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| <?php | |
| /** | |
| * | |
| * This file is part of the phpBB Forum Software package. | |
| * | |
| * @copyright (c) phpBB Limited <https://www.phpbb.com> | |
| * @license GNU General Public License, version 2 (GPL-2.0) | |
| * | |
| * For full copyright and license information, please see | |
| * the docs/CREDITS.txt file. | |
| * | |
| */ | |
| namespace phpbb\db\extractor; | |
| use phpbb\db\extractor\exception\extractor_not_initialized_exception; | |
| class mysql_extractor extends base_extractor | |
| { | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function write_start($table_prefix) | |
| { | |
| if (!$this->is_initialized) | |
| { | |
| throw new extractor_not_initialized_exception(); | |
| } | |
| $sql_data = "#\n"; | |
| $sql_data .= "# phpBB Backup Script\n"; | |
| $sql_data .= "# Dump of tables for $table_prefix\n"; | |
| $sql_data .= "# DATE : " . gmdate("d-m-Y H:i:s", $this->time) . " GMT\n"; | |
| $sql_data .= "#\n"; | |
| $this->flush($sql_data); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function write_table($table_name) | |
| { | |
| static $new_extract; | |
| if (!$this->is_initialized) | |
| { | |
| throw new extractor_not_initialized_exception(); | |
| } | |
| if ($new_extract === null) | |
| { | |
| if ($this->db->get_sql_layer() === 'mysqli' || version_compare($this->db->sql_server_info(true), '3.23.20', '>=')) | |
| { | |
| $new_extract = true; | |
| } | |
| else | |
| { | |
| $new_extract = false; | |
| } | |
| } | |
| if ($new_extract) | |
| { | |
| $this->new_write_table($table_name); | |
| } | |
| else | |
| { | |
| $this->old_write_table($table_name); | |
| } | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function write_data($table_name) | |
| { | |
| if (!$this->is_initialized) | |
| { | |
| throw new extractor_not_initialized_exception(); | |
| } | |
| $this->write_data_mysqli($table_name); | |
| } | |
| /** | |
| * Extracts data from database table (for MySQLi driver) | |
| * | |
| * @param string $table_name name of the database table | |
| * @return null | |
| * @throws extractor_not_initialized_exception when calling this function before init_extractor() | |
| */ | |
| protected function write_data_mysqli($table_name) | |
| { | |
| if (!$this->is_initialized) | |
| { | |
| throw new extractor_not_initialized_exception(); | |
| } | |
| $sql = "SELECT * | |
| FROM $table_name"; | |
| $result = mysqli_query($this->db->get_db_connect_id(), $sql, MYSQLI_USE_RESULT); | |
| if ($result != false) | |
| { | |
| $fields_cnt = mysqli_num_fields($result); | |
| // Get field information | |
| $field = mysqli_fetch_fields($result); | |
| $field_set = array(); | |
| for ($j = 0; $j < $fields_cnt; $j++) | |
| { | |
| $field_set[] = $field[$j]->name; | |
| } | |
| $search = array("\\", "'", "\x00", "\x0a", "\x0d", "\x1a", '"'); | |
| $replace = array("\\\\", "\\'", '\0', '\n', '\r', '\Z', '\\"'); | |
| $fields = implode(', ', $field_set); | |
| $sql_data = 'INSERT INTO ' . $table_name . ' (' . $fields . ') VALUES '; | |
| $first_set = true; | |
| $query_len = 0; | |
| $max_len = get_usable_memory(); | |
| while ($row = mysqli_fetch_row($result)) | |
| { | |
| $values = array(); | |
| if ($first_set) | |
| { | |
| $query = $sql_data . '('; | |
| } | |
| else | |
| { | |
| $query .= ',('; | |
| } | |
| for ($j = 0; $j < $fields_cnt; $j++) | |
| { | |
| if (!isset($row[$j]) || is_null($row[$j])) | |
| { | |
| $values[$j] = 'NULL'; | |
| } | |
| else if (($field[$j]->flags & 32768) && !($field[$j]->flags & 1024)) | |
| { | |
| $values[$j] = $row[$j]; | |
| } | |
| else | |
| { | |
| $values[$j] = "'" . str_replace($search, $replace, $row[$j]) . "'"; | |
| } | |
| } | |
