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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * The phpMyFAQ\Database\Pgsql class provides methods and functions for a PostgreSQL |
| 5 | * database. |
| 6 | * |
| 7 | * This Source Code Form is subject to the terms of the Mozilla Public License, |
| 8 | * v. 2.0. If a copy of the MPL was not distributed with this file, You can |
| 9 | * obtain one at https://mozilla.org/MPL/2.0/. |
| 10 | * |
| 11 | * @package phpMyFAQ |
| 12 | * @author Thorsten Rinne <thorsten@phpmyfaq.de> |
| 13 | * @author Tom Rochester <tom.rochester@gmail.com> |
| 14 | * @copyright 2005-2026 phpMyFAQ Team |
| 15 | * @license https://www.mozilla.org/MPL/2.0/ Mozilla Public License Version 2.0 |
| 16 | * @link https://www.phpmyfaq.de |
| 17 | * @since 2005-12-13 |
| 18 | */ |
| 19 | |
| 20 | declare(strict_types=1); |
| 21 | |
| 22 | namespace phpMyFAQ\Database; |
| 23 | |
| 24 | use Exception; |
| 25 | use PgSql\Connection; |
| 26 | use PgSql\Result; |
| 27 | use phpMyFAQ\Database; |
| 28 | use SensitiveParameter; |
| 29 | |
| 30 | /** |
| 31 | * Class Pgsql |
| 32 | * |
| 33 | * @package phpMyFAQ\Database |
| 34 | * @deprecated Use PDO instead. Will be removed in the v5.0 release. |
| 35 | */ |
| 36 | class Pgsql implements DatabaseDriver |
| 37 | { |
| 38 | /** |
| 39 | * The query log string. |
| 40 | */ |
| 41 | private string $sqlLog = ''; |
| 42 | |
| 43 | /** |
| 44 | * Tables. |
| 45 | * |
| 46 | * @var string[] |
| 47 | */ |
| 48 | public array $tableNames = []; |
| 49 | |
| 50 | /** |
| 51 | * The connection resource. |
| 52 | */ |
| 53 | private Connection|bool $conn = false; |
| 54 | |
| 55 | /** |
| 56 | * The last query result for tracking affected rows. |
| 57 | */ |
| 58 | private Result|bool|null $lastResult = null; |
| 59 | |
| 60 | /** |
| 61 | * Connects to the database. |
| 62 | * |
| 63 | * @param string $host Database hostname |
| 64 | * @param string $user Database username |
| 65 | * @param string $password Password |
| 66 | * @param string $database Database name |
| 67 | * @return null|bool true, if connected, otherwise false |
| 68 | */ |
| 69 | public function connect( |
| 70 | string $host, |
| 71 | #[SensitiveParameter] |
| 72 | string $user, |
| 73 | #[SensitiveParameter] |
| 74 | string $password, |
| 75 | string $database = '', |
| 76 | ?int $port = null, |
| 77 | ): ?bool { |
| 78 | $connectionString = sprintf( |
| 79 | 'host=%s port=%d dbname=%s user=%s password=%s', |
| 80 | $host, |
| 81 | $port, |
| 82 | $database, |
| 83 | $user, |
| 84 | $password, |
| 85 | ); |
| 86 | |
| 87 | try { |
| 88 | $this->conn = pg_connect($connectionString); |
| 89 | |
| 90 | if ($this->conn === false) { |
| 91 | throw new Exception('No PostgreSQL connection opened yet'); |
| 92 | } |
| 93 | |
| 94 | if ($database === '') { |
| 95 | throw new Exception('Database name is empty'); |
| 96 | } |
| 97 | } catch (Exception $exception) { |
| 98 | Database::errorPage($exception->getMessage()); |
| 99 | die(); |
| 100 | } |
| 101 | |
| 102 | return true; |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * This function sends a query to the database. |
| 107 | * |
| 108 | * @return bool|Result $result |
| 109 | */ |
| 110 | public function query(string $query, int $offset = 0, int $rowcount = 0): bool|Result |
| 111 | { |
| 112 | $this->sqlLog .= $query; |
| 113 | |
| 114 | if (0 < $rowcount) { |
| 115 | $query .= sprintf(' LIMIT %d OFFSET %d', $rowcount, $offset); |
| 116 | } |
| 117 | |
| 118 | /* @mago-expect analysis:possibly-invalid-argument - the pg_* functions are shadowed in tests; the stubbed connection must pass through */ |
