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734 lines
25 KiB
734 lines
25 KiB
<?php
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/**
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*
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* @package Duplicator
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* @copyright (c) 2022, Snap Creek LLC
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*/
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namespace Duplicator\Libs\Snap;
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use Exception;
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use mysqli;
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use mysqli_result;
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class SnapDB
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{
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const CONN_MYSQL = 'mysql';
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const CONN_MYSQLI = 'mysqli';
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const CACHE_PREFIX_PRIMARY_KEY_COLUMN = 'pkcol_';
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const DB_ENGINE_MYSQL = 'MySQL';
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const DB_ENGINE_MARIA = 'MariaDB';
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const DB_ENGINE_PERCONA = 'Percona';
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/** @var array<string, mixed> */
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private static $cache = array();
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/**
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* Return array if primary key is composite key
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*
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* @param mysqli|resource $dbh database connection
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* @param string $tableName table name
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* @param null|callable $logCallback log callback
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*
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* @return false|string|string[] return unique index column ky or false if don't exists
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*/
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public static function getUniqueIndexColumn($dbh, $tableName, $logCallback = null)
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{
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$cacheKey = self::CACHE_PREFIX_PRIMARY_KEY_COLUMN . $tableName;
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if (!isset(self::$cache[$cacheKey])) {
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$query = 'SHOW COLUMNS FROM `' . self::realEscapeString($dbh, $tableName) . '` WHERE `Key` IN ("PRI","UNI")';
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if (($result = self::query($dbh, $query)) === false) {
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if (is_callable($logCallback)) {
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call_user_func($logCallback, $dbh, $result, $query);
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}
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throw new \Exception('SHOW KEYS QUERY ERROR: ' . self::error($dbh));
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}
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if (is_callable($logCallback)) {
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call_user_func($logCallback, $dbh, $result, $query);
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}
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if (self::numRows($result) == 0) {
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self::$cache[$cacheKey] = false;
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} else {
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$primary = false;
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$excludePrimary = false;
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$unique = false;
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while ($row = self::fetchAssoc($result)) {
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switch ($row['Key']) {
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case 'PRI':
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if ($primary === false) {
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$primary = $row['Field'];
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} else {
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if (is_scalar($primary)) {
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$primary = array($primary);
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}
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$primary[] = $row['Field'];
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}
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if (preg_match('/^(?:var)?binary/i', $row['Type'])) {
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// exclude binary or varbynary columns
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$excludePrimary = true;
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}
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break;
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case 'UNI':
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if (!preg_match('/^(?:var)?binary/i', $row['Type'])) {
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// exclude binary or varbynary columns
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$unique = $row['Field'];
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}
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break;
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default:
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break;
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}
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}
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if ($primary !== false && $excludePrimary === false) {
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self::$cache[$cacheKey] = $primary;
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} elseif ($unique !== false) {
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self::$cache[$cacheKey] = $unique;
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} else {
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self::$cache[$cacheKey] = false;
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}
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}
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self::freeResult($result);
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}
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return self::$cache[$cacheKey];
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}
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/**
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* Escape the regex for mysql queries, the mysqli_real_escape must be applied anyway to the generated string
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*
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* @param string $regex Regex
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*
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* @return string Escaped regex
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*/
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public static function quoteRegex($regex)
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{
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// preg_quote takes a string and escapes special characters with a backslash.
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// It is meant for PHP regexes, not MySQL regexes, and it does not escape &,
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// which is needed for MySQL. So we only need to modify it like so:
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// https://stackoverflow.com/questions/3782379/whats-the-best-way-to-escape-user-input-for-regular-expressions-in-mysql
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return preg_replace('/&/', '\\&', preg_quote($regex, null /* no delimiter */));
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}
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/**
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* Returns the offset from the current row
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*
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* @param mixed[] $row current database row
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* @param int|string|string[] $indexColumns columns of the row that generated the index offset
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* @param mixed $lastOffset last offset
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*
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* @return mixed
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*/
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public static function getOffsetFromRowAssoc($row, $indexColumns, $lastOffset)
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{
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if (is_array($indexColumns)) {
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$result = array();
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foreach ($indexColumns as $col) {
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$result[$col] = isset($row[$col]) ? $row[$col] : 0;
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}
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return $result;
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} elseif (strlen($indexColumns) > 0) {
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return isset($row[$indexColumns]) ? $row[$indexColumns] : 0;
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} else {
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if (is_scalar($lastOffset)) {
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return $lastOffset + 1;
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} else {
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return $lastOffset;
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}
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}
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}
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/**
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* This function performs a select by structuring the primary key as offset if the table has a primary key.
