);
170
        }
171
 
172
        function mysql_unbuffered_query($query, \mysqli $link = null)
173
        {
174
            $link = \Dshafik\MySQL::getConnection($link);
175
            if (mysqli_real_query($link, $query)) {
176
                return mysqli_use_result($link);
177
            }
178
 
179
            return false;
180
        }
181
 
182
        function mysql_db_query($databaseName, $query, \mysqli $link = null)
183
        {
184
            if (mysql_select_db($databaseName, $link)) {
185
                return mysql_query($query, $link);
186
            }
187
            return false;
188
        }
189
 
190
        function mysql_list_dbs(\mysqli $link = null)
191
        {
192
            return mysql_query('SHOW DATABASES', $link);
193
        }
194
 
195
        function mysql_list_tables($databaseName, \mysqli $link = null)
196
        {
197
            $link = \Dshafik\MySQL::getConnection($link);
198
            $query = sprintf(
199
                'SHOW TABLES FROM `%s`',
200
                mysql_real_escape_string($databaseName, $link)
201
            );
202
            return mysql_query($query, $link);
203
        }
204
 
205
        function mysql_list_fields($databaseName, $tableName, \mysqli $link = null)
206
        {
207
            $link = \Dshafik\MySQL::getConnection($link);
208
 
209
            $query = sprintf(
210
                'SHOW COLUMNS FROM `%s`.`%s`',
211
                mysqli_real_escape_string($link, $databaseName),
212
                mysqli_real_escape_string($link, $tableName)
213
            );
214
 
215
            $result = mysql_query($query, $link);
216
 
217
            if ($result instanceof \mysqli_result) {
218
                $result->table = $tableName;
219
                return $result;
220
            }
221
 
222
            trigger_error('mysql_list_fields(): Unable to save MySQL query result', E_USER_WARNING);
223
            // @codeCoverageIgnoreStart
224
            return false;
225
            // @codeCoverageIgnoreEnd
226
        }
227
 
228
        function mysql_list_processes(\mysqli $link = null)
229
        {
230
            return mysql_query('SHOW PROCESSLIST', $link);
231
        }
232
 
233
        function mysql_error(\mysqli $link = null)
234
        {
235
            return mysqli_error(\Dshafik\MySQL::getConnection($link));
236
        }
237
 
238
        function mysql_errno(\mysqli $link = null)
239
        {
240
            return mysqli_errno(\Dshafik\MySQL::getConnection($link));
241
        }
242
 
243
        function mysql_affected_rows(\mysqli $link = null)
244
        {
245
            return mysqli_affected_rows(\Dshafik\MySQL::getConnection($link));
246
        }
247
 
248
        function mysql_insert_id($link = null) /*|*/
249
        {
250
            return mysqli_insert_id(\Dshafik\MySQL::getConnection($link));
251
        }
252
 
253
        function mysql_result($result, $row, $field = 0)
254
        {
255
            if (!\Dshafik\MySQL::checkValidResult($result, __FUNCTION__)) {
256
                // @codeCoverageIgnoreStart
257
                return false;
258
                // @codeCoverageIgnoreEnd
259
            }
260
 
261
            if (!mysqli_data_seek($result, $row)) {
262
                trigger_error(
263
                    sprintf(
264
                        'mysql_result(): Unable to jump to row %d on MySQL result index %s',
265
                        $row,
266
                        spl_object_hash($result)
267
                    ),
268
                    E_USER_WARNING
269
                );
270
                // @codeCoverageIgnoreStart
271
                return false;
272
                // @codeCoverageIgnoreEnd
273
            }
274
 
275
            $found = true;
276
            if (strpos($field, '.') !== false) {
277
                list($table, $name) = explode('.', $field);
278
                $i = 0;
279
                $found = false;
280
                mysqli_field_seek($result, 0);
281
                while ($column = mysqli_fetch_field($result)) {
282
                    if ($column->table === $table && $column->name === $name) {
283
                        $field = $i;
284
                        $found = true;
285
                        break;
286
                    }
287
                    $i++;
288
                }
289
            }
290
 
