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class-search-replace.php
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<?php if (!defined('UPDRAFTPLUS_DIR')) die('No direct access allowed'); class UpdraftPlus_Search_Replace { private $known_incomplete_classes = array(); private $columns = array(); private $current_row = 0; private $use_wpdb = false; private $use_mysqli = false; private $wpdb_obj = null; private $mysql_dbh = null; protected $max_recursion = 0; /** * Constructor */ public function __construct() { add_action('updraftplus_restore_db_pre', array($this, 'updraftplus_restore_db_pre')); $this->max_recursion = apply_filters('updraftplus_search_replace_max_recursion', 10); } /** * This function is called via the filter updraftplus_restore_db_pre it sets up the search and replace database objects * * @return void */ public function updraftplus_restore_db_pre() { global $wpdb, $updraftplus_restorer; $this->use_wpdb = $updraftplus_restorer->use_wpdb(); $this->wpdb_obj = $wpdb; $mysql_dbh = false; $use_mysqli = false; if (!$this->use_wpdb) { // We have our own extension which drops lots of the overhead on the query $wpdb_obj = $updraftplus_restorer->get_db_object(); // Was that successful? if (!$wpdb_obj->is_mysql || !$wpdb_obj->ready) { $this->use_wpdb = true; } else { $this->wpdb_obj = $wpdb_obj; $mysql_dbh = $wpdb_obj->updraftplus_get_database_handle(); $use_mysqli = $wpdb_obj->updraftplus_use_mysqli(); } } $this->mysql_dbh = $mysql_dbh; $this->use_mysqli = $use_mysqli; } /** * The engine * * @param string|array $search - a string or array of things to search for * @param string|array $replace - a string or array of things to replace the search terms with * @param array $tables - an array of tables * @param integer $page_size - the page size */ public function icit_srdb_replacer($search, $replace, $tables, $page_size) { if (!is_array($tables)) return false; global $wpdb, $updraftplus; $report = array( 'tables' => 0, 'rows' => 0, 'change' => 0, 'updates' => 0, 'start' => microtime(true), 'end' => microtime(true), 'errors' => array(), ); $page_size = (empty($page_size) || !is_numeric($page_size)) ? 5000 : $page_size; foreach ($tables as $table => $stripped_table) { $report['tables']++; if ($search === $replace) { $updraftplus->log("No search/replace required: would-be search and replacement are identical"); continue; } $this->columns = array(); $print_line = __('Search and replacing table:', 'updraftplus').' '.$table; $updraftplus->check_db_connection($this->wpdb_obj, true); // Get a list of columns in this table $fields = $wpdb->get_results('DESCRIBE '.UpdraftPlus_Manipulation_Functions::backquote($table), ARRAY_A); $prikey_field = false; foreach ($fields as $column) { $primary_key = ('PRI' == $column['Key']) ? true : false; if ($primary_key) $prikey_field = $column['Field']; if ('posts' == $stripped_table && 'guid' == $column['Field']) { $updraftplus->log('Skipping search/replace on GUID column in posts table'); continue; } $this->columns[$column['Field']] = $primary_key; } // Count the number of rows we have in the table if large we'll split into blocks, This is a mod from Simon Wheatley // InnoDB does not do count(*) quickly. You can use an index for more speed - see: http://www.cloudspace.com/blog/2009/08/06/fast-mysql-innodb-count-really-fast/ $where = ''; // Opportunity to use internal knowledge on tables which may be huge if ('postmeta' == $stripped_table && ((is_array($search) && 0 === strpos($search[0], 'http')) || (is_string($search) && 0 === strpos($search, 'http')))) { $where = " WHERE meta_value LIKE '%http%'"; } $count_rows_sql = 'SELECT COUNT(*) FROM '.$table; if ($prikey_field) $count_rows_sql .= " USE INDEX (PRIMARY)"; $count_rows_sql .= $where; $row_countr = $wpdb->get_results($count_rows_sql, ARRAY_N); // If that failed, try this if (false !== $prikey_field && $wpdb->last_error) { $row_countr = $wpdb->get_results("SELECT COUNT(*) FROM $table USE INDEX ($prikey_field)".$where, ARRAY_N); if ($wpdb->last_error) $row_countr = $wpdb->get_results("SELECT COUNT(*) FROM $table", ARRAY_N); } $row_count = $row_countr[0][0]; $print_line .= ': '.sprintf(__('rows: %d', 'updraftplus'), $row_count); $updraftplus->log($print_line, 'notice-restore', 'restoring-table-'.$table); $updraftplus->log('Search and replacing table: '.$table.": rows: ".$row_count); if (0 == $row_count) continue; for ($on_row = 0; $on_row <= $row_count; $on_row = $on_row+$page_size) { $this->current_row = 0; if ($on_row>0) $updraftplus->log_e("Searching and replacing reached row: %d", $on_row); // Grab the contents of the table list($data, $page_size) = $this->fetch_sql_result($table, $on_row, $page_size, $where); // $sql_line is calculated here only for the purpose of logging errors // $where might contain a %, so don't place it inside the main parameter $sql_line = sprintf('SELECT * FROM %s LIMIT %d, %d', $table.