分享一个php数据库备份还原类。设置开启时间，启动PDO连接，储存表定义语句的数组，确定要备份的表，获取表单数据，写入文件。解析SQL文件为SQL语句数组
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 | <?php //数据库备份还原类 class DatabaseTool { private $handler; private $config = array( 'host' => 'localhost', 'port' => 3306, 'user' => 'root', 'password' => '', 'database' => 'test', 'charset' => 'utf8', 'target' => 'sql.sql' ); private $tables = array(); private $error; private $begin; //开始时间 /** * 架构方法 * @param array $config */ public function __construct($config = array()) { $this->begin = microtime(true); $config = is_array($config) ? $config : array(); $this->config = array_merge($this->config, $config); //启动PDO连接 try { $this->handler = new PDO("mysql:host={$this->config['host']}:{$this->config['port']};dbname={$this->config['database']}", $this->config['user'], $this->config['password']); } catch (PDOException $e) { $this->error = $e->getMessage(); return false; } catch (Exception $e) { $this->error = $e->getMessage(); return false; } } /** * 备份 * @param array $tables * @return bool */ public function backup($tables = array()) { //存储表定义语句的数组 $ddl = array(); //存储数据的数组 $data = array(); $this->setTables($tables); if (!empty($this->tables)) { foreach ($this->tables as $table) { $ddl[] = $this->getDDL($table); $data[] = $this->getData($table); } //开始写入 $this->writeToFile($this->tables, $ddl, $data); } else { $this->error = '数据库中没有表!'; return false; } } /** * 设置要备份的表 * @param array $tables */ private function setTables($tables = array()) { if (!empty($tables) && is_array($tables)) { //备份指定表 $this->tables = $tables; } else { //备份全部表 $this->tables = $this->getTables(); } } /** * 查询 * @param string $sql * @return mixed */ private function query($sql = '') { $stmt = $this->handler->query($sql); $stmt->setFetchMode(PDO::FETCH_NUM); $list = $stmt->fetchAll(); return $list; } /** * 获取全部表 * @return array */ private function getTables() { $sql = 'SHOW TABLES'; $list = $this->query($sql); $tables = array(); foreach ($list as $value) { $tables[] = $value[0]; } return $tables; } /** * 获取表定义语句 * @param string $table * @return mixed */ private function getDDL($table = '') { $sql = "SHOW CREATE TABLE `{$table}`"; $ddl = $this->query($sql)[0][1] . ';'; return $ddl; } /** * 获取表数据 * @param string $table * @return mixed */ private function getData($table = '') { $sql = "SHOW COLUMNS FROM `{$table}`"; $list = $this->query($sql); //字段 $columns = ''; //需要返回的SQL $query = ''; foreach ($list as $value) { $columns .= "`{$value[0]}`,"; } $columns = substr($columns, 0, -1); $data = $this->query("SELECT * FROM `{$table}`"); foreach ($data as $value) { $dataSql = ''; foreach ($value as $v) { $dataSql .= "'{$v}',"; } $dataSql = substr($dataSql, 0, -1); $query .= "INSERT INTO `{$table}` ({$columns}) VALUES ({$dataSql});\\r\\n"; } return $query; } /** * 写入文件 * @param array $tables * @param array $ddl * @param array $data */ private function writeToFile($tables = array(), $ddl = array(), $data = array()) { $str = "/*\\r\\nMySQL Database Backup Tools\\r\\n"; $str .= "Server:{$this->config['host']}:{$this->config['port']}\\r\\n"; $str .= "Database:{$this->config['database']}\\r\\n"; $str .= "Data:" . date('Y-m-d H:i:s', time()) . "\\r\\n*/\\r\\n"; $str .= "SET FOREIGN_KEY_CHECKS=0;\\r\\n"; $i = 0; foreach ($tables as $table) { $str .= "-- ----------------------------\\r\\n"; $str .= "-- Table structure for {$table}\\r\\n"; $str .= "-- ----------------------------\\r\\n"; $str .= "DROP TABLE IF EXISTS `{$table}`;\\r\\n"; $str .= $ddl[$i] . "\\r\\n"; $str .= "-- ----------------------------\\r\\n"; $str .= "-- Records of {$table}\\r\\n"; $str .= "-- ----------------------------\\r\\n"; $str .= $data[$i] . "\\r\\n"; $i++; } echo file_put_contents($this->config['target'], $str) ? '备份成功!花费时间' . (microtime(true) - $this->begin) . 'ms' : '备份失败!'; } /** * 错误信息 * @return mixed */ public function getError() { return $this->error; } public function restore($path = '') { if (!file_exists($path)) { $this->error('SQL文件不存在!'); return false; } else { $sql = $this->parseSQL($path); try { $this->handler->exec($sql); echo '还原成功!花费时间', (microtime(true) - $this->begin) . 'ms'; } catch (PDOException $e) { $this->error = $e->getMessage(); return false; } } } /** * 解析SQL文件为SQL语句数组 * @param string $path * @return array|mixed|string */ private function parseSQL($path = '') { $sql = file_get_contents($path); $sql = explode("\\r\\n", $sql); //先消除--注释 $sql = array_filter($sql, function ($data) { if (empty($data) || preg_match('/^--.*/', $data)) { return false; } else { return true; } }); $sql = implode('', $sql); //删除/**/注释 $sql = preg_replace('/\\/\\*.*\\*\\//', '', $sql); return $sql; } } |