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* For optimization issues, no checks are performed on the input query and it is assumed that the select has at least a where value.
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* If there are no conditions, you still have to perform an always true condition, for example
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* SELECT * FROM `copy1_postmeta` WHERE 1
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*
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* @param mysqli|resource $dbh database connection
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* @param string $query query string
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* @param string $table table name
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* @param int $offset row offset
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* @param int $limit limit of query, 0 no limit
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* @param mixed $lastRowOffset last offset to use on next function call
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* @param null|callable $logCallback log callback
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*
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* @return mysqli_result
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*/
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public static function selectUsingPrimaryKeyAsOffset($dbh, $query, $table, $offset, $limit, &$lastRowOffset = null, $logCallback = null)
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{
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$where = '';
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$orderby = '';
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$offsetStr = '';
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$limitStr = $limit > 0 ? ' LIMIT ' . $limit : '';
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if (($primaryColumn = self::getUniqueIndexColumn($dbh, $table, $logCallback)) == false) {
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$offsetStr = ' OFFSET ' . (is_scalar($offset) ? $offset : 0);
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} else {
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if (is_array($primaryColumn)) {
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// COMPOSITE KEY
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$orderByCols = array();
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foreach ($primaryColumn as $colIndex => $col) {
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$orderByCols[] = '`' . $col . '` ASC';
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}
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$orderby = ' ORDER BY ' . implode(',', $orderByCols);
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} else {
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$orderby = ' ORDER BY `' . $primaryColumn . '` ASC';
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}
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$where = self::getOffsetKeyCondition($dbh, $primaryColumn, $offset);
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}
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$query .= $where . $orderby . $limitStr . $offsetStr;
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if (($result = self::query($dbh, $query)) === false) {
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if (is_callable($logCallback)) {
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call_user_func($logCallback, $dbh, $result, $query);
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}
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throw new \Exception('SELECT ERROR: ' . self::error($dbh) . ' QUERY: ' . $query);
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}
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if (is_callable($logCallback)) {
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call_user_func($logCallback, $dbh, $result, $query);
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}
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if (self::dbConnTypeByResult($result) === self::CONN_MYSQLI) {
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if ($primaryColumn == false) {
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$lastRowOffset = $offset + $result->num_rows;
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} else {
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if ($result->num_rows == 0) {
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$lastRowOffset = $offset;
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} else {
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$result->data_seek(($result->num_rows - 1));
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$row = $result->fetch_assoc();
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if (is_array($primaryColumn)) {
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$lastRowOffset = array();
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foreach ($primaryColumn as $col) {
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$lastRowOffset[$col] = $row[$col];
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}
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} else {
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$lastRowOffset = $row[$primaryColumn];
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}
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$result->data_seek(0);
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}
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}
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} else {
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if ($primaryColumn == false) {
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$lastRowOffset = $offset + mysql_num_rows($result); // @phpstan-ignore-line
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} else {
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if (mysql_num_rows($result) == 0) { // @phpstan-ignore-line
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$lastRowOffset = $offset;
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} else {
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mysql_data_seek($result, (mysql_num_rows($result) - 1)); // @phpstan-ignore-line
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$row = mysql_fetch_assoc($result); // @phpstan-ignore-line
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if (is_array($primaryColumn)) {
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$lastRowOffset = array();
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foreach ($primaryColumn as $col) {
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$lastRowOffset[$col] = $row[$col];
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}
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} else {
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$lastRowOffset = $row[$primaryColumn];
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}
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mysql_data_seek($result, 0); // @phpstan-ignore-line
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}
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}
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}
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return $result;
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}
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/**
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* Depending on the structure type of the primary key returns the condition to position at the right offset
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*
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* @param mysqli|resource $dbh database connection
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* @param string|string[] $primaryColumn primaricolumng index
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* @param mixed $offset offset
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*
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* @return string
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*/
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protected static function getOffsetKeyCondition($dbh, $primaryColumn, $offset)
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{
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$condition = '';
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if ($offset === 0) {
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return '';
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}
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// COUPOUND KEY
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if (is_array($primaryColumn)) {
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$isFirstCond = true;
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foreach ($primaryColumn as $colIndex => $col) {
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if (is_array($offset) && isset($offset[$col])) {
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if ($isFirstCond) {
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$isFirstCond = false;
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} else {
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$condition .= ' OR ';
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}
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$condition .= ' (';
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for ($prevColIndex = 0; $prevColIndex < $colIndex; $prevColIndex++) {
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$condition .=
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' `' . $primaryColumn[$prevColIndex] . '` = "' .
