Web Development

Monday, August 14, 2023

<?php

    $mysqlUserName      = 'databaseusername';

    $mysqlPassword      = 'databasepassword';

    $mysqlHostName      = 'localhost';

    $DbName             = 'mydatabasename';

    Export_Database($mysqlHostName,$mysqlUserName,$mysqlPassword,$DbName,  $tables=false, $backup_name=false );

    function Export_Database($host,$user,$pass,$name,  $tables=false, $backup_name=false )

{

        $mysqli = new mysqli($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); 

}

        foreach($target_tables as $table)

{

            $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();

            $content        = (!isset($content) ?  '' : $content) . "\n\n".$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";

}

        $backup_name = $name.".sql";

        header('Content-Type: application/octet-stream');   

        header("Content-Transfer-Encoding: Binary"); 

        header("Content-disposition: attachment; filename=\"".$backup_name."\"");  

        echo $content; exit;

}

?>