| 119 | $result = pg_query($this->conn, $query); |
| 120 | |
| 121 | if (!$result) { |
| 122 | $this->sqlLog .= $this->error(); |
| 123 | return false; |
| 124 | } |
| 125 | |
| 126 | $this->lastResult = $result; |
| 127 | |
| 128 | if (pg_result_status($result) === PGSQL_COMMAND_OK) { |
| 129 | return true; |
| 130 | } |
| 131 | |
| 132 | return $result; |
| 133 | } |
| 134 | |
| 135 | /** |
| 136 | * Sends a parameterized query; `?` placeholders are converted to the |
| 137 | * PostgreSQL `$n` form and bound via pg_query_params(). |
| 138 | * |
| 139 | * @param array<int, string|int|float|null> $params |
| 140 | */ |
| 141 | public function queryPrepared(string $query, array $params): bool|Result |
| 142 | { |
| 143 | $this->sqlLog .= $query; |
| 144 | |
| 145 | if (!$this->conn instanceof Connection) { |
| 146 | return false; |
| 147 | } |
| 148 | |
| 149 | $result = pg_query_params($this->conn, self::numberPlaceholders($query), $params); |
| 150 | |
| 151 | if (!$result) { |
| 152 | $this->sqlLog .= $this->error(); |
| 153 | return false; |
| 154 | } |
| 155 | |
| 156 | $this->lastResult = $result; |
| 157 | |
| 158 | return $result; |
| 159 | } |
| 160 | |
| 161 | /** |
| 162 | * Rewrites positional `?` placeholders to PostgreSQL's `$1..$n`, |
| 163 | * leaving question marks inside single-quoted literals untouched. |
| 164 | */ |
| 165 | public static function numberPlaceholders(string $query): string |
| 166 | { |
| 167 | $converted = ''; |
| 168 | $position = 0; |
| 169 | $inLiteral = false; |
| 170 | |
| 171 | foreach (str_split($query) as $character) { |
| 172 | if ($character === "'") { |
| 173 | $inLiteral = !$inLiteral; |
| 174 | } |
| 175 | |
| 176 | if ($character === '?' && !$inLiteral) { |
| 177 | ++$position; |
| 178 | $converted .= '$' . $position; |
| 179 | continue; |
| 180 | } |
| 181 | |
| 182 | $converted .= $character; |
| 183 | } |
| 184 | |
| 185 | return $converted; |
| 186 | } |
| 187 | |
| 188 | /** |
| 189 | * Returns the number of rows affected by the last INSERT, UPDATE, or DELETE query. |
| 190 | */ |
| 191 | public function affectedRows(): int |
| 192 | { |
| 193 | if ($this->lastResult instanceof Result) { |
| 194 | return pg_affected_rows($this->lastResult); |
| 195 | } |
| 196 | |
| 197 | return 0; |
| 198 | } |
| 199 | |
| 200 | /** |
| 201 | * Returns the error string. |
| 202 | */ |
| 203 | public function error(): string |
| 204 | { |
| 205 | /* @mago-expect analysis:possibly-invalid-argument - the pg_* functions are shadowed in tests; the stubbed connection must pass through */ |
| 206 | return pg_last_error($this->conn); |
| 207 | } |
| 208 | |
| 209 | /** |
| 210 | * Escapes a string for use in a query. |
| 211 | */ |
| 212 | public function escape(string $string): string |
| 213 | { |
| 214 | /* @mago-expect analysis:possibly-invalid-argument - the pg_* functions are shadowed in tests; the stubbed connection must pass through */ |
| 215 | return pg_escape_string($this->conn, $string); |
| 216 | } |
| 217 | |
| 218 | /** |
| 219 | * Fetches a complete result as an object. |
| 220 | * |
| 221 | * @param mixed $result Resultset |
| 222 | * @throws Exception |
| 223 | * @return list<\stdClass>|null |
| 224 | */ |
| 225 | public function fetchAll(mixed $result): ?array |
| 226 | { |
| 227 | $ret = []; |
| 228 | if (false === $result) { |
| 229 | throw new Exception('Error while fetching result: ' . $this->error()); |
| 230 | } |
| 231 | |
| 232 | while (true) { |
| 233 | $row = $this->fetchObject($result); |
| 234 | if (!is_object($row)) { |
| 235 | break; |
| 236 | } |
| 237 | |
| 238 | $ret[] = $row; |
| 239 | } |
| 240 | |
| 241 | return $ret; |
| 242 | } |
| 243 | |