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self::realEscapeString($dbh, $offset[$primaryColumn[$prevColIndex]]) . '" AND ';
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}
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$condition .= ' `' . $col . '` > "' . self::realEscapeString($dbh, $offset[$col]) . '")';
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}
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}
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} else {
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$condition = '`' . $primaryColumn . '` > "' . self::realEscapeString($dbh, (is_scalar($offset) ? $offset : 0)) . '"';
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}
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return (strlen($condition) ? ' AND (' . $condition . ')' : '');
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}
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/**
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* get current database engine (mysql, maria, percona)
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*
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* @param mysqli|resource $dbh database connection
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*
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* @return string
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*/
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public static function getDBEngine($dbh)
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{
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if (($result = self::query($dbh, "SHOW VARIABLES LIKE 'version%'")) === false) {
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// on query error assume is mysql.
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return self::DB_ENGINE_MYSQL;
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}
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$rows = array();
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while ($row = self::fetchRow($result)) {
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$rows[] = $row;
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}
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self::freeResult($result);
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$version = isset($rows[0][1]) ? $rows[0][1] : false;
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$versionComment = isset($rows[1][1]) ? $rows[1][1] : false;
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//Default is mysql
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if ($version === false && $versionComment === false) {
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return self::DB_ENGINE_MYSQL;
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}
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if (stripos($version, 'maria') !== false || stripos($versionComment, 'maria') !== false) {
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return self::DB_ENGINE_MARIA;
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}
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if (stripos($version, 'percona') !== false || stripos($versionComment, 'percona') !== false) {
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return self::DB_ENGINE_PERCONA;
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}
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return self::DB_ENGINE_MYSQL;
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}
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/**
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* Escape string
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*
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* @param resource|mysqli $dbh database connection
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* @param string $string string to escape
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*
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* @return string Returns an escaped string.
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*/
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public static function realEscapeString($dbh, $string)
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{
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if (self::dbConnType($dbh) === self::CONN_MYSQLI) {
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return mysqli_real_escape_string($dbh, $string);
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} else {
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return mysql_real_escape_string($string, $dbh); // @phpstan-ignore-line
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}
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}
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/**
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*
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* @param resource|mysqli $dbh database connection
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* @param string $query query string
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*
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* @return mixed <p>Returns <b><code>FALSE</code></b> on failure. For successful <i>SELECT, SHOW, DESCRIBE</i> or
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* <i>EXPLAIN</i> queries <b>mysqli_query()</b> will return a mysqli_result object.
