php - 使用 CodeIgniter 备份 MySQL 数据库

Question

我一直在研究 CodeIgniter 附带的用户指南。我对这种方法非常感兴趣dbutil()。特别是以下代码行：

// Load the DB utility class
$this->load->dbutil();

// Backup your entire database and assign it to a variable
$backup =& $this->dbutil->backup(); 

// Load the file helper and write the file to your server
$this->load->helper('file');
write_file('/path/to/mybackup.gz', $backup); 

// Load the download helper and send the file to your desktop
$this->load->helper('download');
force_download('mybackup.gz', $backup);

它应该备份当前加载的 MySQL 数据库。但不幸的是，它不起作用，我收到以下消息：

遇到 PHP 错误

严重性：通知

消息：未定义的属性：CI_Loader::$dbutil

文件名：views/view.php

行号：10

致命错误：调用第 10 行 C:\xampp\htdocs\CodeIgniter\application\views\view.php 中非对象的成员函数 backup()

我在这里想念什么？任何帮助将非常感激。

score 31 · Accepted Answer

试试这个，如果你愿意，你可以将格式 zip 更改为 gz :)

$this->load->dbutil();

$prefs = array(     
    'format'      => 'zip',             
    'filename'    => 'my_db_backup.sql'
    );


$backup =& $this->dbutil->backup($prefs); 

$db_name = 'backup-on-'. date("Y-m-d-H-i-s") .'.zip';
$save = 'pathtobkfolder/'.$db_name;

$this->load->helper('file');
write_file($save, $backup); 


$this->load->helper('download');
force_download($db_name, $backup);

score 7 · Accepted Answer

使用 php 执行此操作仅适用于非常小的数据库。您将很快遇到内存限制 - 如果您增加其他性能问题。

最有效的是使用 mysqldump 创建转储：

header('Content-type: application/force-download');
header('Content-Disposition: attachment; filename="dbbackup.sql.gz"');
passthru("mysqldump --user=xx --host=xx --password=xx dbname | gzip");

当然，您必须具有执行此操作所需的权限。

score 6 · Accepted Answer

//load helpers

$this->load->helper('file');
$this->load->helper('download');
$this->load->library('zip');

//load database
$this->load->dbutil();

//create format
$db_format=array('format'=>'zip','filename'=>'backup.sql');

$backup=& $this->dbutil->backup($db_format);

// file name

$dbname='backup-on-'.date('d-m-y H:i').'.zip';
$save='assets/db_backup/'.$dbname;

// write file

write_file($save,$backup);

// and force download
force_download($dbname,$backup);

score 2 · Accepted Answer

public function db_backup()
{
    $this->load->helper('url');
    $this->load->helper('file');
    $this->load->helper('download');
    $this->load->library('zip');
    $this->load->dbutil();
    $db_format=array('format'=>'zip','filename'=>'my_db_backup.sql');
    $backup=& $this->dbutil->backup($db_format);
    $dbname='backup-on-'.date('Y-m-d').'.zip';
    $save='assets/db_backup/'.$dbname;
    write_file($save,$backup);
    force_download($dbname,$backup);

}`

score 2 · Accepted Answer

function backup($fileName='db_backup.zip'){
    // Load the DB utility class
    $this->load->dbutil();

    // Backup your entire database and assign it to a variable
    $backup =& $this->dbutil->backup();

    // Load the file helper and write the file to your server
    $this->load->helper('file');
    write_file(FCPATH.'/downloads/'.$fileName, $backup);

    // Load the download helper and send the file to your desktop
    $this->load->helper('download');
    force_download($fileName, $backup);
}

使用 codeigniter 备份数据库的简单方法

score 1 · Accepted Answer

我对 CodeIgniter 非常陌生，但我成功地进行了此备份。试试这个，它会成功并且很容易实现。在您的控制器中编写代码并从您的视图页面调用用于备份的函数。准备好，走，你就完成了。

function dbbackup()
{
    $this->load->dbutil();   
    $backup =& $this->dbutil->backup();  
    $this->load->helper('file');
    write_file('<?php echo base_url();?>/downloads', $backup);
    $this->load->helper('download');
    force_download('mybackup.gz', $backup);
}

