| 1 |
<?php |
| 2 |
/** |
| 3 |
* Extend and replace the wpdb class. |
| 4 |
* |
| 5 |
* @package wp-sqlite-integration |
| 6 |
* @since 1.0.0 |
| 7 |
*/ |
| 8 |
|
| 9 |
/** |
| 10 |
* This class extends wpdb and replaces it. |
| 11 |
* |
| 12 |
* It also rewrites some methods that use mysql specific functions. |
| 13 |
*/ |
| 14 |
class WP_SQLite_DB extends wpdb { |
| 15 |
|
| 16 |
/** |
| 17 |
* Database Handle |
| 18 |
* |
| 19 |
* @var WP_SQLite_Translator |
| 20 |
*/ |
| 21 |
protected $dbh; |
| 22 |
|
| 23 |
/** |
| 24 |
* Backward compatibility, see wpdb::$allow_unsafe_unquoted_parameters. |
| 25 |
* |
| 26 |
* This property is mirroring "wpdb::$allow_unsafe_unquoted_parameters", |
| 27 |
* because some tests are accessing it externally using PHP reflection. |
| 28 |
* |
| 29 |
* @var |
| 30 |
*/ |
| 31 |
private $allow_unsafe_unquoted_parameters = true; |
| 32 |
|
| 33 |
/** |
| 34 |
* Connects to the SQLite database. |
| 35 |
* |
| 36 |
* Unlike for MySQL, no credentials and host are needed. |
| 37 |
* |
| 38 |
* @param string $dbname Database name. |
| 39 |
*/ |
| 40 |
public function __construct( $dbname ) { |
| 41 |
/** |
| 42 |
* We need to initialize the "$wpdb" global early, so that the SQLite |
| 43 |
* driver can configure the database. The call stack goes like this: |
| 44 |
* |
| 45 |
* 1. The "parent::__construct()" call executes "$this->db_connect()". |
| 46 |
* 2. The database connection call initializes the SQLite driver. |
| 47 |
* 3. The SQLite driver initializes and runs "WP_SQLite_Configurator". |
| 48 |
* 4. The configurator uses "WP_SQLite_Information_Schema_Reconstructor", |
| 49 |
* which requires "wp-admin/includes/schema.php" when in WordPress. |
| 50 |
* 5. The "wp-admin/includes/schema.php" requires the "$wpdb" global, |
| 51 |
* which creates a circular dependency. |
| 52 |
*/ |
| 53 |
$GLOBALS['wpdb'] = $this; |
| 54 |
|
| 55 |
parent::__construct( '', '', $dbname, '' ); |
| 56 |
$this->charset = 'utf8mb4'; |
| 57 |
} |
| 58 |
|
| 59 |
/** |
| 60 |
* Method to set character set for the database. |
| 61 |
* |
| 62 |
* This overrides wpdb::set_charset(), only to dummy out the MySQL function. |
| 63 |
* |
| 64 |
* @see wpdb::set_charset() |
| 65 |
* |
| 66 |
* @param resource $dbh The resource given by mysql_connect. |
| 67 |
* @param string $charset Optional. The character set. Default null. |
| 68 |
* @param string $collate Optional. The collation. Default null. |
| 69 |
*/ |
| 70 |
public function set_charset( $dbh, $charset = null, $collate = null ) { |
| 71 |
} |
| 72 |
|
| 73 |
/** |
| 74 |
* Method to get the character set for the database. |
| 75 |
* Hardcoded to utf8mb4 for now. |
| 76 |
* |
| 77 |
* @param string $table The table name. |
| 78 |
* @param string $column The column name. |
| 79 |
* |
| 80 |
* @return string The character set. |
| 81 |
*/ |
| 82 |
public function get_col_charset( $table, $column ) { |
| 83 |
// Hardcoded for now. |
| 84 |
return 'utf8mb4'; |
| 85 |
} |
| 86 |
|
| 87 |
/** |
| 88 |
* Changes the current SQL mode, and ensures its WordPress compatibility. |