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* For other successful queries <b>mysqli_query()</b> will return <b><code>TRUE</code></b>.</p>
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*/
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public static function query($dbh, $query)
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{
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try {
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if (self::dbConnType($dbh) === self::CONN_MYSQLI) {
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return mysqli_query($dbh, $query);
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} else {
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return mysql_query($query, $dbh); // @phpstan-ignore-line
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}
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} catch (Exception $e) {
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return false;
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}
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}
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/**
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*
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* @param resource|mysqli_result $result query result
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*
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* @return int
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*/
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public static function numRows($result)
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{
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if (self::dbConnTypeByResult($result) === self::CONN_MYSQLI) {
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return $result->num_rows;
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} else {
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return mysql_num_rows($result); // @phpstan-ignore-line
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}
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}
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/**
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*
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* @param resource|mysqli_result $result query result
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*
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* @return string[]|null|false Returns an array of strings that corresponds to the fetched row. NULL if there are no more rows in result set
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*/
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public static function fetchRow($result)
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{
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if (self::dbConnTypeByResult($result) === self::CONN_MYSQLI) {
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return mysqli_fetch_row($result);
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} elseif (is_resource($result)) {
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return mysql_fetch_row($result); // @phpstan-ignore-line
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} else {
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return false;
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}
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}
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/**
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*
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* @param resource|mysqli_result $result query result
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*
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* @return string[]|null|false Returns an associative array of values representing the fetched row in the result set,
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* where each key in the array represents the name of one of the result set's
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* columns or null if there are no more rows in result set.
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*/
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public static function fetchAssoc($result)
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{
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if (self::dbConnTypeByResult($result) === self::CONN_MYSQLI) {
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return mysqli_fetch_assoc($result);
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} elseif (is_resource($result)) {
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return mysql_fetch_assoc($result); // @phpstan-ignore-line
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} else {
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return false;
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}
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}
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/**
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*
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* @param resource|mysqli_result $result query result
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*
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* @return boolean
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*/
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public static function freeResult($result)
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{
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if (self::dbConnTypeByResult($result) === self::CONN_MYSQLI) {
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$result->free();
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return true;
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} elseif (is_resource($result)) {
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return mysql_free_result($result); // @phpstan-ignore-line
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} else {
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$result = null;
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return true;
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}
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}
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/**
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*
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* @param resource|mysqli $dbh database connection
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*
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* @return string
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*/
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public static function error($dbh)
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{
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if (self::dbConnType($dbh) === self::CONN_MYSQLI) {
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if ($dbh instanceof mysqli) {
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return mysqli_error($dbh);
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} else {
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return 'Unable to retrieve the error message from MySQL';
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}
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} else {
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if (is_resource($dbh)) {
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return mysql_error($dbh); // @phpstan-ignore-line
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} else {
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return 'Unable to retrieve the error message from MySQL';
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}
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}
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}
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/**
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*
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* @param resource|mysqli $dbh database connection
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*
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* @return string // self::CONN_MYSQLI|self::CONN_MYSQL
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*/
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public static function dbConnType($dbh)
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{
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return (is_object($dbh) && get_class($dbh) == 'mysqli') ? self::CONN_MYSQLI : self::CONN_MYSQL;
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}
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/**
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*
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* @param resource|mysqli_result $result query resyult
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*
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* @return string Enum self::CONN_MYSQLI|self::CONN_MYSQL
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*/
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public static function dbConnTypeByResult($result)
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{
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return (is_object($result) && get_class($result) == 'mysqli_result') ? self::CONN_MYSQLI : self::CONN_MYSQL;
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}
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/**
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* This function takes in input the values of a multiple inster with this format
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* (v1, v2, v3 ...),(v1, v2, v3, ...),...
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* and returns a two dimensional array where each item is a row containing the list of values
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* [
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* [v1, v2, v3 ...],
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* [v1, v2, v3 ...],
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* ...
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* ]
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* The return values are not processed but are taken exactly as they are in the dump file.
