676 lines
19 KiB
PHP
676 lines
19 KiB
PHP
<?php
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/**
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* Extend and replace the wpdb class.
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*
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* @package wp-sqlite-integration
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* @since 1.0.0
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*/
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/**
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* This class extends wpdb and replaces it.
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*
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* It also rewrites some methods that use mysql specific functions.
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*/
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class WP_SQLite_DB extends wpdb {
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/**
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* Database Handle
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*
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* @var WP_SQLite_Driver
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*/
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protected $dbh;
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/**
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* Backward compatibility, see wpdb::$allow_unsafe_unquoted_parameters.
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*
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* This property is mirroring "wpdb::$allow_unsafe_unquoted_parameters",
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* because some tests are accessing it externally using PHP reflection.
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*
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* @var
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*/
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private $allow_unsafe_unquoted_parameters = true;
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/**
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* Connects to the SQLite database.
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*
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* Unlike for MySQL, no credentials and host are needed.
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*
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* @param string $dbname Database name.
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*/
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public function __construct( $dbname ) {
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/**
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* We need to initialize the "$wpdb" global early, so that the SQLite
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* driver can configure the database. The call stack goes like this:
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*
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* 1. The "parent::__construct()" call executes "$this->db_connect()".
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* 2. The database connection call initializes the SQLite driver.
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* 3. The SQLite driver initializes and runs "WP_SQLite_Configurator".
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* 4. The configurator uses "WP_SQLite_Information_Schema_Reconstructor",
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* which requires "wp-admin/includes/schema.php" when in WordPress.
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* 5. The "wp-admin/includes/schema.php" requires the "$wpdb" global,
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* which creates a circular dependency.
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*/
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$GLOBALS['wpdb'] = $this;
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parent::__construct( '', '', $dbname, '' );
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$this->charset = 'utf8mb4';
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}
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/**
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* Method to set character set for the database.
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*
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* This overrides wpdb::set_charset(), only to dummy out the MySQL function.
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*
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* @see wpdb::set_charset()
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*
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* @param resource $dbh The resource given by mysql_connect.
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* @param string $charset Optional. The character set. Default null.
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* @param string $collate Optional. The collation. Default null.
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*/
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public function set_charset( $dbh, $charset = null, $collate = null ) {
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}
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/**
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* Method to get the character set for the database.
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* Hardcoded to utf8mb4 for now.
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*
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* @param string $table The table name.
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* @param string $column The column name.
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*
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* @return string The character set.
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*/
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public function get_col_charset( $table, $column ) {
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// Hardcoded for now.
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return 'utf8mb4';
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}
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/**
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* Changes the current SQL mode, and ensures its WordPress compatibility.
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*
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* If no modes are passed, it will ensure the current MySQL server modes are compatible.
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*
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* This overrides wpdb::set_sql_mode() while closely mirroring its implementation.
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*
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* @param array $modes Optional. A list of SQL modes to set. Default empty array.
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*/
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public function set_sql_mode( $modes = array() ) {
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if ( empty( $modes ) ) {
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$result = $this->dbh->query( 'SELECT @@SESSION.sql_mode' );
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if ( ! isset( $result[0] ) ) {
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return;
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}
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$modes_str = $result[0]->{'@@SESSION.sql_mode'};
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if ( empty( $modes_str ) ) {
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return;
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}
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$modes = explode( ',', $modes_str );
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}
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$modes = array_change_key_case( $modes, CASE_UPPER );
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/**
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* Filters the list of incompatible SQL modes to exclude.
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*
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* @since 3.9.0
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*
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* @param array $incompatible_modes An array of incompatible modes.
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*/
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$incompatible_modes = (array) apply_filters( 'incompatible_sql_modes', $this->incompatible_modes );
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foreach ( $modes as $i => $mode ) {
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if ( in_array( $mode, $incompatible_modes, true ) ) {
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unset( $modes[ $i ] );
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}
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}
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$modes_str = implode( ',', $modes );
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$this->dbh->query( "SET SESSION sql_mode='$modes_str'" );
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}
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/**
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* Closes the current database connection.
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* Noop in SQLite.
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*
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* @return bool True to indicate the connection was successfully closed.
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*/
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public function close() {
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return true;
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}
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/**
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* Method to select the database connection.
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*
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* This overrides wpdb::select(), only to dummy out the MySQL function.
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*
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* @see wpdb::select()
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*
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* @param string $db MySQL database name. Not used.
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* @param resource|null $dbh Optional link identifier.
