Php Mysql Database backup and restore

Backup.php

<?php 
$dump_path = ""; //input location for the backup to be saved
$host = "";  //db host e.g.- localhost 
$user = "";  //user e.g.-root
$pass = "";  //password
$command=$dump_path.'mysqldump -h '.$host.' -u '.$user.' bank > bank.sql';
system($command);
?> 

Restore.php

<?php 
$dump_path = "";  //your backup location
$host = "";   //host
$user = "";  //username
$pass = "";  /passwprd
$command=$dump_path.'mysql -h '.$host.' -u '.$user.' bank < bank.sql';
system($command);
?>

Restore not working, since 'mysql -h '.$host.' -u '.$user.' bank < bank.sql' command asking for password when entered in command prompt

@sagar03d try this in the restore.php file.

$tempConfig = tmpfile();
fwrite($tempConfig, "[client]\nhost={$host}\nuser={$user}\npassword={$pass}");
$tempConfigPath = stream_get_meta_data($tempConfig)['uri'];
system("mysql --defaults-extra-file={$tempConfigPath} bank < bank.sql');

hello ... the Backup.php returns an empty file ?? what is the problem (Testing on localhost wampserver)