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* So if they are escaped it remains unchanged
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*
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* @param string $query query values
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*
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* @return array<array<scalar>>
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*/
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|
public static function getValuesFromQueryInsert($query)
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{
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$result = array();
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$isItemOpen = false;
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$isStringOpen = false;
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$char = '';
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$pChar = '';
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$currentItem = array();
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$currentValue = '';
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for ($i = 0; $i < strlen($query); $i++) {
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$pChar = $char;
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$char = $query[$i];
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switch ($char) {
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case '(':
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if ($isItemOpen == false && !$isStringOpen) {
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$isItemOpen = true;
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continue 2;
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}
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break;
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case ')':
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if ($isItemOpen && !$isStringOpen) {
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$isItemOpen = false;
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$currentItem[] = trim($currentValue);
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$currentValue = '';
|
|
$result[] = $currentItem;
|
|
$currentItem = array();
|
|
continue 2;
|
|
}
|
|
break;
|
|
case '\'':
|
|
case '"':
|
|
if ($isStringOpen === false && $pChar !== '\\') {
|
|
$isStringOpen = $char;
|
|
} elseif ($isStringOpen === $char && $pChar !== '\\') {
|
|
$isStringOpen = false;
|
|
}
|
|
break;
|
|
case ',':
|
|
if ($isItemOpen == false) {
|
|
continue 2;
|
|
} elseif ($isStringOpen === false) {
|
|
$currentItem[] = trim($currentValue);
|
|
$currentValue = '';
|
|
continue 2;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if ($isItemOpen == false) {
|
|
continue;
|
|
}
|
|
|
|
$currentValue .= $char;
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* This is the inverse of getValuesFromQueryInsert, from an array of values it returns the valody of an insert query
|
|
*
|
|
* @param mixed[] $values rows values
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function getQueryInsertValuesFromArray(array $values)
|
|
{
|
|
|
|
return implode(
|
|
',',
|
|
array_map(
|
|
function ($rowVals) {
|
|
return '(' . implode(',', $rowVals) . ')';
|
|
},
|
|
$values
|
|
)
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Returns the content of a value resulting from getValuesFromQueryInsert in string
|
|
* Then remove the outer quotes and escape
|
|
* "value\"test" become value"test
|
|
*
|
|
* @param string $value value
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function parsedQueryValueToString($value)
|
|
{
|
|
$result = preg_replace('/^[\'"]?(.*?)[\'"]?$/s', '$1', $value);
|
|
return stripslashes($result);
|
|
}
|
|
|
|
/**
|
|
* Returns the content of a value resulting from getValuesFromQueryInsert in int
|
|
* Then remove the outer quotes and escape
|
|
* "100" become (int)100
|
|
*
|
|
