Download latest WordPress unzip and add keys

gistfile1.php

<?php
$fp = fopen('wordpress.zip', 'w');
$ch = curl_init('http://wordpress.org/latest.zip');
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_FILE, $fp);
curl_exec($ch);
curl_close($ch);
exec('unzip wordpress.zip');
exec('cp -R wordpress/* .');
exec('rm wordpress.zip');
exec('rm -rf wordpress');

$ch = curl_init('https://api.wordpress.org/secret-key/1.1/salt/');
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$result = curl_exec($ch);
curl_close($ch);
$keys = explode("\n", trim($result));
$keys_replace = array(
	"define('AUTH_KEY',         'put your unique phrase here');",
	"define('SECURE_AUTH_KEY',  'put your unique phrase here');",
	"define('LOGGED_IN_KEY',    'put your unique phrase here');",
	"define('NONCE_KEY',        'put your unique phrase here');",
	"define('AUTH_SALT',        'put your unique phrase here');",
	"define('SECURE_AUTH_SALT', 'put your unique phrase here');",
	"define('LOGGED_IN_SALT',   'put your unique phrase here');",
	"define('NONCE_SALT',       'put your unique phrase here');",
);
unset($result);
$config = file_get_contents('wp-config-sample.php');
$config = str_replace($keys_replace, $keys, $config);
file_put_contents('wp-config.php', $config);
exec('rm wp-config-sample.php');