| $query .= implode(', ', $values) . ')'; | |
| $query_len += strlen($query); | |
| if ($query_len > $max_len) | |
| { | |
| $this->flush($query . ";\n\n"); | |
| $query = ''; | |
| $query_len = 0; | |
| $first_set = true; | |
| } | |
| else | |
| { | |
| $first_set = false; | |
| } | |
| } | |
| mysqli_free_result($result); | |
| // check to make sure we have nothing left to flush | |
| if (!$first_set && $query) | |
| { | |
| $this->flush($query . ";\n\n"); | |
| } | |
| } | |
| } | |
| /** | |
| * Extracts database table structure (for MySQLi or MySQL 3.23.20+) | |
| * | |
| * @param string $table_name name of the database table | |
| * @return null | |
| * @throws extractor_not_initialized_exception when calling this function before init_extractor() | |
| */ | |
| protected function new_write_table($table_name) | |
| { | |
| if (!$this->is_initialized) | |
| { | |
| throw new extractor_not_initialized_exception(); | |
| } | |
| $sql = 'SHOW CREATE TABLE ' . $table_name; | |
| $result = $this->db->sql_query($sql); | |
| $row = $this->db->sql_fetchrow($result); | |
| $sql_data = '# Table: ' . $table_name . "\n"; | |
| $sql_data .= "DROP TABLE IF EXISTS $table_name;\n"; | |
| $this->flush($sql_data . $row['Create Table'] . ";\n\n"); | |
| $this->db->sql_freeresult($result); | |
| } | |
| /** | |
| * Extracts database table structure (for MySQL versions older than 3.23.20) | |
| * | |
| * @param string $table_name name of the database table | |
| * @return null | |
| * @throws extractor_not_initialized_exception when calling this function before init_extractor() | |
| */ | |
| protected function old_write_table($table_name) | |
| { | |
| if (!$this->is_initialized) | |
| { | |
| throw new extractor_not_initialized_exception(); | |
| } | |
| $sql_data = '# Table: ' . $table_name . "\n"; | |
| $sql_data .= "DROP TABLE IF EXISTS $table_name;\n"; | |
| $sql_data .= "CREATE TABLE $table_name(\n"; | |
| $rows = array(); | |
| $sql = "SHOW FIELDS | |
| FROM $table_name"; | |
| $result = $this->db->sql_query($sql); | |
| while ($row = $this->db->sql_fetchrow($result)) | |
| { | |
| $line = ' ' . $row['Field'] . ' ' . $row['Type']; | |
| if (!is_null($row['Default'])) | |
| { | |
| $line .= " DEFAULT '{$row['Default']}'"; | |
| } | |
| if ($row['Null'] != 'YES') | |
| { | |
| $line .= ' NOT NULL'; | |
| } | |
| if ($row['Extra'] != '') | |
| { | |
| $line .= ' ' . $row['Extra']; | |
| } | |
| $rows[] = $line; | |
| } | |
| $this->db->sql_freeresult($result); | |
| $sql = "SHOW KEYS | |
| FROM $table_name"; | |
| $result = $this->db->sql_query($sql); | |
| $index = array(); | |
| while ($row = $this->db->sql_fetchrow($result)) | |
| { | |
| $kname = $row['Key_name']; | |
| if ($kname != 'PRIMARY') | |
| { | |
| if ($row['Non_unique'] == 0) | |
| { | |
| $kname = "UNIQUE|$kname"; | |
| } | |
| } | |
| if ($row['Sub_part']) | |
| { | |
| $row['Column_name'] .= '(' . $row['Sub_part'] . ')'; | |
| } | |
| $index[$kname][] = $row['Column_name']; | |
| } | |
| $this->db->sql_freeresult($result); | |
| foreach ($index as $key => $columns) | |
| { | |
| $line = ' '; | |
| if ($key == 'PRIMARY') | |
| { | |
| $line .= 'PRIMARY KEY (' . implode(', ', $columns) . ')'; | |
| } | |
| else if (strpos($key, 'UNIQUE') === 0) | |
| { | |
| $line .= 'UNIQUE ' . substr($key, 7) . ' (' . implode(', ', $columns) . ')'; | |
| } | |
| else if (strpos($key, 'FULLTEXT') === 0) | |
| { | |
| $line .= 'FULLTEXT ' . substr($key, 9) . ' (' . implode(', ', $columns) . ')'; | |
| } | |
| else | |
| { | |
| $line .= "KEY $key (" . implode(', ', $columns) . ')'; | |
| } | |
| $rows[] = $line; | |
| } | |
| $sql_data .= implode(",\n", $rows); | |
| $sql_data .= "\n);\n\n"; | |
| $this->flush($sql_data); | |
| } | |
| } |