* @param string $value value
|
|
*
|
|
* @return int
|
|
*/
|
|
public static function parsedQueryValueToInt($value)
|
|
{
|
|
return (int) preg_replace('/^[\'"]?(.*?)[\'"]?$/s', '$1', $value);
|
|
}
|
|
|
|
/**
|
|
* Return the list of mysqlrealconnect existing flags values from mask
|
|
*
|
|
* @see https://www.php.net/manual/en/mysqli.real-connect.php
|
|
*
|
|
* @param bool $returnStr if true return define string else values
|
|
* @param null|int[] $filter if not null only the values that exist and are contained in the array are returned
|
|
*
|
|
* @return int[]|string[]
|
|
*/
|
|
public static function getMysqlConnectFlagsList($returnStr = true, $filter = null)
|
|
{
|
|
static $flagsList = null;
|
|
|
|
if (is_null($flagsList)) {
|
|
$flagsList = array();
|
|
|
|
if (defined('MYSQLI_CLIENT_COMPRESS')) {
|
|
$flagsList[MYSQLI_CLIENT_COMPRESS] = 'MYSQLI_CLIENT_COMPRESS';
|
|
}
|
|
if (defined('MYSQLI_CLIENT_FOUND_ROWS')) {
|
|
$flagsList[MYSQLI_CLIENT_FOUND_ROWS] = 'MYSQLI_CLIENT_FOUND_ROWS';
|
|
}
|
|
if (defined('MYSQLI_CLIENT_IGNORE_SPACE')) {
|
|
$flagsList[MYSQLI_CLIENT_IGNORE_SPACE] = 'MYSQLI_CLIENT_IGNORE_SPACE';
|
|
}
|
|
if (defined('MYSQLI_CLIENT_INTERACTIVE')) {
|
|
$flagsList[MYSQLI_CLIENT_INTERACTIVE] = 'MYSQLI_CLIENT_INTERACTIVE';
|
|
}
|
|
if (defined('MYSQLI_CLIENT_SSL')) {
|
|
$flagsList[MYSQLI_CLIENT_SSL] = 'MYSQLI_CLIENT_SSL';
|
|
}
|
|
if (defined('MYSQLI_CLIENT_SSL_DONT_VERIFY_SERVER_CERT')) {
|
|
// phpcs:ignore PHPCompatibility.Constants.NewConstants.mysqli_client_ssl_dont_verify_server_certFound
|
|
$flagsList[MYSQLI_CLIENT_SSL_DONT_VERIFY_SERVER_CERT] = 'MYSQLI_CLIENT_SSL_DONT_VERIFY_SERVER_CERT';
|
|
}
|
|
}
|
|
|
|
if (is_null($filter)) {
|
|
$result = $flagsList;
|
|
} else {
|
|
$result = array();
|
|
foreach ($flagsList as $flagVal => $flag) {
|
|
if (!in_array($flagVal, $filter)) {
|
|
continue;
|
|
}
|
|
$result[$flagVal] = $flag;
|
|
}
|
|
}
|
|
|
|
if ($returnStr) {
|
|
return array_values($result);
|
|
} else {
|
|
return array_keys($result);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return the list of mysqlrealconnect flags values from mask
|
|
*
|
|
* @see https://www.php.net/manual/en/mysqli.real-connect.php
|
|
*
|
|
* @param int $value mask value
|
|
*
|
|
* @return int[]
|
|
*/
|
|
public static function getMysqlConnectFlagsFromMaskVal($value)
|
|
{
|
|
/*
|
|
MYSQLI_CLIENT_COMPRESS 32
|
|
MYSQLI_CLIENT_FOUND_ROWS 2
|
|
MYSQLI_CLIENT_IGNORE_SPACE 256
|
|
MYSQLI_CLIENT_INTERACTIVE 1024
|
|
MYSQLI_CLIENT_SSL 2048
|
|
MYSQLI_CLIENT_SSL_DONT_VERIFY_SERVER_CERT 64
|
|
*/
|
|
|
|
$result = array();
|
|
|
|
foreach (self::getMysqlConnectFlagsList(false) as $flagVal) {
|
|
if (($value & $flagVal) > 0) {
|
|
$result[] = $flagVal;
|
|
}
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Returns a list of redundant case insensitive duplicate tables
|
|
*
|
|
* @param string $prefix The WP table prefix
|
|
* @param string[] $duplicates List of case insensitive duplicate table names
|
|
*
|
|
* @return string[]
|
|
*/
|
|
public static function getRedundantDuplicateTables($prefix, $duplicates)
|
|
{
|
|
//core tables are not redundant, check with priority
|
|
foreach (SnapWP::getSiteCoreTables() as $coreTable) {
|
|
if (($k = array_search($prefix . $coreTable, $duplicates)) !== false) {
|
|
unset($duplicates[$k]);
|
|
return array_values($duplicates);
|
|
}
|
|
}
|
|
|
|
foreach ($duplicates as $i => $tableName) {
|
|
if (stripos($tableName, $prefix) === 0) {
|
|
//table has prefix, the case sensitive match is not redundant
|
|
if (strpos($tableName, $prefix) === 0) {
|
|
unset($duplicates[$i]);
|
|
break;
|
|
}
|
|
|
|
//no case sensitive match is present, first table is not redundant
|
|
if ($i === (count($duplicates) - 1)) {
|
|
unset($duplicates[0]);
|
|
break;
|
|
}
|
|
} else {
|
|
//no prefix present, first table not redundant
|
|
unset($duplicates[$i]);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return array_values($duplicates);
|
|
}
|
|
}
|
|
|