291
            $row = mysql_fetch_array($result);
292
            if ($found && array_key_exists($field, $row)) {
293
                return $row[$field];
294
            }
295
 
296
            trigger_error(
297
                sprintf(
298
                    '%s(): %s not found in MySQL result index %s',
299
                    __FUNCTION__,
300
                    $field,
301
                    spl_object_hash($result)
302
                ),
303
                E_USER_WARNING
304
            );
305
            // @codeCoverageIgnoreStart
306
            return false;
307
            // @codeCoverageIgnoreEnd
308
        }
309
 
310
        function mysql_num_rows($result)
311
        {
312
            if (!\Dshafik\MySQL::checkValidResult($result, __FUNCTION__)) {
313
                // @codeCoverageIgnoreStart
314
                return false;
315
                // @codeCoverageIgnoreEnd
316
            }
317
 
318
            $previous = error_reporting(0);
319
            $rows = mysqli_num_rows($result);
320
            error_reporting($previous);
321
 
322
            return $rows;
323
        }
324
 
325
        function mysql_num_fields($result)
326
        {
327
            if (!\Dshafik\MySQL::checkValidResult($result, __FUNCTION__)) {
328
                // @codeCoverageIgnoreStart
329
                return false;
330
                // @codeCoverageIgnoreEnd
331
            }
332
            return mysqli_num_fields($result);
333
        }
334
 
335
        function mysql_fetch_row($result)
336
        {
337
            if (!\Dshafik\MySQL::checkValidResult($result, __FUNCTION__)) {
338
                // @codeCoverageIgnoreStart
339
                return false;
340
                // @codeCoverageIgnoreEnd
341
            }
342
            return mysqli_fetch_row($result) ?: false;
343
        }
344
 
345
        function mysql_fetch_array($result, $resultType = MYSQL_BOTH)
346
        {
347
            if (!\Dshafik\MySQL::checkValidResult($result, __FUNCTION__)) {
348
                // @codeCoverageIgnoreStart
349
                return false;
350
                // @codeCoverageIgnoreEnd
351
            }
352
            return mysqli_fetch_array($result, $resultType) ?: false;
353
        }
354
 
355
        function mysql_fetch_assoc($result) /* : array|null */
356
        {
357
            if (!\Dshafik\MySQL::checkValidResult($result, __FUNCTION__)) {
358
                // @codeCoverageIgnoreStart
359
                return false;
360
                // @codeCoverageIgnoreEnd
361
            }
362
 
363
            return mysqli_fetch_assoc($result) ?: false;
364
        }
365
 
366
        function mysql_fetch_object($result, $class = null, array $params = array()) /* : object|null */
367
        {
368
            if (!\Dshafik\MySQL::checkValidResult($result, __FUNCTION__)) {
369
                // @codeCoverageIgnoreStart
370
                return false;
371
                // @codeCoverageIgnoreEnd
372
            }
373
 
374
            if ($class === null) {
375
                $object = mysqli_fetch_object($result);
376
            } else {
377
                $object = mysqli_fetch_object($result, $class, $params);
378
            }
379
 
380
            return $object ?: false;
381
        }
382
 
383
        function mysql_data_seek($result, $offset)
384
        {
385
            if (!\Dshafik\MySQL::checkValidResult($result, __FUNCTION__)) {
386
                // @codeCoverageIgnoreStart
387
                return false;
388
                // @codeCoverageIgnoreEnd
389
            }
390
            return mysqli_data_seek($result, $offset);
391
        }
392
 
393
        function mysql_fetch_lengths($result) /* : array|*/
394
        {
395
            if (!\Dshafik\MySQL::checkValidResult($result, __FUNCTION__)) {
396
                // @codeCoverageIgnoreStart
397
                return false;
398
                // @codeCoverageIgnoreEnd
399
            }
400
            return mysqli_fetch_lengths($result);
401
        }
402
 