| 244 | /** |
| 245 | * Fetch a result row as an object. |
| 246 | * |
| 247 | * @return \stdClass|false|null |
| 248 | */ |
| 249 | public function fetchObject(mixed $result): mixed |
| 250 | { |
| 251 | /* @mago-expect lint:inline-variable-return - the variable carries the @var type for mago analyze */ |
| 252 | /* @mago-expect analysis:mixed-argument - the pg_* functions are shadowed in tests; the stubbed result must pass through */ |
| 253 | /** @var \stdClass|false|null $row */ |
| 254 | $row = pg_fetch_object($result); |
| 255 | |
| 256 | return $row; |
| 257 | } |
| 258 | |
| 259 | /** |
| 260 | * Fetch a result row. |
| 261 | */ |
| 262 | public function fetchRow(mixed $result): array|false |
| 263 | { |
| 264 | /* @mago-expect analysis:mixed-argument - the pg_* functions are shadowed in tests; the stubbed result must pass through */ |
| 265 | return pg_fetch_row($result); |
| 266 | } |
| 267 | |
| 268 | /** |
| 269 | * Number of rows in a result. |
| 270 | */ |
| 271 | public function numRows(mixed $result): int |
| 272 | { |
| 273 | /* @mago-expect analysis:mixed-argument - the pg_* functions are shadowed in tests; the stubbed result must pass through */ |
| 274 | return pg_num_rows($result); |
| 275 | } |
| 276 | |
| 277 | /** |
| 278 | * Logs the queries. |
| 279 | */ |
| 280 | public function log(): string |
| 281 | { |
| 282 | return $this->sqlLog; |
| 283 | } |
| 284 | |
| 285 | /** |
| 286 | * This function returns the table status. |
| 287 | * |
| 288 | * @param string $prefix Table prefix |
| 289 | */ |
| 290 | public function getTableStatus(string $prefix = ''): array |
| 291 | { |
| 292 | $select = 'SELECT relname FROM pg_stat_user_tables ORDER BY relname;'; |
| 293 | $arr = []; |
| 294 | $result = $this->query($select); |
| 295 | while (true) { |
| 296 | $row = $this->fetchArray($result); |
| 297 | if (!is_array($row) || !array_key_exists('relname', $row)) { |
| 298 | break; |
| 299 | } |
| 300 | |
| 301 | $tableName = (string) $row['relname']; |
| 302 | $arr[$tableName] = $this->getOne('SELECT count(1) FROM ' . $tableName . ';'); |
| 303 | } |
| 304 | |
| 305 | return $arr; |
| 306 | } |
| 307 | |
| 308 | /** |
| 309 | * Fetch a result row as an object. |
| 310 | */ |
| 311 | public function fetchArray(mixed $result): ?array |
| 312 | { |
| 313 | /* @mago-expect analysis:mixed-argument - the pg_* functions are shadowed in tests; the stubbed result must pass through */ |
| 314 | $row = pg_fetch_array($result, row: null, mode: PGSQL_ASSOC); |
| 315 | |
| 316 | return is_array($row) ? $row : []; |
| 317 | } |
| 318 | |
| 319 | /** |
| 320 | * Returns just one row. |
| 321 | */ |
| 322 | private function getOne(string $query): string |
| 323 | { |
| 324 | /* @mago-expect analysis:possibly-invalid-argument - the pg_* functions are shadowed in tests; the stubbed result must pass through */ |
| 325 | $row = pg_fetch_row($this->query($query)); |
| 326 | |
| 327 | return is_array($row) ? (string) ($row[0] ?? '') : ''; |
| 328 | } |
| 329 | |
| 330 | /** |
| 331 | * Returns the next ID of a table. |
| 332 | * |
| 333 | * @param string $table the name of the table |
| 334 | * @param string $column the name of the ID column |
| 335 | */ |
| 336 | public function nextId(string $table, string $column): int |
| 337 | { |
| 338 | return (int) $this->getOne("SELECT nextval('" . $table . '_' . $column . "_seq') as current_id;"); |
| 339 | } |
| 340 | |
| 341 | /** |
| 342 | * This function returns the client version string. |
| 343 | */ |
| 344 | public function clientVersion(): string |
| 345 | { |
| 346 | /* @mago-expect analysis:possibly-invalid-argument - the pg_* functions are shadowed in tests; the stubbed connection must pass through */ |