$where, $on_row, $on_row+$page_size); // Our strategy here is to minimise memory usage if possible; to process one row at a time if we can, rather than reading everything into memory if ($this->use_wpdb) { if ($wpdb->last_error) { $report['errors'][] = $this->print_error($sql_line); } else { foreach ($data as $row) { $rowrep = $this->process_row($table, $row, $search, $replace, $stripped_table); $report['rows']++; $report['updates'] += $rowrep['updates']; $report['change'] += $rowrep['change']; foreach ($rowrep['errors'] as $err) $report['errors'][] = $err; } } } else { if (false === $data) { $report['errors'][] = $this->print_error($sql_line); } elseif (true !== $data && null !== $data) { if ($this->use_mysqli) { while ($row = mysqli_fetch_array($data)) { $rowrep = $this->process_row($table, $row, $search, $replace, $stripped_table); $report['rows']++; $report['updates'] += $rowrep['updates']; $report['change'] += $rowrep['change']; foreach ($rowrep['errors'] as $err) $report['errors'][] = $err; } mysqli_free_result($data); } else { // phpcs:ignore PHPCompatibility.Extensions.RemovedExtensions.mysql_DeprecatedRemoved while ($row = mysql_fetch_array($data)) { $rowrep = $this->process_row($table, $row, $search, $replace, $stripped_table); $report['rows']++; $report['updates'] += $rowrep['updates']; $report['change'] += $rowrep['change']; foreach ($rowrep['errors'] as $err) $report['errors'][] = $err; } // phpcs:ignore PHPCompatibility.Extensions.RemovedExtensions.mysql_DeprecatedRemoved @mysql_free_result($data); } } } } } $report['end'] = microtime(true); return $report; } /** * This function will get data from the passed in table ready to be search and replaced * * @param string $table - the table name * @param integer $on_row - the row to start from * @param integer $page_size - the page size * @param string $where - the where condition * * @return array - an array of data or an array with a false value */ private function fetch_sql_result($table, $on_row, $page_size, $where = '') { $sql_line = sprintf('SELECT * FROM %s%s LIMIT %d, %d', $table, $where, $on_row, $page_size); global $updraftplus; $updraftplus->check_db_connection($this->wpdb_obj, true); if ($this->use_wpdb) { global $wpdb; $data = $wpdb->get_results($sql_line, ARRAY_A); if (!$wpdb->last_error) return array($data, $page_size); } else { if ($this->use_mysqli) { $data = mysqli_query($this->mysql_dbh, $sql_line); } else { // phpcs:ignore PHPCompatibility.Extensions.RemovedExtensions.mysql_DeprecatedRemoved $data = mysql_query($sql_line, $this->mysql_dbh); } if (false !== $data) return array($data, $page_size); } if (5000 <= $page_size) return $this->fetch_sql_result($table, $on_row, 2000, $where); if (2000 <= $page_size) return $this->fetch_sql_result($table, $on_row, 500, $where); // At this point, $page_size should be 500; and that failed return array(false, $page_size); } /** * This function will process a single row from the database calling recursive_unserialize_replace to search and replace the data found in the search and replace arrays * * @param string $table - the current table we are working on * @param array $row - the current row we are working on * @param array $search - an array of things to search for * @param array $replace - an array of things to replace the search terms with * @param string $stripped_table - the stripped table * * @return array - returns an array report which includes changes made and any errors */ private function process_row($table, $row, $search, $replace, $stripped_table) { global $updraftplus, $wpdb, $updraftplus_restorer; $report = array('change' => 0, 'errors' => array(), 'updates' => 0); $this->current_row++; $update_sql = array(); $where_sql = array(); $upd = false; foreach ($this->columns as $column => $primary_key) { // Don't search/replace these if (('options' == $stripped_table && 'option_value' == $column && !empty($row['option_name']) && 'updraft_remotesites' == $row['option_name']) || ('sitemeta' == $stripped_table && 'meta_value' == $column && !empty($row['meta_key']) && 'updraftplus_options' == $row['meta_key'])) { continue; } $edited_data = $data_to_fix = $row[$column]; $successful = false; // We catch errors/exceptions so that they're not fatal. Once saw a fatal ("Cannot access empty property") on "if (is_a($value, '__PHP_Incomplete_Class')) {" (not clear what $value has to be to cause that). try { // Run a search replace on the data that'll respect the serialisation. $edited_data = $this->recursive_unserialize_replace($search, $replace, $data_to_fix); $successful = true; } catch (Exception $e) { $log_message = 'An Exception ('.get_class($e).') occurred during the recursive search/replace. Exception message: '.