| 89 |
* |
| 90 |
* If no modes are passed, it will ensure the current MySQL server modes are compatible. |
| 91 |
* |
| 92 |
* This overrides wpdb::set_sql_mode() while closely mirroring its implementation. |
| 93 |
* |
| 94 |
* @param array $modes Optional. A list of SQL modes to set. Default empty array. |
| 95 |
*/ |
| 96 |
public function set_sql_mode( $modes = array() ) { |
| 97 |
if ( ! $this->dbh instanceof WP_SQLite_Driver ) { |
| 98 |
return; |
| 99 |
} |
| 100 |
|
| 101 |
if ( empty( $modes ) ) { |
| 102 |
$result = $this->dbh->query( 'SELECT @@SESSION.sql_mode' ); |
| 103 |
if ( ! isset( $result[0] ) ) { |
| 104 |
return; |
| 105 |
} |
| 106 |
|
| 107 |
$modes_str = $result[0]->{'@@SESSION.sql_mode'}; |
| 108 |
if ( empty( $modes_str ) ) { |
| 109 |
return; |
| 110 |
} |
| 111 |
$modes = explode( ',', $modes_str ); |
| 112 |
} |
| 113 |
|
| 114 |
$modes = array_change_key_case( $modes, CASE_UPPER ); |
| 115 |
|
| 116 |
/** |
| 117 |
* Filters the list of incompatible SQL modes to exclude. |
| 118 |
* |
| 119 |
* @since 3.9.0 |
| 120 |
* |
| 121 |
* @param array $incompatible_modes An array of incompatible modes. |
| 122 |
*/ |
| 123 |
$incompatible_modes = (array) apply_filters( 'incompatible_sql_modes', $this->incompatible_modes ); |
| 124 |
|
| 125 |
foreach ( $modes as $i => $mode ) { |
| 126 |
if ( in_array( $mode, $incompatible_modes, true ) ) { |
| 127 |
unset( $modes[ $i ] ); |
| 128 |
} |
| 129 |
} |
| 130 |
$modes_str = implode( ',', $modes ); |
| 131 |
|
| 132 |
$this->dbh->query( "SET SESSION sql_mode='$modes_str'" ); |
| 133 |
} |
| 134 |
|
| 135 |
/** |
| 136 |
* Closes the current database connection. |
| 137 |
* Noop in SQLite. |
| 138 |
* |
| 139 |
* @return bool True to indicate the connection was successfully closed. |
| 140 |
*/ |
| 141 |
public function close() { |
| 142 |
return true; |
| 143 |
} |
| 144 |
|
| 145 |
/** |
| 146 |
* Method to select the database connection. |
| 147 |
* |
| 148 |
* This overrides wpdb::select(), only to dummy out the MySQL function. |
| 149 |
* |
| 150 |
* @see wpdb::select() |
| 151 |
* |
| 152 |
* @param string $db MySQL database name. Not used. |
| 153 |
* @param resource|null $dbh Optional link identifier. |
| 154 |
*/ |
| 155 |
public function select( $db, $dbh = null ) { |
| 156 |
$this->ready = true; |
| 157 |
} |
| 158 |
|
| 159 |
/** |
| 160 |
* Method to escape characters. |
| 161 |
* |
| 162 |
* This overrides wpdb::_real_escape() to avoid using mysql_real_escape_string(). |
| 163 |
* |
| 164 |
* @see wpdb::_real_escape() |
| 165 |
* |
| 166 |
* @param string $data The string to escape. |
| 167 |
* |
| 168 |
* @return string escaped |
| 169 |
*/ |
| 170 |
public function _real_escape( $data ) { |
| 171 |
if ( ! is_scalar( $data ) ) { |
| 172 |
return ''; |
| 173 |
} |
| 174 |
$escaped = addslashes( $data ); |
| 175 |
return $this->add_placeholder_escape( $escaped ); |
| 176 |
} |
| 177 |
|
| 178 |
/** |
| 179 |
* Method to dummy out wpdb::esc_like() function. |
| 180 |
* |
| 181 |