403
        function mysql_fetch_field($result) /* : object|*/
404
        {
405
            if (!\Dshafik\MySQL::checkValidResult($result, __FUNCTION__)) {
406
                // @codeCoverageIgnoreStart
407
                return false;
408
                // @codeCoverageIgnoreEnd
409
            }
410
            return mysqli_fetch_field($result);
411
        }
412
 
413
        function mysql_field_seek($result, $field)
414
        {
415
            if (!\Dshafik\MySQL::checkValidResult($result, __FUNCTION__)) {
416
                // @codeCoverageIgnoreStart
417
                return false;
418
                // @codeCoverageIgnoreEnd
419
            }
420
            return mysqli_field_seek($result, $field);
421
        }
422
 
423
        function mysql_free_result($result)
424
        {
425
            if (!\Dshafik\MySQL::checkValidResult($result, __FUNCTION__)) {
426
                // @codeCoverageIgnoreStart
427
                return false;
428
                // @codeCoverageIgnoreEnd
429
            }
430
            return mysqli_free_result($result);
431
        }
432
 
433
        function mysql_field_name($result, $field)
434
        {
435
            if (!\Dshafik\MySQL::checkValidResult($result, __FUNCTION__)) {
436
                // @codeCoverageIgnoreStart
437
                return false;
438
                // @codeCoverageIgnoreEnd
439
            }
440
            return \Dshafik\MySQL::mysqlFieldInfo($result, $field, 'name');
441
        }
442
 
443
        function mysql_field_table($result, $field)
444
        {
445
            if (!\Dshafik\MySQL::checkValidResult($result, __FUNCTION__)) {
446
                // @codeCoverageIgnoreStart
447
                return false;
448
                // @codeCoverageIgnoreEnd
449
            }
450
            return \Dshafik\MySQL::mysqlFieldInfo($result, $field, 'table');
451
        }
452
 
453
        function mysql_field_len($result, $field)
454
        {
455
            if (!\Dshafik\MySQL::checkValidResult($result, __FUNCTION__)) {
456
                // @codeCoverageIgnoreStart
457
                return false;
458
                // @codeCoverageIgnoreEnd
459
            }
460
            return \Dshafik\MySQL::mysqlFieldInfo($result, $field, 'length');
461
        }
462
 
463
        function mysql_field_type($result, $field)
464
        {
465
            if (!\Dshafik\MySQL::checkValidResult($result, __FUNCTION__)) {
466
                // @codeCoverageIgnoreStart
467
                return false;
468
                // @codeCoverageIgnoreEnd
469
            }
470
            return \Dshafik\MySQL::mysqlFieldInfo($result, $field, 'type');
471
        }
472
 
473
        function mysql_field_flags($result, $field)
474
        {
475
            if (!\Dshafik\MySQL::checkValidResult($result, __FUNCTION__)) {
476
                // @codeCoverageIgnoreStart
477
                return false;
478
                // @codeCoverageIgnoreEnd
479
            }
480
            return \Dshafik\MySQL::mysqlFieldInfo($result, $field, 'flags');
481
        }
482
 
483
        function mysql_escape_string($unescapedString)
484
        {
485
            if (\Dshafik\MySQL::$last_connection === null) {
486
                trigger_error(
487
                    sprintf(
488
                        '%s() is insecure; use mysql_real_escape_string() instead!',
489
                        __FUNCTION__
490
                    ),
491
                    E_USER_NOTICE
492
                );
493
 
494
                return \Dshafik\MySQL::escapeString($unescapedString);
495
            }
496
            return mysql_real_escape_string($unescapedString, null);
497
        }
498
 
499
        function mysql_real_escape_string($unescapedString, \mysqli $link = null)
500
        {
501
            return mysqli_escape_string(\Dshafik\MySQL::getConnection($link), $unescapedString);
502
        }
503
 
