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mysql_backup.php
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mysql_backup.php
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<?php
require_once("include/db_mysqli.php");
class db {
public $db_login;
public $db_password;
public $db_database;
public $backup_folder;
public $purge;
public $purge_pattern;
public $filename;
public $error_msg;
function __construct()
{
$this->backup_folder = '';
$this->purge = false;
$this->purge_pattern = '';
$this->filename = 'db_backup';
$this->error_msg = '';
} // construct
public function backup()
{
$os = php_uname('s');
/*
check if the backup folder exists
*/
if (!file_exists($this->backup_folder)) {
if (!mkdir($this->backup_folder)) {
$this->error_msg = "Could not create folder '".$this->backup_folder."' - please create the folder manually and try again";
return false;
}
}
$temp_filename = "mysqlexport.sql";
$this->filename .= "_".date('Y')."_".date('m')."_".date('j').".sql.gz";
/*
purge previous backup files
*/
if ($this->purge) {
if (!empty($this->purge_pattern)) {
$arr = glob($this->backup_folder."/".$this->purge_pattern."*");
if (count($arr) > 0) {
foreach ($arr as $file) {
unlink($file);
}
}
}
}
/*
check if the file was already created
*/
if (file_exists($this->backup_folder."/".$this->filename))
{
$this->error_msg = "Backup file $filename already exists";
return false;
}
/*
create the temporary database backup file
*/
if ($os == "Linux") {
$strExportCommand = "/usr/bin/mysqldump -a -u ".$this->db_login." --password=".$this->db_password." ".$this->db_database." > \"".$this->backup_folder."/".$temp_filename."\"";
exec($strExportCommand);
$data = implode("", file($this->backup_folder."/".$temp_filename));
$gzdata = gzencode($data);
}
else {
$strExportCommand = "mysqldump -a -u ".$this->db_login." --password=".$this->db_password." ".$this->db_database." > \"".$this->backup_folder."/".$temp_filename."\"";
exec($strExportCommand);
$data = implode("", file($this->backup_folder."/".$temp_filename));
$gzdata = gzencode($data);
}
/*
write the zipped data to file
*/
$fp = fopen($this->backup_folder."/".$this->filename, "w");
if (!$fp)
{
$this->error_msg = 'error creating zip file';
return false;
}
fwrite($fp, $gzdata);
fclose($fp);
unlink($this->backup_folder."/".$temp_filename);
return true;
} // function backup
} // class db
?>