对于完整的应用程序备份，使用以下代码执行相同的过程：

function backup()
{
    $this->load->helper('download');
    $this->load->library('zip'); 
    $time = time(); 
    $this->zip->read_dir('D:xampp/htdocs/wms/');
    $this->zip->download('my_backup.'.$time.'.zip');
}

在这里，您可以使用您选择的任何路径。

score 1 · Accepted Answer

试试这个...它已经过测试...如果您要使用 mysqli 那么它会正常工作...您可以将您的代码放在您的控制器或模型中，但我建议将这个保留在 your_model 中并调用它来自 your_controller 的函数...

public function db_backup()
{
       $this->load->dbutil();   
       $backup =& $this->dbutil->backup();  
       $this->load->helper('file');
       write_file('your_file_path/your_DB.zip', $backup); 
}

score 1 · Accepted Answer

如果您有幸在您的服务器上启用了、或exec()之一。也许您想使用以下内容：shell_exec()system()passthru()

public function db_backup()
{
    $DBUSER=$this->db->username;
    $DBPASSWD=$this->db->password;
    $DATABASE=$this->db->database;

    $filename = $DATABASE . "-" . date("Y-m-d_H-i-s") . ".sql.gz";
    $mime = "application/x-gzip";

    header( "Content-Type: " . $mime );
    header( 'Content-Disposition: attachment; filename="' . $filename . '"' );

    // $cmd = "mysqldump -u $DBUSER --password=$DBPASSWD $DATABASE | gzip --best";   
    $cmd = "mysqldump -u $DBUSER --password=$DBPASSWD --no-create-info --complete-insert $DATABASE | gzip --best";

    passthru( $cmd );

    exit(0);
}

score 1 · Accepted Answer

$content = 'SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO"; 开始交易；SET time_zone = "+00:00";';

    if($tables = $this->db->list_tables()){
        foreach($tables as $table){
            $content .= ' DROP TABLE IF EXISTS `' . $table . '`;';
            $content .= $this->db->query('SHOW CREATE TABLE ' . $table)->row_array()['Create Table'] . ';'; 
            $fields = $this->db->list_fields($table);
            $table_data = $this->db->query('SELECT * FROM ' . $table)->result_array();
            $insert_field = '';
            $insert_values = '';
            if($fields && $table_data){
                $insert_field .= 'INSERT INTO `' . $table . '` (';

                foreach($fields as $field){
                    $insert_field .= '`' . $field . '`,';
                }
                $insert_field = substr($insert_field,0,-1);
                $insert_field .= ')';
                
                $insert_values .= ' VALUES ';
                foreach($table_data as $table_row){
                    $insert_values .= '(' ;
                    foreach($table_row as $column => $value){
                        $insert_values .= "'" . addslashes($value) . "',";
                    }
                    $insert_values = substr($insert_values,0,-1);
                    $insert_values .= '),';
                }
                $insert_values = substr($insert_values,0,-1) . '; ';
            }
            $content .= $insert_field . $insert_values;
        }
    }
    $file_path = "./uploads/backup-" . date('Y-m-d') . ".sql";
    $myfile = fopen($file_path, "w");
    fwrite($myfile, $content);
    fclose($myfile);

score 1 · Accepted Answer

 public function backup(){
    $this->load->dbutil();
    $config = array(     
        'format'      => 'zip',             
        'filename'    => 'insert-file-name.sql'
    );

    $backup =& $this->dbutil->backup($config); 

    $db_name = 'backup-on-'. date("Y-m-d-H-i-s") .'.zip';
    $save = 'uploads/'.$db_name;

    $this->load->helper('file');
    write_file($save, $backup); 
    $this->load->helper('download');
    force_download($db_name, $backup);