| 347 | $pgVersion = pg_version($this->conn); |
| 348 | |
| 349 | return (string) ($pgVersion['client'] ?? 'n/a'); |
| 350 | } |
| 351 | |
| 352 | /** |
| 353 | * Returns the server version string. |
| 354 | */ |
| 355 | public function serverVersion(): string |
| 356 | { |
| 357 | /* @mago-expect analysis:possibly-invalid-argument - the pg_* functions are shadowed in tests; the stubbed connection must pass through */ |
| 358 | $pgVersion = pg_version($this->conn); |
| 359 | |
| 360 | return (string) ($pgVersion['server'] ?? 'n/a'); |
| 361 | } |
| 362 | |
| 363 | /** |
| 364 | * Returns an array with all table names. |
| 365 | * |
| 366 | * @todo Have to be refactored because of https://github.com/thorsten/phpMyFAQ/issues/965 |
| 367 | * |
| 368 | * @param string $prefix Table prefix |
| 369 | * |
| 370 | * @return string[] |
| 371 | */ |
| 372 | public function getTableNames(string $prefix = ''): array |
| 373 | { |
| 374 | return $this->tableNames = [ |
| 375 | $prefix . 'faqadminlog', |
| 376 | $prefix . 'faqattachment', |
| 377 | $prefix . 'faqattachment_file', |
| 378 | $prefix . 'faqbackup', |
| 379 | $prefix . 'faqbookmarks', |
| 380 | $prefix . 'faqcaptcha', |
| 381 | $prefix . 'faqcategories', |
| 382 | $prefix . 'faqcategoryrelations', |
| 383 | $prefix . 'faqcategory_group', |
| 384 | $prefix . 'faqcategory_news', |
| 385 | $prefix . 'faqcategory_order', |
| 386 | $prefix . 'faqcategory_user', |
| 387 | $prefix . 'faqchanges', |
| 388 | $prefix . 'faqchat_messages', |
| 389 | $prefix . 'faqcomments', |
| 390 | $prefix . 'faqconfig', |
| 391 | $prefix . 'faqcustompages', |
| 392 | $prefix . 'faqdata', |
| 393 | $prefix . 'faqdata_group', |
| 394 | $prefix . 'faqdata_revisions', |
| 395 | $prefix . 'faqdata_tags', |
| 396 | $prefix . 'faqdata_user', |
| 397 | $prefix . 'faqforms', |
| 398 | $prefix . 'faqglossary', |
| 399 | $prefix . 'faqgroup', |
| 400 | $prefix . 'faqgroup_right', |
| 401 | $prefix . 'faqinstances', |
| 402 | $prefix . 'faqinstances_config', |
| 403 | $prefix . 'faqnews', |
| 404 | $prefix . 'faqquestions', |
| 405 | $prefix . 'faqright', |
| 406 | $prefix . 'faqsearches', |
| 407 | $prefix . 'faqseo', |
| 408 | $prefix . 'faqsessions', |
| 409 | $prefix . 'faqstopwords', |
| 410 | $prefix . 'faqtags', |
| 411 | $prefix . 'faquser', |
| 412 | $prefix . 'faquserdata', |
| 413 | $prefix . 'faquserlogin', |
| 414 | $prefix . 'faquser_group', |
| 415 | $prefix . 'faquser_right', |
| 416 | $prefix . 'faqvisits', |
| 417 | $prefix . 'faqvoting', |
| 418 | ]; |
| 419 | } |
| 420 | |
| 421 | /** |
| 422 | * Closes the connection to the database. |
| 423 | */ |
| 424 | public function close(): bool |
| 425 | { |
| 426 | /* @mago-expect analysis:possibly-invalid-argument - the pg_* functions are shadowed in tests; the stubbed connection must pass through */ |
| 427 | return pg_close($this->conn); |
| 428 | } |
| 429 | |
| 430 | /** |
| 431 | * Returns the ID of the last inserted row. |
| 432 | */ |
| 433 | public function lastInsertId(): int|string |
| 434 | { |
| 435 | /* @mago-expect analysis:possibly-invalid-argument - the pg_* functions are shadowed in tests; the stubbed connection must pass through */ |
| 436 | $result = pg_query($this->conn, query: 'SELECT lastval()'); |
| 437 | if ($result === false) { |
| 438 | return 0; |
| 439 | } |
| 440 | |
| 441 | $row = pg_fetch_row($result); |
| 442 | if ($row === false) { |
| 443 | return 0; |
| 444 | } |
| 445 | |
| 446 | return (int) $row[0]; |
| 447 | } |
| 448 | |
| 449 | public function now(): string |
| 450 | { |
| 451 | return 'CURRENT_TIMESTAMP'; |
| 452 | } |
| 453 | } |