504
        function mysql_stat(\mysqli $link = null)
505
        {
506
            return mysqli_stat(\Dshafik\MySQL::getConnection($link));
507
        }
508
 
509
        function mysql_thread_id(\mysqli $link = null)
510
        {
511
            return mysqli_thread_id(\Dshafik\MySQL::getConnection($link));
512
        }
513
 
514
        function mysql_client_encoding(\mysqli $link = null)
515
        {
516
            return mysqli_character_set_name(\Dshafik\MySQL::getConnection($link));
517
        }
518
 
519
        function mysql_ping(\mysqli $link = null)
520
        {
521
            return mysqli_ping(\Dshafik\MySQL::getConnection($link));
522
        }
523
 
524
        function mysql_get_client_info(\mysqli $link = null)
525
        {
526
            return mysqli_get_client_info(\Dshafik\MySQL::getConnection($link));
527
        }
528
 
529
        function mysql_get_host_info(\mysqli $link = null)
530
        {
531
            return mysqli_get_host_info(\Dshafik\MySQL::getConnection($link));
532
        }
533
 
534
        function mysql_get_proto_info(\mysqli $link = null)
535
        {
536
            return mysqli_get_proto_info(\Dshafik\MySQL::getConnection($link));
537
        }
538
 
539
        function mysql_get_server_info(\mysqli $link = null)
540
        {
541
            return mysqli_get_server_info(\Dshafik\MySQL::getConnection($link));
542
        }
543
 
544
        function mysql_info(\mysqli $link = null)
545
        {
546
            return mysqli_info(\Dshafik\MySQL::getConnection($link));
547
        }
548
 
549
        function mysql_set_charset($charset, \mysqli $link = null)
550
        {
551
            return mysqli_set_charset(\Dshafik\MySQL::getConnection($link), $charset);
552
        }
553
 
554
        function mysql_db_name($result, $row, $field = 0)
555
        {
556
            if (!\Dshafik\MySQL::checkValidResult($result, __FUNCTION__)) {
557
                // @codeCoverageIgnoreStart
558
                return false;
559
                // @codeCoverageIgnoreEnd
560
            }
561
 
562
            // Alias as per https://github.com/php/php-src/blob/PHP-5.6/ext/mysql/php_mysql.c#L319
563
            return mysql_result($result, $row, $field);
564
        }
565
 
566
        function mysql_tablename($result, $row)
567
        {
568
            if (!\Dshafik\MySQL::checkValidResult($result, __FUNCTION__)) {
569
                // @codeCoverageIgnoreStart
570
                return false;
571
                // @codeCoverageIgnoreEnd
572
            }
573
 
574
            // Alias as per http://lxr.php.net/xref/PHP_5_6/ext/mysql/php_mysql.c#321
575
            return mysql_result($result, $row, 'Table');
576
        }
577
 
578
        /* Aliases */
579
 
580
        function mysql_fieldname($result, $field)
581
        {
582
            return mysql_field_name($result, $field);
583
        }
584
 
585
        function mysql_fieldtable($result, $field)
586
        {
587
            return mysql_field_table($result, $field);
588
        }
589
 
590
        function mysql_fieldlen($result, $field)
591
        {
592
            return mysql_field_len($result, $field);
593
        }
594
 
595
        function mysql_fieldtype($result, $field)
596
        {
597
            return mysql_field_type($result, $field);
598
        }
599
 
600
        function mysql_fieldflags($result, $field)
601
        {
602
            return mysql_field_flags($result, $field);
603
        }
604
 
605
        function mysql_selectdb($databaseName, $link = null)
606
        {
607
            return mysql_select_db($databaseName, $link);
608
        }
609
 
610
        function mysql_freeresult($result)
611
        {
612
            return mysql_free_result($result);
613
        }
614
 