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*/
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public function select( $db, $dbh = null ) {
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$this->ready = true;
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}
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/**
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* Method to escape characters.
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*
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* This overrides wpdb::_real_escape() to avoid using mysql_real_escape_string().
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*
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* @see wpdb::_real_escape()
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*
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* @param string $data The string to escape.
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*
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* @return string escaped
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*/
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public function _real_escape( $data ) {
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if ( ! is_scalar( $data ) ) {
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return '';
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}
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$escaped = addslashes( $data );
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return $this->add_placeholder_escape( $escaped );
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}
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/**
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* Prints SQL/DB error.
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*
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* This overrides wpdb::print_error() while closely mirroring its implementation.
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*
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* @global array $EZSQL_ERROR Stores error information of query and error string.
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*
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* @param string $str The error to display.
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* @return void|false Void if the showing of errors is enabled, false if disabled.
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*/
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public function print_error( $str = '' ) {
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global $EZSQL_ERROR;
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if ( ! $str ) {
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$str = $this->last_error;
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}
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$EZSQL_ERROR[] = array(
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'query' => $this->last_query,
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'error_str' => $str,
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);
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if ( $this->suppress_errors ) {
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return false;
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}
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$caller = $this->get_caller();
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if ( $caller ) {
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// Not translated, as this will only appear in the error log.
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$error_str = sprintf( 'WordPress database error %1$s for query %2$s made by %3$s', $str, $this->last_query, $caller );
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} else {
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$error_str = sprintf( 'WordPress database error %1$s for query %2$s', $str, $this->last_query );
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}
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error_log( $error_str );
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// Are we showing errors?
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if ( ! $this->show_errors ) {
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return false;
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}
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wp_load_translations_early();
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// If there is an error then take note of it.
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if ( is_multisite() ) {
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$msg = sprintf(
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"%s [%s]\n%s\n",
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__( 'WordPress database error:' ),
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$str,
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$this->last_query
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);
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if ( defined( 'ERRORLOGFILE' ) ) {
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error_log( $msg, 3, ERRORLOGFILE );
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}
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if ( defined( 'DIEONDBERROR' ) ) {
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wp_die( $msg );
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}
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} else {
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$str = htmlspecialchars( $str, ENT_QUOTES );
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$query = htmlspecialchars( $this->last_query, ENT_QUOTES );
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printf(
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'<div id="error"><p class="wpdberror"><strong>%s</strong> [%s]<br /><code>%s</code></p></div>',
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__( 'WordPress database error:' ),
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$str,
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$query
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);
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}
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}
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/**
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* Method to flush cached data.
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*
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* This overrides wpdb::flush(). This is not necessarily overridden, because
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* $result will never be resource.
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*
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* @see wpdb::flush
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*/
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public function flush() {
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$this->last_result = array();
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$this->col_info = null;
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$this->last_query = null;
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$this->rows_affected = 0;
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$this->num_rows = 0;
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$this->last_error = '';
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$this->result = null;
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}
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/**
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* Method to do the database connection.
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*
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* This overrides wpdb::db_connect() to avoid using MySQL function.
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*
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* @see wpdb::db_connect()
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*
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* @param bool $allow_bail Not used.
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* @return void
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*/
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public function db_connect( $allow_bail = true ) {
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if ( $this->dbh ) {
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return;
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}
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$this->init_charset();
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$pdo = null;
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if ( isset( $GLOBALS['@pdo'] ) ) {
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$pdo = $GLOBALS['@pdo'];
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}
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// Migrate the database file from a legacy path, if it exists.
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if ( ! defined( 'DB_FILE' ) && ! file_exists( FQDB ) ) {
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$old_db_path = FQDBDIR . '.ht.sqlite.php';
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if ( file_exists( $old_db_path ) ) {
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if ( ! rename( $old_db_path, FQDB ) ) {
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wp_die( 'Failed to rename database file.', 'Error!' );
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}
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foreach ( array( '-wal', '-shm', '-journal' ) as $suffix ) {
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if ( file_exists( $old_db_path . $suffix ) ) {
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if ( ! rename( $old_db_path . $suffix, FQDB . $suffix ) ) {
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wp_die( 'Failed to rename database file.', 'Error!' );
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}
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}
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}
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}
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}
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if ( null === $this->dbname || '' === $this->dbname ) {
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$this->bail(
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'The database name was not set. The SQLite driver requires a database name to be set to emulate MySQL information schema tables.',
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'db_connect_fail'
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);
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return false;
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}
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$this->ensure_database_directory( FQDB );
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try {
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$connection = new WP_SQLite_Connection(
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array(
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'pdo' => $pdo,
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'path' => FQDB,
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'journal_mode' => defined( 'SQLITE_JOURNAL_MODE' ) ? SQLITE_JOURNAL_MODE : null,
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)
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);
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$this->dbh = new WP_SQLite_Driver( $connection, $this->dbname );
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$GLOBALS['@pdo'] = $this->dbh->get_connection()->get_pdo();
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} catch ( Throwable $e ) {
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$this->last_error = $this->format_error_message( $e );
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}
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if ( $this->last_error ) {
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return false;
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}
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$this->ready = true;
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$this->set_sql_mode();
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}
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/**
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* Method to dummy out wpdb::check_connection()
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*
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* @param bool $allow_bail Not used.