* WordPress 4.0.0 introduced esc_like() function that adds backslashes to %, |
| 182 |
* underscore and backslash, which is not interpreted as escape character |
| 183 |
* by SQLite. So we override it and dummy out this function. |
| 184 |
* |
| 185 |
* @param string $text The raw text to be escaped. The input typed by the user should have no |
| 186 |
* extra or deleted slashes. |
| 187 |
* |
| 188 |
* @return string Text in the form of a LIKE phrase. The output is not SQL safe. Call $wpdb::prepare() |
| 189 |
* or real_escape next. |
| 190 |
*/ |
| 191 |
public function esc_like( $text ) { |
| 192 |
// The new driver adds "ESCAPE '\\'" to every LIKE expression by default. |
| 193 |
// We only need to overload this function to a no-op for the old driver. |
| 194 |
if ( $this->dbh instanceof WP_SQLite_Driver ) { |
| 195 |
return parent::esc_like( $text ); |
| 196 |
} |
| 197 |
return $text; |
| 198 |
} |
| 199 |
|
| 200 |
/** |
| 201 |
* Prints SQL/DB error. |
| 202 |
* |
| 203 |
* This overrides wpdb::print_error() while closely mirroring its implementation. |
| 204 |
* |
| 205 |
* @global array $EZSQL_ERROR Stores error information of query and error string. |
| 206 |
* |
| 207 |
* @param string $str The error to display. |
| 208 |
* @return void|false Void if the showing of errors is enabled, false if disabled. |
| 209 |
*/ |
| 210 |
public function print_error( $str = '' ) { |
| 211 |
global $EZSQL_ERROR; |
| 212 |
|
| 213 |
if ( ! $str ) { |
| 214 |
$str = $this->last_error; |
| 215 |
} |
| 216 |
|
| 217 |
$EZSQL_ERROR[] = array( |
| 218 |
'query' => $this->last_query, |
| 219 |
'error_str' => $str, |
| 220 |
); |
| 221 |
|
| 222 |
if ( $this->suppress_errors ) { |
| 223 |
return false; |
| 224 |
} |
| 225 |
|
| 226 |
$caller = $this->get_caller(); |
| 227 |
if ( $caller ) { |
| 228 |
// Not translated, as this will only appear in the error log. |
| 229 |
$error_str = sprintf( 'WordPress database error %1$s for query %2$s made by %3$s', $str, $this->last_query, $caller ); |
| 230 |
} else { |
| 231 |
$error_str = sprintf( 'WordPress database error %1$s for query %2$s', $str, $this->last_query ); |
| 232 |
} |
| 233 |
|
| 234 |
error_log( $error_str ); |
| 235 |
|
| 236 |
// Are we showing errors? |
| 237 |
if ( ! $this->show_errors ) { |
| 238 |
return false; |
| 239 |
} |
| 240 |
|
| 241 |
wp_load_translations_early(); |
| 242 |
|
| 243 |
// If there is an error then take note of it. |
| 244 |
if ( is_multisite() ) { |
| 245 |
$msg = sprintf( |
| 246 |
"%s [%s]\n%s\n", |
| 247 |
__( 'WordPress database error:' ), |
| 248 |
$str, |
| 249 |
$this->last_query |
| 250 |
); |
| 251 |
|
| 252 |
if ( defined( 'ERRORLOGFILE' ) ) { |
| 253 |
error_log( $msg, 3, ERRORLOGFILE ); |
| 254 |
} |
| 255 |
if ( defined( 'DIEONDBERROR' ) ) { |
| 256 |
wp_die( $msg ); |
| 257 |
} |
| 258 |
} else { |
| 259 |
$str = htmlspecialchars( $str, ENT_QUOTES ); |
| 260 |
$query = htmlspecialchars( $this->last_query, ENT_QUOTES ); |
| 261 |
|
| 262 |
printf( |
| 263 |
'<div id="error"><p class="wpdberror"><strong>%s</strong> [%s]<br /><code>%s</code></p></div>', |