615
        function mysql_numfields($result)
616
        {
617
            return mysql_num_fields($result);
618
        }
619
 
620
        function mysql_numrows($result)
621
        {
622
            return mysql_num_rows($result);
623
        }
624
 
625
        function mysql_listdbs($link)
626
        {
627
            return mysql_list_dbs($link);
628
        }
629
 
630
        function mysql_listtables($databaseName, $link = null)
631
        {
632
            return mysql_list_tables($databaseName, $link);
633
        }
634
 
635
        function mysql_listfields($databaseName, $tableName, $link = null)
636
        {
637
            return mysql_list_fields($databaseName, $tableName, $link);
638
        }
639
 
640
        function mysql_dbname($result, $row, $field = 0)
641
        {
642
            return mysql_db_name($result, $row, $field);
643
        }
644
 
645
        function mysql_table_name($result, $row)
646
        {
647
            return mysql_tablename($result, $row);
648
        }
649
    }
650
}
651
 
652
namespace Dshafik {
653
 
654
    class MySQL
655
    {
656
        public static $last_connection = null;
657
        public static $connections = array();
658
 
659
        public static function getConnection($link = null, $func = null)
660
        {
661
            if ($link !== null) {
662
                return $link;
663
            }
664
 
665
            if (static::$last_connection === null) {
666
                $err = 'A link to the server could not be established';
667
                if ($func !== null) {
668
                    $err = $func . '(): no MySQL-Link resource supplied';
669
                }
670
                trigger_error($err, E_USER_WARNING);
671
                return false;
672
            }
673
 
674
            return static::$last_connection;
675
        }
676
 
677
        public static function mysqlFieldInfo(\mysqli_result $result, $field, $what)
678
        {
679
            try {
680
                $field = mysqli_fetch_field_direct($result, $field);
681
            } catch (\Exception $e) {
682
                trigger_error(
683
                    sprintf(
684
                        'mysql_field_%s(): Field %d is invalid for MySQL result index %s',
685
                        ($what !== 'length') ? $what : 'len',
686
                        $field,
687
                        spl_object_hash($result)
688
                    ),
689
                    E_USER_WARNING
690
                );
691
                // @codeCoverageIgnoreStart
692
                // PHPUnit turns the warning into an exception, so this never runs
693
                return false;
694
                // @codeCoverageIgnoreEnd
695
            }
696
 
697
            if ($what === 'type') {
698
                return static::getFieldType($field->type);
699
            }
700
 
701
            if ($what === 'flags') {
702
                return static::getFieldFlags($field->flags);
703
            }
704
 
705
            if (isset($field->{$what})) {
706
                return $field->{$what};
707
            }
708
 
709
            return false;
710
        }
711
 
712
        public static function checkValidResult($result, $function)
713
        {
714
            if (!($result instanceof \mysqli_result)) {
715
                if ($function !== 'mysql_fetch_object') {
716
                    trigger_error(
717
                        $function . '() expects parameter 1 to be resource, ' . strtolower(gettype($result)) . ' given',
718
                        E_USER_WARNING
719
                    );
720
                }
721
 
722
                if ($function === 'mysql_fetch_object') {
723
                    trigger_error(
724
                        $function . '(): supplied argument is not a valid MySQL result resource',
725
                        E_USER_WARNING
726
                    );
727
                }
728
                return false;
729
            }
730
 
731
            return true;
732
        }
733
 
734
        public static function escapeString($unescapedString)
735
        {
736
            $escapedString = '';
737
            for ($i = 0, $max = strlen($unescapedString); $i < $max; $i++) {
738
                $escapedString .= self::escapeChar($unescapedString[$i]);
739
            }
740
 