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*
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* @return bool
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*/
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public function check_connection( $allow_bail = true ) {
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return true;
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}
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/**
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* Prepares a SQL query for safe execution.
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*
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* See "wpdb::prepare()". This override only fixes a WPDB test issue.
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*
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* @param string $query Query statement with `sprintf()`-like placeholders.
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* @param array|mixed $args The array of variables or the first variable to substitute.
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* @param mixed ...$args Further variables to substitute when using individual arguments.
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* @return string|void Sanitized query string, if there is a query to prepare.
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*/
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public function prepare( $query, ...$args ) {
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/*
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* Sync "$allow_unsafe_unquoted_parameters" with the WPDB parent property.
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* This is only needed because some WPDB tests are accessing the private
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* property externally via PHP reflection. This should be fixed WP tests.
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*/
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$wpdb_allow_unsafe_unquoted_parameters = $this->__get( 'allow_unsafe_unquoted_parameters' );
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if ( $wpdb_allow_unsafe_unquoted_parameters !== $this->allow_unsafe_unquoted_parameters ) {
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$property = new ReflectionProperty( 'wpdb', 'allow_unsafe_unquoted_parameters' );
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$property->setAccessible( true );
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$property->setValue( $this, $this->allow_unsafe_unquoted_parameters );
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$property->setAccessible( false );
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}
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return parent::prepare( $query, ...$args );
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}
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/**
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* Performs a database query.
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*
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* This overrides wpdb::query() while closely mirroring its implementation.
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*
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* @see wpdb::query()
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*
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* @param string $query Database query.
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*
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* @param string $query Database query.
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* @return int|bool Boolean true for CREATE, ALTER, TRUNCATE and DROP queries. Number of rows
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* affected/selected for all other queries. Boolean false on error.
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*/
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public function query( $query ) {
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// Query Monitor integration:
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$query_monitor_active = defined( 'SQLITE_QUERY_MONITOR_LOADED' ) && SQLITE_QUERY_MONITOR_LOADED;
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if ( $query_monitor_active && $this->show_errors ) {
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$this->hide_errors();
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}
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if ( ! $this->ready ) {
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return false;
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}
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$query = apply_filters( 'query', $query );
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if ( ! $query ) {
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$this->insert_id = 0;
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return false;
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}
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$this->flush();
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// Log how the function was called.
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$this->func_call = "\$db->query(\"$query\")";
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// Keep track of the last query for debug.
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$this->last_query = $query;
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// Save the query count before running another query.
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$last_query_count = count( $this->queries ?? array() );
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/*
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* @TODO: WPDB uses "$this->check_current_query" to check table/column
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* charset and strip all invalid characters from the query.
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* This is an involved process that we can bypass for SQLite,
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* if we simply strip all invalid UTF-8 characters from the query.
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*
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* To do so, mb_convert_encoding can be used with an optional
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* fallback to a htmlspecialchars method. E.g.:
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* https://github.com/nette/utils/blob/be534713c227aeef57ce1883fc17bc9f9e29eca2/src/Utils/Strings.php#L42
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*/
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$this->_do_query( $query );
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if ( $this->last_error ) {
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// Clear insert_id on a subsequent failed insert.
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if ( $this->insert_id && preg_match( '/^\s*(insert|replace)\s/i', $query ) ) {
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$this->insert_id = 0;
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}
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$this->print_error();
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return false;
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}
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if ( preg_match( '/^\s*(create|alter|truncate|drop)\s/i', $query ) ) {
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$return_val = true;
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} elseif ( preg_match( '/^\s*(insert|delete|update|replace)\s/i', $query ) ) {
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$this->rows_affected = $this->dbh->get_last_return_value();
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// Take note of the insert_id.