}

score 0 · Accepted Answer

问题是您在引导过程中很早就尝试备份数据库。

当我试图破解 CodeIgniter 来备份我的数据库时，我遇到了同样的问题：

$prefs = array(
            'ignore'=> array('codes_cdt','codes_cpt','codes_icd10_dx_order','codes_icd10_pcs_order','pharma'),
            'format'=>'gzip','filename','add_drop'=> TRUE,'add_insert'=>TRUE,'newline'=> "\n");

$filename = APPPATH.'\\backups\\' .'backup-' . date('d-m-Y') . ' .gz';
if(!file_exists($filename)){
    get_instance()->load->dbutil();
    file_put_contents( $filename, $this->dbutil->backup($prefs));
}

在我config.php文件的底部。

将它移动到模型并允许它自动加载，你会没事的。

score 0 · Accepted Answer

尝试这个！

$username = "root";
$password = "root";
$hostname = "localhost";
$dbname   = "raas";

header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.basename($dbname . "_" .date("Y-m-d_H-i-s").".sql"));

$command = "C:\AppServ\MySQL\bin\mysqldump --add-drop-table --host=$hostname   --user=$username --password=$password ".$dbname;

system($command);

score 0 · Accepted Answer

这些行已从 codeigniters 文档中获取：

重要提示：为了初始化实用程序类，您的数据库驱动程序必须已经在运行，因为实用程序类依赖于它。

调用此函数时，请检查您的数据库类是否已加载。或者您可以在加载 dbutil 类之前放置这一行$this->load->database();

score 0 · Accepted Answer

如果要归档数据库，请使用函数 $this->archive_database(); 此函数将 .sql 文件保存在根文件夹中名为 archives 的文件夹中

// to intialize the path split the real path by dot .
        public function init_path($string){
            $array_path =  explode('.', $string);
            $realpath  = ''; 
            foreach ($array_path as $p)
            {
              
                $realpath .= $p;
                $realpath .= '/';
            }
            return $realpath;
            
        }
        
        // backup database function         
        public function archive_database($host = '',$user ='',$pass ='',$name ='', $path = '' , $download_allow = false ,       $tables=false, $backup_name=false){ 
            $CI = &get_instance();
            $CI->load->database();
            if($path != '')
            {
                $path = realpath($this->init_path($path));
                
            }else{
                if (!is_dir('archives/'))
            mkdir('archives/', 0777);
                $path = realpath($this->init_path('archives'));
            }
            if($host == '')
            {
                $host = $CI->db->hostname;
                
            }
            if($user == '')
            {
                $user = $CI->db->username;
                
            }
            if($pass == '')
            {
                $pass = $CI->db->password;
                
            }
            if($name == '')
            {
                $name = $CI->db->database;
                
            }
            
            set_time_limit(3000); 
            $mysqli = new mysqli($host,$user,$pass,$name); 
            $mysqli->select_db($name);
            $mysqli->query("SET NAMES 'utf8'");
            $queryTables = $mysqli->query('SHOW TABLES');
            while($row = $queryTables->fetch_row()) { $target_tables[] = $row[0]; } 
            if($tables !== false)
                { $target_tables = array_intersect( $target_tables, $tables); } 
            $content = "SET SQL_MODE = \"NO_AUTO_VALUE_ON_ZERO\";\r\nSET time_zone = \"+00:00\";\r\n\r\n\r\n/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;\r\n/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;\r\n/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;\r\n/*!40101 SET NAMES utf8 */;\r\n--\r\n-- Database: `".$name."`\r\n--\r\n\r\n\r\n";
            foreach($target_tables as $table){
                if (empty($table)){ continue; } 
                $result = $mysqli->query('SELECT * FROM `'.$table.'`');
                $fields_amount=$result->field_count; 
                $rows_num=$mysqli->affected_rows; 
                $res = $mysqli->query('SHOW CREATE TABLE '.$table);
                $TableMLine=$res->fetch_row(); 
                $content .= "\n\n".$TableMLine[1].";\n\n";
                for ($i = 0, $st_counter = 0; $i < $fields_amount;   $i++, $st_counter=0) {
                    while($row = $result->fetch_row())  { //when started (and every after 100 command cycle):
                        if ($st_counter%100 == 0 || $st_counter == 0 )  {$content .= "\nINSERT INTO ".$table." VALUES";}
                            $content .= "\n(";    for($j=0; $j<$fields_amount; $j++){ $row[$j] = str_replace("\n","\\n", addslashes($row[$j]) ); if (isset($row[$j])){$content .= '"'.$row[$j].'"' ;}  else{$content .= '""';}     if ($j<($fields_amount-1)){$content.= ',';}   }        $content .=")";
                        //every after 100 command cycle [or at last line] ....p.s. but should be inserted 1 cycle eariler
                        if ( (($st_counter+1)%100==0 && $st_counter!=0) || $st_counter+1==$rows_num) {$content .= ";";} else {$content .= ",";} $st_counter=$st_counter+1;
                    }
                } $content .="\n\n\n";
            }
            $content .= "\r\n\r\n/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;\r\n/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;\r\n/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;";
            $backup_name = $backup_name ? $backup_name : $name."___(".date('H-i-s')."_".date('d-m-Y').")__rand".rand(1,11111111).".sql";
            
