DBExport.php

<?php

class DBExport
{
    function run($conf, $file = "backup.sql")
    {
        $tables=false;
        $backup_name="da";
        error_reporting(0);
        $host = $conf['host'];
        $user = $conf['user'];
        $pass = $conf['pass'];
        $name = $conf['dbname'];
        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";
            $TableMLine[1]=str_ireplace('CREATE TABLE `', 'CREATE TABLE IF NOT EXISTS `', $TableMLine[1]);
            for ($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.= ',';
                        }
                    }
                    $content .=")";
                    if ((($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 : $name.'___('.date('H-i-s').'_'.date('d-m-Y').').sql';
        ob_get_clean();
        header('Content-Type: application/octet-stream');
        header("Content-Transfer-Encoding: Binary");
        header('Content-Length: '. (function_exists('mb_strlen') ? mb_strlen($content, '8bit'): strlen($content)) );
        header("Content-disposition: attachment; filename=\"".$backup_name."\""); 
	    echo $content;
        exit;
    }
}