| 264 |
__( 'WordPress database error:' ), |
| 265 |
$str, |
| 266 |
$query |
| 267 |
); |
| 268 |
} |
| 269 |
} |
| 270 |
|
| 271 |
/** |
| 272 |
* Method to flush cached data. |
| 273 |
* |
| 274 |
* This overrides wpdb::flush(). This is not necessarily overridden, because |
| 275 |
* $result will never be resource. |
| 276 |
* |
| 277 |
* @see wpdb::flush |
| 278 |
*/ |
| 279 |
public function flush() { |
| 280 |
$this->last_result = array(); |
| 281 |
$this->col_info = null; |
| 282 |
$this->last_query = null; |
| 283 |
$this->rows_affected = 0; |
| 284 |
$this->num_rows = 0; |
| 285 |
$this->last_error = ''; |
| 286 |
$this->result = null; |
| 287 |
} |
| 288 |
|
| 289 |
/** |
| 290 |
* Method to do the database connection. |
| 291 |
* |
| 292 |
* This overrides wpdb::db_connect() to avoid using MySQL function. |
| 293 |
* |
| 294 |
* @see wpdb::db_connect() |
| 295 |
* |
| 296 |
* @param bool $allow_bail Not used. |
| 297 |
* @return void |
| 298 |
*/ |
| 299 |
public function db_connect( $allow_bail = true ) { |
| 300 |
if ( $this->dbh ) { |
| 301 |
return; |
| 302 |
} |
| 303 |
$this->init_charset(); |
| 304 |
|
| 305 |
$pdo = null; |
| 306 |
if ( isset( $GLOBALS['@pdo'] ) ) { |
| 307 |
$pdo = $GLOBALS['@pdo']; |
| 308 |
} |
| 309 |
if ( defined( 'WP_SQLITE_AST_DRIVER' ) && WP_SQLITE_AST_DRIVER ) { |
| 310 |
if ( null === $this->dbname || '' === $this->dbname ) { |
| 311 |
$this->bail( |
| 312 |
'The database name was not set. The SQLite driver requires a database name to be set to emulate MySQL information schema tables.', |
| 313 |
'db_connect_fail' |
| 314 |
); |
| 315 |
return false; |
| 316 |
} |
| 317 |
|
| 318 |
require_once __DIR__ . '/../../wp-includes/parser/class-wp-parser-grammar.php'; |
| 319 |
require_once __DIR__ . '/../../wp-includes/parser/class-wp-parser.php'; |
| 320 |
require_once __DIR__ . '/../../wp-includes/parser/class-wp-parser-node.php'; |
| 321 |
require_once __DIR__ . '/../../wp-includes/parser/class-wp-parser-token.php'; |
| 322 |
require_once __DIR__ . '/../../wp-includes/mysql/class-wp-mysql-token.php'; |
| 323 |
require_once __DIR__ . '/../../wp-includes/mysql/class-wp-mysql-lexer.php'; |
| 324 |
require_once __DIR__ . '/../../wp-includes/mysql/class-wp-mysql-parser.php'; |
| 325 |
require_once __DIR__ . '/../../wp-includes/sqlite-ast/class-wp-sqlite-connection.php'; |
| 326 |
require_once __DIR__ . '/../../wp-includes/sqlite-ast/class-wp-sqlite-configurator.php'; |
| 327 |
require_once __DIR__ . '/../../wp-includes/sqlite-ast/class-wp-sqlite-driver.php'; |
| 328 |
require_once __DIR__ . '/../../wp-includes/sqlite-ast/class-wp-sqlite-driver-exception.php'; |
| 329 |
require_once __DIR__ . '/../../wp-includes/sqlite-ast/class-wp-sqlite-information-schema-builder.php'; |
| 330 |
require_once __DIR__ . '/../../wp-includes/sqlite-ast/class-wp-sqlite-information-schema-exception.php'; |
| 331 |
require_once __DIR__ . '/../../wp-includes/sqlite-ast/class-wp-sqlite-information-schema-reconstructor.php'; |
| 332 |
$this->ensure_database_directory( FQDB ); |
| 333 |
|
| 334 |