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if ( preg_match( '/^\s*(insert|replace)\s/i', $query ) ) {
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$this->insert_id = $this->dbh->get_insert_id();
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}
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// Return number of rows affected.
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$return_val = $this->rows_affected;
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} else {
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$num_rows = 0;
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if ( is_array( $this->result ) ) {
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$this->last_result = $this->result;
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$num_rows = count( $this->result );
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}
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// Log and return the number of rows selected.
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$this->num_rows = $num_rows;
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$return_val = $num_rows;
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}
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// Query monitor integration:
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if ( $query_monitor_active && class_exists( 'QM_Backtrace' ) ) {
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if ( did_action( 'qm/cease' ) ) {
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$this->queries = array();
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}
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$i = $last_query_count;
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if ( ! isset( $this->queries[ $i ] ) ) {
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return $return_val;
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}
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$this->queries[ $i ]['trace'] = new QM_Backtrace();
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if ( ! isset( $this->queries[ $i ][3] ) ) {
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$this->queries[ $i ][3] = $this->time_start;
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}
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if ( $this->last_error && ! $this->suppress_errors ) {
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$this->queries[ $i ]['result'] = new WP_Error( 'qmdb', $this->last_error );
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} else {
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$this->queries[ $i ]['result'] = (int) $return_val;
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}
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// Add SQLite query data.
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$this->queries[ $i ]['sqlite_queries'] = $this->dbh->get_last_sqlite_queries();
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}
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return $return_val;
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}
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/**
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* Internal function to perform the SQLite query call.
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*
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* This closely mirrors wpdb::_do_query().
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*
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* @see wpdb::_do_query()
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*
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* @param string $query The query to run.
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*/
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private function _do_query( $query ) {
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if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES ) {
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$this->timer_start();
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}
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try {
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$this->result = $this->dbh->query( $query );
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} catch ( Throwable $e ) {
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$this->last_error = $this->format_error_message( $e );
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}
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++$this->num_queries;
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if ( defined( 'SAVEQUERIES' ) && SAVEQUERIES ) {
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$this->log_query(
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$query,
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$this->timer_stop(),
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$this->get_caller(),
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$this->time_start,
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array()
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);
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}
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}
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/**
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* Method to set the class variable $col_info.
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*
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* This overrides wpdb::load_col_info(), which uses a mysql function.
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*
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* @see wpdb::load_col_info()
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*/
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protected function load_col_info() {
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if ( $this->col_info ) {
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return;
|
|
}
|
|
$this->col_info = array();
|
|
foreach ( $this->dbh->get_last_column_meta() as $column ) {
|
|
$this->col_info[] = (object) array(
|
|
'name' => $column['name'],
|
|
'orgname' => $column['mysqli:orgname'],
|
|
'table' => $column['table'],
|
|
'orgtable' => $column['mysqli:orgtable'],
|
|
'def' => '', // Unused, always ''.
|
|
'db' => $column['mysqli:db'],
|
|
'catalog' => 'def', // Unused, always 'def'.
|
|
'max_length' => 0, // As of PHP 8.1, this is always 0.
|
|
'length' => $column['len'],
|
|
'charsetnr' => $column['mysqli:charsetnr'],
|
|
'flags' => $column['mysqli:flags'],
|
|
'type' => $column['mysqli:type'],
|
|
'decimals' => $column['precision'],
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Method to return what the database can do.
|
|
*
|
|
* This overrides wpdb::has_cap() to avoid using MySQL functions.
|
|
* SQLite supports subqueries, but not support collation, group_concat and set_charset.
|
|
*
|
|
* @see wpdb::has_cap()
|
|
*
|
|
* @param string $db_cap The feature to check for. Accepts 'collation',
|
|
* 'group_concat', 'subqueries', 'set_charset',
|
|
* 'utf8mb4', or 'utf8mb4_520'.
|
|
*
|
|
* @return bool Whether the database feature is supported, false otherwise.
|
|
*/
|
|
public function has_cap( $db_cap ) {
|
|
return 'subqueries' === strtolower( $db_cap );
|
|
}
|
|
|
|
/**
|
|
* Method to return database version number.
|
|
*
|
|
* This overrides wpdb::db_version() to avoid using MySQL function.
|
|
* It returns mysql version number, but it means nothing for SQLite.
|
|
* So it return the newest mysql version.
|
|
*
|
|
* @see wpdb::db_version()
|
|
*/
|
|
public function db_version() {
|
|
return '8.0';
|
|
}
|
|
|
|
/**
|
|
* Returns the version of the SQLite engine.
