Export Big sql/mysql database using php file

Export Big sql/mysql database using php file

error_reporting(E_ALL ^ E_NOTICE);
ini_set('display_errors', 1);
ini_set('memory_limit', '512M');
$dbinfo = array(
    "host" => 'localhost',
    "user" => 'root',
    "pass" => 'root',
    "dbname" => 'dbname'
);

// Database Config
$sqlhost = $dbinfo["host"];
$dbuser = $dbinfo["user"];
$dbpassword = $dbinfo["pass"];
$dbname = $dbinfo["dbname"];
// filename
$file = date('Ymdhis');
echo shell_exec("mysqldump --add-drop-table -u $dbuser -p$dbpassword`cat /etc/psa/.psa.shadow` $dbname > $file.sql");
//shell_exec("mysql -u $dbuser --password='$dbpassword' --host='$sqlhost' $dbname < $file");
echo 'Finished!<br/>';