try { |
| 335 |
$connection = new WP_SQLite_Connection( |
| 336 |
array( |
| 337 |
'pdo' => $pdo, |
| 338 |
'path' => FQDB, |
| 339 |
'journal_mode' => defined( 'SQLITE_JOURNAL_MODE' ) ? SQLITE_JOURNAL_MODE : null, |
| 340 |
) |
| 341 |
); |
| 342 |
$this->dbh = new WP_SQLite_Driver( $connection, $this->dbname ); |
| 343 |
$GLOBALS['@pdo'] = $this->dbh->get_connection()->get_pdo(); |
| 344 |
} catch ( Throwable $e ) { |
| 345 |
$this->last_error = $this->format_error_message( $e ); |
| 346 |
} |
| 347 |
} else { |
| 348 |
$this->dbh = new WP_SQLite_Translator( $pdo ); |
| 349 |
$this->last_error = $this->dbh->get_error_message(); |
| 350 |
$GLOBALS['@pdo'] = $this->dbh->get_pdo(); |
| 351 |
} |
| 352 |
if ( $this->last_error ) { |
| 353 |
return false; |
| 354 |
} |
| 355 |
$this->ready = true; |
| 356 |
$this->set_sql_mode(); |
| 357 |
} |
| 358 |
|
| 359 |
/** |
| 360 |
* Method to dummy out wpdb::check_connection() |
| 361 |
* |
| 362 |
* @param bool $allow_bail Not used. |
| 363 |
* |
| 364 |
* @return bool |
| 365 |
*/ |
| 366 |
public function check_connection( $allow_bail = true ) { |
| 367 |
return true; |
| 368 |
} |
| 369 |
|
| 370 |
/** |
| 371 |
* Prepares a SQL query for safe execution. |
| 372 |
* |
| 373 |
* See "wpdb::prepare()". This override only fixes a WPDB test issue. |
| 374 |
* |
| 375 |
* @param string $query Query statement with `sprintf()`-like placeholders. |
| 376 |
* @param array|mixed $args The array of variables or the first variable to substitute. |
| 377 |
* @param mixed ...$args Further variables to substitute when using individual arguments. |
| 378 |
* @return string|void Sanitized query string, if there is a query to prepare. |
| 379 |
*/ |
| 380 |
public function prepare( $query, ...$args ) { |
| 381 |
/* |
| 382 |
* Sync "$allow_unsafe_unquoted_parameters" with the WPDB parent property. |
| 383 |
* This is only needed because some WPDB tests are accessing the private |
| 384 |
* property externally via PHP reflection. This should be fixed WP tests. |
| 385 |
*/ |
| 386 |
$wpdb_allow_unsafe_unquoted_parameters = $this->__get( 'allow_unsafe_unquoted_parameters' ); |
| 387 |
if ( $wpdb_allow_unsafe_unquoted_parameters !== $this->allow_unsafe_unquoted_parameters ) { |
| 388 |
$property = new ReflectionProperty( 'wpdb', 'allow_unsafe_unquoted_parameters' ); |
| 389 |
$property->setAccessible( true ); |
| 390 |
$property->setValue( $this, $this->allow_unsafe_unquoted_parameters ); |
| 391 |
$property->setAccessible( false ); |
| 392 |
} |
| 393 |
|
| 394 |
return parent::prepare( $query, ...$args ); |
| 395 |
} |
| 396 |
|
| 397 |
/** |
| 398 |
* Performs a database query. |
| 399 |
* |
| 400 |
* This overrides wpdb::query() while closely mirroring its implementation. |
| 401 |
* |
| 402 |
* @see wpdb::query() |
| 403 |
* |
| 404 |
* @param string $query Database query. |
| 405 |
* |
| 406 |
* @param string $query Database query. |
| 407 |
* @return int|bool Boolean true for CREATE, ALTER, TRUNCATE and DROP queries. Number of rows |
| 408 |
* affected/selected for all other queries. Boolean false on error. |