|
|
*
|
|
* @return string SQLite engine version as a string.
|
|
*/
|
|
public function db_server_info() {
|
|
return $this->dbh->get_sqlite_version();
|
|
}
|
|
|
|
/**
|
|
* Make sure the SQLite database directory exists and is writable.
|
|
* Create .htaccess and index.php files to prevent direct access.
|
|
*
|
|
* @param string $database_path The path to the SQLite database file.
|
|
*/
|
|
private function ensure_database_directory( string $database_path ) {
|
|
$dir = dirname( $database_path );
|
|
|
|
// Set the umask to 0000 to apply permissions exactly as specified.
|
|
// A non-zero umask affects new file and directory permissions.
|
|
$umask = umask( 0 );
|
|
|
|
// Ensure database directory.
|
|
if ( ! is_dir( $dir ) ) {
|
|
if ( ! @mkdir( $dir, 0700, true ) ) {
|
|
wp_die( sprintf( 'Failed to create database directory: %s', $dir ), 'Error!' );
|
|
}
|
|
}
|
|
if ( ! is_writable( $dir ) ) {
|
|
wp_die( sprintf( 'Database directory is not writable: %s', $dir ), 'Error!' );
|
|
}
|
|
|
|
// Ensure .htaccess file to prevent direct access.
|
|
$path = $dir . DIRECTORY_SEPARATOR . '.htaccess';
|
|
if ( ! is_file( $path ) ) {
|
|
$result = file_put_contents( $path, 'DENY FROM ALL', LOCK_EX );
|
|
if ( false === $result ) {
|
|
wp_die( sprintf( 'Failed to create file: %s', $path ), 'Error!' );
|
|
}
|
|
chmod( $path, 0600 );
|
|
}
|
|
|
|
// Ensure index.php file to prevent direct access.
|
|
$path = $dir . DIRECTORY_SEPARATOR . 'index.php';
|
|
if ( ! is_file( $path ) ) {
|
|
$result = file_put_contents( $path, '<?php // Silence is gold. ?>', LOCK_EX );
|
|
if ( false === $result ) {
|
|
wp_die( sprintf( 'Failed to create file: %s', $path ), 'Error!' );
|
|
}
|
|
chmod( $path, 0600 );
|
|
}
|
|
|
|
// Restore the original umask value.
|
|
umask( $umask );
|
|
}
|
|
|
|
|
|
/**
|
|
* Format SQLite driver error message.
|
|
*
|
|
* @return string
|
|
*/
|
|
private function format_error_message( Throwable $e ) {
|
|
$output = '<div style="clear:both"> </div>' . PHP_EOL;
|
|
|
|
// Queries.
|
|
if ( $e instanceof WP_SQLite_Driver_Exception ) {
|
|
$driver = $e->getDriver();
|
|
|
|
$output .= '<div class="queries" style="clear:both;margin-bottom:2px;border:red dotted thin;">' . PHP_EOL;
|
|
$output .= '<p>MySQL query:</p>' . PHP_EOL;
|
|
$output .= '<p>' . $driver->get_last_mysql_query() . '</p>' . PHP_EOL;
|
|
$output .= '<p>Queries made or created this session were:</p>' . PHP_EOL;
|
|
$output .= '<ol>' . PHP_EOL;
|
|
foreach ( $driver->get_last_sqlite_queries() as $q ) {
|
|
$message = "Executing: {$q['sql']} | " . ( $q['params'] ? 'parameters: ' . implode( ', ', $q['params'] ) : '(no parameters)' );
|
|
$output .= '<li>' . htmlspecialchars( $message ) . '</li>' . PHP_EOL;
|
|
}
|
|
$output .= '</ol>' . PHP_EOL;
|
|
$output .= '</div>' . PHP_EOL;
|
|
}
|
|
|
|
// Message.
|
|
$output .= '<div style="clear:both;margin-bottom:2px;border:red dotted thin;" class="error_message" style="border-bottom:dotted blue thin;">' . PHP_EOL;
|
|
$output .= $e->getMessage() . PHP_EOL;
|
|
$output .= '</div>' . PHP_EOL;
|
|
|
|
// Backtrace.
|
|
$output .= '<p>Backtrace:</p>' . PHP_EOL;
|
|
$output .= '<pre>' . $e->getTraceAsString() . '</pre>' . PHP_EOL;
|
|
return $output;
|
|
}
|
|
}
|