$e->getMessage().' (Code: '.$e->getCode().', line '.$e->getLine().' in '.$e->getFile().')'; $report['errors'][] = $log_message; error_log($log_message); $updraftplus->log($log_message); $updraftplus->log(sprintf(__('A PHP exception (%s) has occurred: %s', 'updraftplus'), get_class($e), $e->getMessage()), 'warning-restore'); // @codingStandardsIgnoreLine } catch (Error $e) { $log_message = 'A PHP Fatal error (recoverable, '.get_class($e).') occurred during the recursive search/replace. Exception message: Error message: '.$e->getMessage().' (Code: '.$e->getCode().', line '.$e->getLine().' in '.$e->getFile().')'; $report['errors'][] = $log_message; error_log($log_message); $updraftplus->log($log_message); $updraftplus->log(sprintf(__('A PHP fatal error (%s) has occurred: %s', 'updraftplus'), get_class($e), $e->getMessage()), 'warning-restore'); } // Something was changed if ($successful && $edited_data != $data_to_fix) { $report['change']++; $ed = $edited_data; $wpdb->escape_by_ref($ed); // Undo breakage introduced in WP 4.8.3 core if (is_callable(array($wpdb, 'remove_placeholder_escape'))) $ed = $wpdb->remove_placeholder_escape($ed); $update_sql[] = UpdraftPlus_Manipulation_Functions::backquote($column) . ' = "' . $ed . '"'; $upd = true; } if ($primary_key) { $df = $data_to_fix; $wpdb->escape_by_ref($df); // Undo breakage introduced in WP 4.8.3 core if (is_callable(array($wpdb, 'remove_placeholder_escape'))) $df = $wpdb->remove_placeholder_escape($df); $where_sql[] = UpdraftPlus_Manipulation_Functions::backquote($column) . ' = "' . $df . '"'; } } if ($upd && !empty($where_sql)) { $sql = 'UPDATE '.UpdraftPlus_Manipulation_Functions::backquote($table).' SET '.implode(', ', $update_sql).' WHERE '.implode(' AND ', array_filter($where_sql)); $result = $updraftplus_restorer->sql_exec($sql, 5, '', false); if (false === $result || is_wp_error($result)) { $last_error = $this->print_error($sql); $report['errors'][] = $last_error; } else { $report['updates']++; } } elseif ($upd) { $report['errors'][] = sprintf('"%s" has no primary key, manual change needed on row %s.', $table, $this->current_row); $updraftplus->log(__('Error:', 'updraftplus').' '.sprintf(__('"%s" has no primary key, manual change needed on row %s.', 'updraftplus'), $table, $this->current_row), 'warning-restore'); } return $report; } /** * Inspect incomplete class object and make a note in the restoration log if it is a new class * * @param object $data Object expected to be of __PHP_Incomplete_Class_Name */ private function unserialize_log_incomplete_class($data) { global $updraftplus; try { $patch_object = new ArrayObject($data); $class_name = $patch_object['__PHP_Incomplete_Class_Name']; } catch (Exception $e) { error_log('unserialize_log_incomplete_class: '.$e->getMessage()); // @codingStandardsIgnoreLine } catch (Error $e) { error_log('unserialize_log_incomplete_class: '.$e->getMessage()); } // Check if this class is known // Have to serialize incomplete class to find original class name if (!in_array($class_name, $this->known_incomplete_classes)) { $this->known_incomplete_classes[] = $class_name; $updraftplus->log('Incomplete object detected in database: '.$class_name.'; Search and replace will be skipped for these entries'); } } /** * Take a serialised array and unserialise it replacing elements as needed and * unserialising any subordinate arrays and performing the replace on those too. * N.B. $from and $to can be arrays - they get passed only to str_replace(), which can take an array * * @param string $from String we're looking to replace. * @param string $to What we want it to be replaced with * @param array $data Used to pass any subordinate arrays back to in. * @param bool $serialised Does the array passed via $data need serialising. * @param int $recursion_level Current recursion depth within the original data. * @param array $visited_data Data that has been seen in previous recursion iterations. * * @return array The original array with all elements replaced as needed. */ private function recursive_unserialize_replace($from = '', $to = '', $data = '', $serialised = false, $recursion_level = 0, $visited_data = array()) { global $updraftplus; static $error_count = 0; // some unserialised data cannot be re-serialised eg. SimpleXMLElements try { $case_insensitive = false; // If we've reached the maximum recursion level, short circuit if (0 !