| 409 |
*/ |
| 410 |
public function query( $query ) { |
| 411 |
if ( ! $this->ready ) { |
| 412 |
return false; |
| 413 |
} |
| 414 |
|
| 415 |
$query = apply_filters( 'query', $query ); |
| 416 |
|
| 417 |
if ( ! $query ) { |
| 418 |
$this->insert_id = 0; |
| 419 |
return false; |
| 420 |
} |
| 421 |
|
| 422 |
$this->flush(); |
| 423 |
|
| 424 |
// Log how the function was called. |
| 425 |
$this->func_call = "\$db->query(\"$query\")"; |
| 426 |
|
| 427 |
// Keep track of the last query for debug. |
| 428 |
$this->last_query = $query; |
| 429 |
|
| 430 |
/* |
| 431 |
* @TODO: WPDB uses "$this->check_current_query" to check table/column |
| 432 |
* charset and strip all invalid characters from the query. |
| 433 |
* This is an involved process that we can bypass for SQLite, |
| 434 |
* if we simply strip all invalid UTF-8 characters from the query. |
| 435 |
* |
| 436 |
* To do so, mb_convert_encoding can be used with an optional |
| 437 |
* fallback to a htmlspecialchars method. E.g.: |
| 438 |
* https://github.com/nette/utils/blob/be534713c227aeef57ce1883fc17bc9f9e29eca2/src/Utils/Strings.php#L42 |
| 439 |
*/ |
| 440 |
$this->_do_query( $query ); |
| 441 |
|
| 442 |
if ( $this->last_error ) { |
| 443 |
// Clear insert_id on a subsequent failed insert. |
| 444 |
if ( $this->insert_id && preg_match( '/^\s*(insert|replace)\s/i', $query ) ) { |
| 445 |
$this->insert_id = 0; |
| 446 |
} |
| 447 |
|
| 448 |
$this->print_error(); |
| 449 |
return false; |
| 450 |
} |
| 451 |
|
| 452 |
if ( preg_match( '/^\s*(create|alter|truncate|drop)\s/i', $query ) ) { |
| 453 |
$return_val = true; |
| 454 |
} elseif ( preg_match( '/^\s*(insert|delete|update|replace)\s/i', $query ) ) { |
| 455 |
if ( $this->dbh instanceof WP_SQLite_Driver ) { |
| 456 |
$this->rows_affected = $this->dbh->get_last_return_value(); |
| 457 |
} else { |
| 458 |
$this->rows_affected = $this->dbh->get_affected_rows(); |
| 459 |
} |
| 460 |
|
| 461 |
// Take note of the insert_id. |
| 462 |
if ( preg_match( '/^\s*(insert|replace)\s/i', $query ) ) { |
| 463 |
$this->insert_id = $this->dbh->get_insert_id(); |
| 464 |
} |
| 465 |
|
| 466 |
// Return number of rows affected. |
| 467 |
$return_val = $this->rows_affected; |
| 468 |
} else { |
| 469 |
$num_rows = 0; |
| 470 |
|
| 471 |
if ( is_array( $this->result ) ) { |
| 472 |
$this->last_result = $this->result; |
| 473 |
$num_rows = count( $this->result ); |
| 474 |
} |
| 475 |
|
| 476 |
// Log and return the number of rows selected. |
| 477 |
$this->num_rows = $num_rows; |
| 478 |
$return_val = $num_rows; |
| 479 |
} |
| 480 |
|
| 481 |
return $return_val; |
| 482 |
} |
| 483 |
|
| 484 |
/** |
| 485 |
* Internal function to perform the SQLite query call. |
| 486 |
* |
| 487 |
* This closely mirrors wpdb::_do_query(). |
| 488 |
* |
| 489 |
* @see wpdb::_do_query() |
| 490 |
* |
| 491 |
* @param string $query The query to run. |
| 492 |
*/ |
| 493 |
private function _do_query( $query ) { |
| 494 |
if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES ) { |
| 495 |
