[php] Using a .php file to generate a MySQL dump

Here's the information I have:

I am working with a Linux based system using MySQL and PHP5. I need to be able to generate a mysqldump from within a .php file, and then have that dump be stored in a file on the server in a location I would specify.

As I'm a PHP nooblet, I'd like someone to give me some assistance, guidance, or code, that would do what I require. This would have to be run remotely from the Internet.

If you want to create a backup to download it via the browser, you also can do this without using a file.

The php function passthru() will directly redirect the output of mysqldump to the browser. In this example it also will be zipped.

Pro: You don't have to deal with temp files.

Con: Won't work on Windows. May have limits with huge datasets.

<?php

$DBUSER="user";
$DBPASSWD="password";
$DATABASE="user_db";

$filename = "backup-" . date("d-m-Y") . ".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";   

passthru( $cmd );

exit(0);
?>

<?php exec('mysqldump --all-databases > /your/path/to/test.sql'); ?>

You can extend the command with any options mysqldump takes ofcourse. Use man mysqldump for more options (but I guess you knew that ;))

Please reffer to the following link which contains a scriptlet that will help you: http://davidwalsh.name/backup-mysql-database-php

Note: This script may contain bugs with NULL data types

MajorLeo's answer point me in the right direction but it didn't worked for me. I've found this site that follows the same approach and did work.

$dir = "path/to/file/";
$filename = "backup" . date("YmdHis") . ".sql.gz";

$db_host = "host";
$db_username = "username";
$db_password = "password";
$db_database = "database";

$cmd = "mysqldump -h {$db_host} -u {$db_username} --password={$db_password} {$db_database} | gzip > {$dir}{$filename}";
exec($cmd);

header("Content-type: application/octet-stream");
header("Content-Disposition: attachment; filename=\"$filename\"");

passthru("cat {$dir}{$filename}");

I hope it helps someone else!

Here's another native PHP based option: https://github.com/2createStudio/shuttle-export

None of the above codes worked for me. I am using windows. Below Code worked for me...

$sql = "SELECT * FROM  $tableName WHERE yourclause";
$result = $conn->query($sql);


if($result){

        if ($result->num_rows > 0) {

            $myfile = fopen("daily_events_$district.sql", "w") or die("Unable to open file!");

            while($row = $result->fetch_assoc()) {  

                $rowToString = implode("','",$row);
                $writeToFile = "INSERT INTO $tableName VALUES('$rowToString');". PHP_EOL;
                fwrite($myfile,$writeToFile);
            }
            echo "File saved successfully";
        }
    } else {
        echo "No result found";
    }

This will save file in your project folder according to your query whatever data you want.

Well, you can always use PHP's system function call.

http://php.net/manual/en/function.system.php

http://www.php.net/manual/en/function.exec.php

That runs any command-line program from PHP.

For security reasons, it's recommended to specify the password in a configuration file and not in the command (a user can execute a ps aux | grep mysqldump and see the password).

//create a temporary file
$file   = tempnam(sys_get_temp_dir(), 'mysqldump');

//store the configuration options
file_put_contents($file, "[mysqldump]
user={$user}
password=\"{$password}\"");

//execute the command and output the result
passthru("mysqldump --defaults-file=$file {$dbname}");

//delete the temporary file
unlink($file);

To dump database using shell_exec(), below is the method :

shell_exec('mysqldump -h localhost -u username -ppassword databasename  | gzip > dbname.sql.gz');

Take a look here: https://github.com/ifsnop/mysqldump-php ! It is a native solution written in php.

You can install it using composer, and it is as easy as doing:

<?php

use Ifsnop\Mysqldump as IMysqldump;

try {
    $dump = new IMysqldump\Mysqldump('database', 'username', 'password');
    $dump->start('storage/work/dump.sql');
} catch (\Exception $e) {
    echo 'mysqldump-php error: ' . $e->getMessage();
}

?>

It supports advanced users, with lots of options copied from the original mysqldump.

All the options are explained at the github page, but more or less are auto-explicative:

$dumpSettingsDefault = array(
    'include-tables' => array(),
    'exclude-tables' => array(),
    'compress' => 'None',
    'no-data' => false,
    'add-drop-database' => false,
    'add-drop-table' => false,
    'single-transaction' => true,
    'lock-tables' => false,
    'add-locks' => true,
    'extended-insert' => true,
    'disable-foreign-keys-check' => false,
    'where' => '',
    'no-create-info' => false
);

As long as you are allowed to use exec(), you can execute shell commands through your PHP code.

So assuming you know how to write the mysqldump in the command line, i.e.

mysqldump -u [username] -p [database] > [database].sql

then you can use this as the parameter to exec() function.

exec("mysqldump -u mysqluser -p my_database > my_database_dump.sql");

<?php
    $toDay = date('d-m-Y');

    $dbhost =   "localhost";
    $dbuser =   "YOUR DB USER";
    $dbpass =   "USER PASSWORD";
    $dbname =   "DB NAME";

    exec("mysqldump --user=$dbuser --password='$dbpass' --host=$dbhost $dbname > /home/....../public_html/".$toDay."_DB.sql");


?>

Here you can find a comprehensive solution to dump mysql structure and data like in PMA (and without using exec, passthru etc.):

https://github.com/antarasi/MySQL-Dump-with-Foreign-keys

It is fork of dszymczuk project with my enhancements.

The usage is simple

<?php
//MySQL connection parameters
$dbhost = 'localhost';
$dbuser = 'dbuser';
$dbpsw = 'pass';
$dbname = 'dbname';

//Connects to mysql server
$connessione = @mysql_connect($dbhost,$dbuser,$dbpsw);

//Set encoding
mysql_query("SET CHARSET utf8");
mysql_query("SET NAMES 'utf8' COLLATE 'utf8_general_ci'");

//Includes class
require_once('FKMySQLDump.php');


//Creates a new instance of FKMySQLDump: it exports without compress and base-16 file
$dumper = new FKMySQLDump($dbname,'fk_dump.sql',false,false);

$params = array(
    //'skip_structure' => TRUE,
    //'skip_data' => TRUE,
);

//Make dump
$dumper->doFKDump($params);

?>

works like a charm :-)