== $this->max_recursion && $recursion_level >= $this->max_recursion) { return $data; } if (is_array ($data) || is_object($data)) { // If we've seen this exact object or array before, short circuit if (in_array($data, $visited_data, true)) { return $data; // Avoid infinite recursions when there's a circular reference } // Add this data to the list of $visited_data[] = $data; } if (is_array($from) && is_array($to)) { $case_insensitive = preg_match('#^https?:#i', implode($from)) && preg_match('#^https?:#i', implode($to)) ? true : false; } else { $case_insensitive = preg_match('#^https?:#i', $from) && preg_match('#^https?:#i', $to) ? true : false; } // O:8:"DateTime":0:{} : see https://bugs.php.net/bug.php?id=62852 if (is_serialized($data) && false === strpos($data, 'O:8:"DateTime":0:{}') && false !== ($unserialized = @unserialize($data))) {// phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged $data = $this->recursive_unserialize_replace($from, $to, $unserialized, true, $recursion_level + 1); } elseif (is_array($data)) { $_tmp = array(); foreach ($data as $key => $value) { // Check that we aren't attempting search/replace on an incomplete class // We assume that if $data is an __PHP_Incomplete_Class, it is extremely likely that the original did not contain the domain if (is_a($value, '__PHP_Incomplete_Class')) { // Check if this class is known $this->unserialize_log_incomplete_class($value); // return original data $_tmp[$key] = $value; } else { $_tmp[$key] = $this->recursive_unserialize_replace($from, $to, $value, false, $recursion_level + 1, $visited_data); } } $data = $_tmp; unset($_tmp); } elseif (is_object($data)) { $_tmp = $data; // new $data_class(); // Check that we aren't attempting search/replace on an incomplete class // We assume that if $data is an __PHP_Incomplete_Class, it is extremely likely that the original did not contain the domain if (is_a($data, '__PHP_Incomplete_Class')) { // Check if this class is known $this->unserialize_log_incomplete_class($data); } else { $props = get_object_vars($data); foreach ($props as $key => $value) { $_tmp->$key = $this->recursive_unserialize_replace($from, $to, $value, false, $recursion_level + 1, $visited_data); } } $data = $_tmp; unset($_tmp); } elseif (is_string($data) && (null !== ($_tmp = json_decode($data, true)))) { if (is_array($_tmp)) { foreach ($_tmp as $key => $value) { // Check that we aren't attempting search/replace on an incomplete class // We assume that if $data is an __PHP_Incomplete_Class, it is extremely likely that the original did not contain the domain if (is_a($value, '__PHP_Incomplete_Class')) { // Check if this class is known $this->unserialize_log_incomplete_class($value); // return original data $_tmp[$key] = $value; } else { $_tmp[$key] = $this->recursive_unserialize_replace($from, $to, $value, false, $recursion_level + 1, $visited_data); } } $data = json_encode($_tmp); unset($_tmp); } } else { if (is_string($data)) { if ($case_insensitive) { $data = str_ireplace($from, $to, $data); } else { $data = str_replace($from, $to, $data); } // Below is the wrong approach. In fact, in the problematic case, the resolution is an extra search/replace to undo unnecessary ones // if (is_string($from)) { // $data = str_replace($from, $to, $data); // } else { // # Array. We only want a maximum of one replacement to take place. This is only an issue in non-default setups, but in those situations, carrying out all the search/replaces can be wrong. This is also why the most specific URL should be done first. // foreach ($from as $i => $f) { // $ndata = str_replace($f, $to[$i], $data); // if ($ndata != $data) { // $data = $ndata; // break; // } // } // } } } if ($serialised) return serialize($data); } catch (Exception $error) { if (3 > $error_count) { $log_message = 'PHP Fatal Exception error ('.get_class($error).') has occurred during recursive_unserialize_replace. Error Message: '.$error->getMessage().' (Code: '.$error->getCode().', line '.$error->getLine().' in '.$error->getFile().')'; $updraftplus->log($log_message, 'warning-restore'); $error_count++; } } return $data; } /** * This function will get the last database error and log it * * @param string $sql_line - the sql line that caused the error * * @return void */ public function print_error($sql_line) { global $wpdb, $updraftplus; if ($this->use_wpdb) { $last_error = $wpdb->last_error; } else { // phpcs:ignore PHPCompatibility.Extensions.RemovedExtensions.mysql_DeprecatedRemoved $last_error = ($this->use_mysqli) ? mysqli_error($this->mysql_dbh) : mysql_error($this->mysql_dbh); } $updraftplus->log(__('Error:', 'updraftplus')." ".$last_error." - ".__('the database query being run was:', 'updraftplus').' '.$sql_line, 'warning-restore'); return $last_error; } }
/home/sudancam/public_html/0d544/../../.trash/updraftplus/includes/../includes/./class-search-replace.php