$this->timer_start(); |
| 496 |
} |
| 497 |
|
| 498 |
try { |
| 499 |
$this->result = $this->dbh->query( $query ); |
| 500 |
} catch ( Throwable $e ) { |
| 501 |
$this->last_error = $this->format_error_message( $e ); |
| 502 |
} |
| 503 |
|
| 504 |
if ( $this->dbh instanceof WP_SQLite_Translator ) { |
| 505 |
$this->last_error = $this->dbh->get_error_message(); |
| 506 |
} |
| 507 |
|
| 508 |
++$this->num_queries; |
| 509 |
|
| 510 |
if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES ) { |
| 511 |
$this->log_query( |
| 512 |
$query, |
| 513 |
$this->timer_stop(), |
| 514 |
$this->get_caller(), |
| 515 |
$this->time_start, |
| 516 |
array() |
| 517 |
); |
| 518 |
} |
| 519 |
} |
| 520 |
|
| 521 |
/** |
| 522 |
* Method to set the class variable $col_info. |
| 523 |
* |
| 524 |
* This overrides wpdb::load_col_info(), which uses a mysql function. |
| 525 |
* |
| 526 |
* @see wpdb::load_col_info() |
| 527 |
*/ |
| 528 |
protected function load_col_info() { |
| 529 |
if ( $this->col_info ) { |
| 530 |
return; |
| 531 |
} |
| 532 |
$this->col_info = $this->dbh->get_columns(); |
| 533 |
} |
| 534 |
|
| 535 |
/** |
| 536 |
* Method to return what the database can do. |
| 537 |
* |
| 538 |
* This overrides wpdb::has_cap() to avoid using MySQL functions. |
| 539 |
* SQLite supports subqueries, but not support collation, group_concat and set_charset. |
| 540 |
* |
| 541 |
* @see wpdb::has_cap() |
| 542 |
* |
| 543 |
* @param string $db_cap The feature to check for. Accepts 'collation', |
| 544 |
* 'group_concat', 'subqueries', 'set_charset', |
| 545 |
* 'utf8mb4', or 'utf8mb4_520'. |
| 546 |
* |
| 547 |
* @return bool Whether the database feature is supported, false otherwise. |
| 548 |
*/ |
| 549 |
public function has_cap( $db_cap ) { |
| 550 |
return 'subqueries' === strtolower( $db_cap ); |
| 551 |
} |
| 552 |
|
| 553 |
/** |
| 554 |
* Method to return database version number. |
| 555 |
* |
| 556 |
* This overrides wpdb::db_version() to avoid using MySQL function. |
| 557 |
* It returns mysql version number, but it means nothing for SQLite. |
| 558 |
* So it return the newest mysql version. |
| 559 |
* |
| 560 |
* @see wpdb::db_version() |
| 561 |
*/ |
| 562 |
public function db_version() { |
| 563 |
return '8.0'; |
| 564 |
} |
| 565 |
|
| 566 |
/** |
| 567 |
* Returns the version of the SQLite engine. |
| 568 |
* |
| 569 |
* @return string SQLite engine version as a string. |
| 570 |
*/ |
| 571 |
public function db_server_info() { |
| 572 |
return $this->dbh->get_sqlite_version(); |
| 573 |
} |
| 574 |
|
| 575 |
/** |
| 576 |
* Make sure the SQLite database directory exists and is writable. |
| 577 |
* Create .htaccess and index.php files to prevent direct access. |
| 578 |
* |
| 579 |
* @param string $database_path The path to the SQLite database file. |
| 580 |
*/ |
| 581 |
private function ensure_database_directory( string $database_path ) { |
| 582 |
$dir = dirname( $database_path ); |
| 583 |
|
| 584 |
// Set the umask to 0000 to apply permissions exactly as specified. |
| 585 |
// A non-zero umask affects new file and directory permissions. |