            $fileLocation = $path .'\\'. $backup_name;
            $file = fopen($fileLocation,"w");
            fwrite($file,$content);
            fclose($file);
            
            
            if($download_allow){
            ob_get_clean(); header('Content-Type: application/octet-stream');   header("Content-Transfer-Encoding: Binary"); header("Content-disposition: attachment; filename=\"".$backup_name."\"");
            }
            
            echo $content; exit;
        }

score 0 · Accepted Answer

 <?

// Try this one, this works FOR both codeigniter and core PHP

            public function Export_Database()
                {
                    date_default_timezone_set('GMT');
                   // Load the file helper in codeigniter
                    $this->load->helper('file');


            $con = mysqli_connect("localhost","username","password","databasename");

            $tables = array();
            $query = mysqli_query($con, 'SHOW TABLES');
            while($row = mysqli_fetch_row($query)){
                 $tables[] = $row[0];
            }

            $result = 'SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";';
            $result .= 'SET time_zone = "+00:00";';

            foreach($tables as $table){
            $query = mysqli_query($con, 'SELECT * FROM `'.$table.'`');
            $num_fields = mysqli_num_fields($query);

            $result .= 'DROP TABLE IF EXISTS '.$table.';';
            $row2 = mysqli_fetch_row(mysqli_query($con, 'SHOW CREATE TABLE `'.$table.'`'));
            $result .= "\n\n".$row2[1].";\n\n";

            for ($i = 0; $i < $num_fields; $i++) {
            while($row = mysqli_fetch_row($query)){
               $result .= 'INSERT INTO `'.$table.'` VALUES(';
                 for($j=0; $j<$num_fields; $j++){
                   $row[$j] = addslashes($row[$j]);
                   $row[$j] = str_replace("\n","\\n",$row[$j]);
                if(isset($row[$j])){
                       $result .= '"'.$row[$j].'"' ; 
                    }else{ 
                        $result .= '""';
                    }
                    if($j<($num_fields-1)){ 
                        $result .= ',';
                    }
                }
                $result .= ");\n";
            }
            }
            $result .="\n\n";
            }

            //Create Folder
            $folder = 'database/';
            if (!is_dir($folder))
            mkdir($folder, 0777, true);
            chmod($folder, 0777);

            $date = date('m-d-Y'); 
            $filename = $folder."db_filename_".$date; 

            $handle = fopen($filename.'.sql','w+');
            fwrite($handle,$result);
            fclose($handle);
            redirect('Dashboard');           


                } // end Export_Database function
            ?>

score -3 · Accepted Answer

-3

无需base_url()在路径添加

于 2015-10-11T08:49:44.287 回答

php - 使用 CodeIgniter 备份 MySQL 数据库

16 回答 16

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