php类实现完整备份数据库,或者备份数据库中指定表的功能:
-
class Backup
- {
- /**
- * @var stores the options
- */
- var $config;
-
- /**
- * @var stores the final sql dump
- */
- var $dump;
-
- /**
- * @var stores the table structure + inserts for every table
- */
- var $struktur = array();
-
- /**
- * @var zip file name
- */
- var $datei;
-
- /**
- * this function is the constructor and phrase the options
- * and connect to the database
- * @return
- */
- public function Backup($options)
- {
- // write options
- foreach($options AS $name => $value)
- {
- $this->config[$name] = $value;
- }
-
- // check mysql connection
- mysql_connect($this->config['mysql'][0], $this->config['mysql'][1], $this->config['mysql'][2]) or die(mysql_error());
- mysql_select_db($this->config['mysql'][3]) or die(mysql_error());
- }
-
- /**
- * this function start the backup progress its the core function
- * @return
- */
- public function backupDB()
- {
- // start backup
- if(isset($_POST['backup']))
- {
- // check if tables are selected
- if(empty($_POST['table']))
- {
- die("Please select a table.");
- }
-
- /** start backup **/
- $tables = array();
- $insert = array();
- $sql_statement = '';
-
- // lock tables
- foreach($_POST['table'] AS $table)
- {
- mysql_query("LOCK TABLE $table WRITE");
-
- // Read table structure
- $res = mysql_query('SHOW CREATE TABLE '.$table.'');
- $createtable = mysql_result($res, 0, 1);
- $str = "\n\n".$createtable."\n\n";
-
- array_push($tables, $str);
-
- // Read table "inserts"
- $sql = 'SELECT * FROM '.$table;
- $query = mysql_query($sql) or die(mysql_error());
- $feld_anzahl = mysql_num_fields($query);
-
- $sql_statement = '--
- -- Data Table `$table`
- --
-
- ';
-
- // start reading progress
- while($ds = mysql_fetch_object($query)){
- $sql_statement .= 'INSERT INTO `'.$table.'` (';
-
- for ($i = 0;$i if ($i ==$feld_anzahl-1){
- $sql_statement .= mysql_field_name($query,$i);
- } else {
- $sql_statement .= mysql_field_name($query,$i).', ';
- }
- }
-
- $sql_statement .= ') VALUES (';
-
- for ($i = 0;$i $name = mysql_field_name($query,$i);
- if (empty($ds->$name)){
- $ds->$name = 'NULL';
- }
- if ($i ==$feld_anzahl-1){
- $sql_statement .= '"'.$ds->$name.'"';
- } else {
- $sql_statement .= '"'.$ds->$name.'", ';
- }
- }
- $sql_statement .= ");\n";
- }
-
- // insert "Inserts" into an array if not exists
- if(!in_array($sql_statement, $insert))
- {
- array_push($insert, $sql_statement);
- unset($sql_statement);
- }
-
- unset($sql_statement);
-
- }
-
- // put table structure and inserts together in one var
- $this->struktur = array_combine($tables, $insert);
-
- // create full dump
- $this->createDUMP($this->struktur);
-
- // create zip file
- $this->createZIP();
-
- /** end backup **/
-
- // send an email with the sql dump
- if(isset($this->config['email']) && !empty($this->config['email']))
- {
- $this->sendEmail();
- }
-
- // output
- echo '
Backup war erfolgreich
Download Backup
-
-
';
- }
- }
-
- /**
- * this function generate an email with attachment
- * @return
- */
- protected function sendEmail()
- {
- // start sending emails
- foreach($this->config['email'] AS $email)
- {
- $to = $email;
-
- $from = $this->config['email'][0];
-
- $message_body = "This email contains the database backup as a zip file.";
-
- $msep = strtoupper (md5 (uniqid (time ())));
-
- // set email header (only text)
- $header =
- "From: $from\r\n" .
- "MIME-Version: 1.0\r\n" .
- "Content-Type: multipart/mixed; boundary="$msep"\r\n\r\n" .
- "--$msep\r\n" .
- "Content-Type: text/plain\r\n" .
- "Content-Transfer-Encoding: 8bit\r\n\r\n" .
- $message_body . "\r\n";
-
- // file name
- $dateiname = $this->datei;
-
- // get filesize of zip file
- $dateigroesse = filesize ($dateiname);
-
- // open file to read
- $f = fopen ($dateiname, "r");
- // save content
- $attached_file = fread ($f, $dateigroesse);
- // close file
- fclose ($f);
-
- // create attachment
- $attachment = chunk_split (base64_encode ($attached_file));
-
- // set attachment header
- $header .=
- "--" . $msep . "\r\n" .
- "Content-Type: application/zip; name='Backup'\r\n" .
- "Content-Transfer-Encoding: base64\r\n" .
- "Content-Disposition: attachment; filename='Backup.zip'\r\n" .
- "Content-Description: Mysql Datenbank Backup im Anhang\r\n\r\n" .
- $attachment . "\r\n";
-
- // mark end of attachment
- $header .= "--$msep--";
-
- // eMail Subject
- $subject = "Database Backup";
-
- // send email to emails^^
- if(mail($to, $subject, '', $header) == FALSE)
- {
- die("The email could not be sent. Please check the email address.");
- }
-
- echo "
Email was successfully sent. ";
- }
- }
-
- /**
- * this function create the zip file with the database dump and save it on the ftp server
- * @return
- */
- protected function createZIP()
- {
-
- // Set permissions to 777
- chmod($this->config['folder'], 0777);
-
- // create zip file
- $zip = new ZipArchive();
- // Create file name
- $this->datei = $this->config['folder'].$this->config['mysql'][3]."_".date("j_F_Y_g:i_a").".zip";
-
- // Checking if file could be created
- if ($zip->open($this->datei, ZIPARCHIVE::CREATE)!==TRUE) {
- exit("cannot open datei.">\n");
- }
-
- // add mysql dump to zip file
- $zip->addFromString("dump.sql", $this->dump);
- // close file
- $zip->close();
-
- // Check whether file has been created
- if(!file_exists($this->datei))
- {
- die("The ZIP file could not be created.");
- }
-
- echo "
The zip was created. ";
- }
-
- /**
- * this function create the full sql dump
- * @param object $dump
- * @return
- */
- protected function createDUMP($dump)
- {
- $date = date("F j, Y, g:i a");
-
- $header = -- SQL Dump
- --
- -- Host: {$_SERVER['HTTP_HOST']}
- -- Erstellungszeit: {$date}
-
- --
- -- Datenbank: `{$this->config['mysql'][3]}`
- --
-
- -- --------------------------------------------------------
-
- HEADER;
- foreach($dump AS $name => $value)
- {
- $sql .= $name.$value;
- }
- $this->dump = $header.$sql;
- }
-
- /**
- * this function displays the output form to select tables
- * @return
- */
- public function outputForm()
- {
- // select all tables from database
- $result = mysql_list_tables($this->config['mysql'][3]);
-
- $buffer = '
- ';
-
- echo $buffer;
- }
- }
- ?>
复制代码
备份用法:
-
- //You can add as many email addresses as you like
- $options = array('email' => array('email1', 'email2'),
- 'folder' => './backup/',
- 'mysql' => array('localhost', 'root', '****', 'database'));
-
- $b = new Backup($options);
-
- // if submit form start backup
- if(isset($_POST['backup']))
- {
- // start backup
- $b->backupDB();
- }
-
- // display tables
- $b->outputForm();
-
- ?>
复制代码
|