741
            return $escapedString;
742
        }
743
 
744
        protected static function getFieldFlags($what)
745
        {
746
            // Order of flags taken from http://lxr.php.net/xref/PHP_5_6/ext/mysql/php_mysql.c#2507
747
            $flags = array(
748
                MYSQLI_NOT_NULL_FLAG => 'not_null',
749
                MYSQLI_PRI_KEY_FLAG => 'primary_key',
750
                MYSQLI_UNIQUE_KEY_FLAG => 'unique_key',
751
                MYSQLI_MULTIPLE_KEY_FLAG => 'multiple_key',
752
                MYSQLI_BLOB_FLAG => 'blob',
753
                MYSQLI_UNSIGNED_FLAG => 'unsigned',
754
                MYSQLI_ZEROFILL_FLAG => 'zerofill',
755
                MYSQLI_BINARY_FLAG => 'binary',
756
                MYSQLI_ENUM_FLAG => 'enum',
757
                MYSQLI_SET_FLAG => 'set',
758
                MYSQLI_AUTO_INCREMENT_FLAG => 'auto_increment',
759
                MYSQLI_TIMESTAMP_FLAG => 'timestamp',
760
            );
761
 
762
            $fieldFlags = array();
763
            foreach ($flags as $flag => $value) {
764
                if ($what & $flag) {
765
                    $fieldFlags[] = $value;
766
                }
767
            }
768
 
769
            return implode(' ', $fieldFlags);
770
        }
771
 
772
        protected static function getFieldType($what)
773
        {
774
            $types = array(
775
                MYSQLI_TYPE_STRING => 'string',
776
                MYSQLI_TYPE_VAR_STRING => 'string',
777
                MYSQLI_TYPE_ENUM => 'string',
778
                MYSQLI_TYPE_SET => 'string',
779
 
780
                MYSQLI_TYPE_LONG => 'int',
781
                MYSQLI_TYPE_TINY => 'int',
782
                MYSQLI_TYPE_SHORT => 'int',
783
                MYSQLI_TYPE_INT24 => 'int',
784
                MYSQLI_TYPE_CHAR => 'int',
785
                MYSQLI_TYPE_LONGLONG => 'int',
786
 
787
                MYSQLI_TYPE_DECIMAL => 'real',
788
                MYSQLI_TYPE_FLOAT => 'real',
789
                MYSQLI_TYPE_DOUBLE => 'real',
790
                MYSQLI_TYPE_NEWDECIMAL => 'real',
791
 
792
                MYSQLI_TYPE_TINY_BLOB => 'blob',
793
                MYSQLI_TYPE_MEDIUM_BLOB => 'blob',
794
                MYSQLI_TYPE_LONG_BLOB => 'blob',
795
                MYSQLI_TYPE_BLOB => 'blob',
796
 
797
                MYSQLI_TYPE_NEWDATE => 'date',
798
                MYSQLI_TYPE_DATE => 'date',
799
                MYSQLI_TYPE_TIME => 'time',
800
                MYSQLI_TYPE_YEAR => 'year',
801
                MYSQLI_TYPE_DATETIME => 'datetime',
802
                MYSQLI_TYPE_TIMESTAMP => 'timestamp',
803
 
804
                MYSQLI_TYPE_NULL => 'null',
805
 
806
                MYSQLI_TYPE_GEOMETRY => 'geometry',
807
            );
808
 
809
            return isset($types[$what]) ? $types[$what] : 'unknown';
810
        }
811
 
812
        protected static function escapeChar($char)
813
        {
814
            switch ($char) {
815
                case "\0":
816
                    $esc = "\\0";
817
                    break;
818
                case "\n":
819
                    $esc = "\\n";
820
                    break;
821
                case "\r":
822
                    $esc = "\\r";
823
                    break;
824
                case '\\':
825
                case '\'':
826
                case '"':
827
                    $esc = "\\{$char}";
828
                    break;
829
                case "\032":
830
                    $esc = "\\Z";
831
                    break;
832
                default:
833
                    $esc = $char;
834
                    break;
835
            }
836
 
837
            return $esc;
838
        }
839
    }
840
}