| 586 |
$umask = umask( 0 ); |
| 587 |
|
| 588 |
// Ensure database directory. |
| 589 |
if ( ! is_dir( $dir ) ) { |
| 590 |
if ( ! @mkdir( $dir, 0700, true ) ) { |
| 591 |
wp_die( sprintf( 'Failed to create database directory: %s', $dir ), 'Error!' ); |
| 592 |
} |
| 593 |
} |
| 594 |
if ( ! is_writable( $dir ) ) { |
| 595 |
wp_die( sprintf( 'Database directory is not writable: %s', $dir ), 'Error!' ); |
| 596 |
} |
| 597 |
|
| 598 |
// Ensure .htaccess file to prevent direct access. |
| 599 |
$path = $dir . DIRECTORY_SEPARATOR . '.htaccess'; |
| 600 |
if ( ! is_file( $path ) ) { |
| 601 |
$result = file_put_contents( $path, 'DENY FROM ALL', LOCK_EX ); |
| 602 |
if ( false === $result ) { |
| 603 |
wp_die( sprintf( 'Failed to create file: %s', $path ), 'Error!' ); |
| 604 |
} |
| 605 |
chmod( $path, 0600 ); |
| 606 |
} |
| 607 |
|
| 608 |
// Ensure index.php file to prevent direct access. |
| 609 |
$path = $dir . DIRECTORY_SEPARATOR . 'index.php'; |
| 610 |
if ( ! is_file( $path ) ) { |
| 611 |
$result = file_put_contents( $path, '<?php // Silence is gold. ?>', LOCK_EX ); |
| 612 |
if ( false === $result ) { |
| 613 |
wp_die( sprintf( 'Failed to create file: %s', $path ), 'Error!' ); |
| 614 |
} |
| 615 |
chmod( $path, 0600 ); |
| 616 |
} |
| 617 |
|
| 618 |
// Restore the original umask value. |
| 619 |
umask( $umask ); |
| 620 |
} |
| 621 |
|
| 622 |
|
| 623 |
/** |
| 624 |
* Format SQLite driver error message. |
| 625 |
* |
| 626 |
* @return string |
| 627 |
*/ |
| 628 |
private function format_error_message( Throwable $e ) { |
| 629 |
$output = '<div style="clear:both"> </div>' . PHP_EOL; |
| 630 |
|
| 631 |
// Queries. |
| 632 |
if ( $e instanceof WP_SQLite_Driver_Exception ) { |
| 633 |
$driver = $e->getDriver(); |
| 634 |
|
| 635 |
$output .= '<div class="queries" style="clear:both;margin-bottom:2px;border:red dotted thin;">' . PHP_EOL; |
| 636 |
$output .= '<p>MySQL query:</p>' . PHP_EOL; |
| 637 |
$output .= '<p>' . $driver->get_last_mysql_query() . '</p>' . PHP_EOL; |
| 638 |
$output .= '<p>Queries made or created this session were:</p>' . PHP_EOL; |
| 639 |
$output .= '<ol>' . PHP_EOL; |
| 640 |
foreach ( $driver->get_last_sqlite_queries() as $q ) { |
| 641 |
$message = "Executing: {$q['sql']} | " . ( $q['params'] ? 'parameters: ' . implode( ', ', $q['params'] ) : '(no parameters)' ); |
| 642 |
$output .= '<li>' . htmlspecialchars( $message ) . '</li>' . PHP_EOL; |
| 643 |
} |
| 644 |
$output .= '</ol>' . PHP_EOL; |
| 645 |
$output .= '</div>' . PHP_EOL; |
| 646 |
} |
| 647 |
|
| 648 |
// Message. |
| 649 |
$output .= '<div style="clear:both;margin-bottom:2px;border:red dotted thin;" class="error_message" style="border-bottom:dotted blue thin;">' . PHP_EOL; |
| 650 |
$output .= $e->getMessage() . PHP_EOL; |
| 651 |
$output .= '</div>' . PHP_EOL; |
| 652 |
|
| 653 |
// Backtrace. |
| 654 |
$output .= '<p>Backtrace:</p>' . PHP_EOL; |
| 655 |
$output .= '<pre>' . $e->getTraceAsString() . '</pre>' . PHP_EOL; |
| 656 |
return $output; |
| 657 |
} |
| 658 |
} |
| 659 |
|
